Article(id=1249065618352317316, tenantId=1146029695717560320, journalId=1249024468962553931, issueId=1249065613306569569, articleNumber=null, orderNo=null, doi=10.11868/j.issn.1005-5053.2025.000113, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1750608000000, receivedDateStr=2025-06-23, revisedDate=null, revisedDateStr=null, acceptedDate=1753804800000, acceptedDateStr=2025-07-30, onlineDate=1775730049931, onlineDateStr=2026-04-09, pubDate=1759248000000, pubDateStr=2025-10-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1775730049931, onlineIssueDateStr=2026-04-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1775730049931, creator=13041195026, updateTime=1775730049931, updator=13041195026, issue=Issue{id=1249065613306569569, tenantId=1146029695717560320, journalId=1249024468962553931, year='2025', volume='45', issue='5', pageStart='1', pageEnd='182', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1775730048728, creator=13041195026, updateTime=1775730148042, updator=13041195026, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1249066029947757306, tenantId=1146029695717560320, journalId=1249024468962553931, issueId=1249065613306569569, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1249066029951951611, tenantId=1146029695717560320, journalId=1249024468962553931, issueId=1249065613306569569, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=150, endPage=160, ext={EN=ArticleExt(id=1249065618599781261, articleId=1249065618352317316, tenantId=1146029695717560320, journalId=1249024468962553931, language=EN, title=Effect of grain refinement on the stress rupture property of K447A alloy, columnId=1249065616670396851, journalTitle=Journal of Aeronautical Materials, columnName=Research Paper, runingTitle=null, highlight=null, articleAbstract=
Grain refinement can effectively enhance mechanical properties of materials at low and medium temperatures, however, it may weaken the stress rupture property above the equicohesive temperature. To study the effect of grain refinement on the stress rupture property of K447A alloy, the microstructure evolutions of alloys with three grain sizes and their corresponding stress rupture mechanisms under the conditions of 760 ℃/724 MPa, 815 ℃/600 MPa, 870 ℃/365 MPa and 980 ℃/210 MPa are investigated using scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS). The results show that the equicohesive temperature of K447A alloy lies between 815 ℃ and 870 ℃. Grain refinement shows a temperature-dependent effect on the stress rupture life of K447A alloy. At 760 ℃/724 MPa, as the grain size decreases from 5.0 mm to 1.3 mm and then to 58 μm, the stress rupture life of K447A alloy increases from 83 h to 115 h and further to 194 h, respectively. At 815 ℃/600 MPa, the stress rupture life increases from 31 h to 84 h, as the grain size decreases, and then slightly drops to 76 h. At 870 ℃/365 MPa and 980 ℃/210 MPa, the stress rupture life shows a monotonic decreases with grain refinement. Therefore, grain refinement serves as an effective technology to improve the stress rupture property of K447A alloy below 870 ℃.The stress rupture process is dominated by intragranular deformation below 815 ℃, and grain refinement mainly extends the stress rupture life by shortening the slip band length and increasing the volume fraction of γ′ phase. Above 870 ℃, grain boundary sliding dominates the stress rupture process. The deterioration of the stress rupture property due to grain refinement can be attributed to the severe grain boundary slip at high temperatures, grain boundary oxidation and the formation of brittle AlN and a low-strength precipitation free zone(PFZ).
, correspAuthors=Chengbo XIAO, Jinshan HE, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2025 Journal of Aeronautical Materials. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Pinpin HU, Ning DING, Yue WANG, Yanjia LI, Mingjun ZHANG, Chengbo XIAO, Jinshan HE, Xitao WANG), CN=ArticleExt(id=1249065622143968206, articleId=1249065618352317316, tenantId=1146029695717560320, journalId=1249024468962553931, language=CN, title=晶粒细化对K447A合金持久性能的影响, columnId=1249065616850751931, journalTitle=航空材料学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
晶粒细化是提高合金中低温性能的有效手段,但在等强温度以上可能会损伤高温持久性能。本工作结合扫描电子显微镜及能谱分析研究K447A合金显微组织演化及持久断裂机制,并讨论K447A合金在760 ℃/724 MPa、815 ℃/600 MPa、870 ℃/365 MPa和980 ℃/210 MPa条件下晶粒细化对持久性能的影响。结果表明,K447A合金持久等强温度介于815~870 ℃,晶粒细化对K447A合金持久寿命的影响具有明显的温度依赖性。在760 ℃/724 MPa条件下,随着晶粒尺寸从5.0 mm分别减小至1.3 mm和58 μm,K447A合金持久寿命从83 h分别提高至115 h和194 h;在815 ℃/600 MPa条件下,随着晶粒细化,持久寿命先从31 h增加至84 h,之后略降至76 h;在870 ℃/365 MPa及980 ℃/210 MPa条件下,随着晶粒细化,持久寿命逐步减小。因此,晶粒细化是改善K447A合金在870 ℃以下持久性能的有效技术手段。K447A合金持久变形在815 ℃以下以晶内变形为主,晶粒细化主要通过限制滑移带长度和提高γ′相体积分数延长持久寿命;在870 ℃以上K447A合金持久变形以晶界滑移为主,晶粒细化对持久性能的劣化归因于高温晶界滑移加剧、氧化及由此导致的脆性AlN及低强度贫化区。
, correspAuthors=肖程波, 何金珊, authorNote=null, correspAuthorsNote=
, copyrightStatement=版权所有©《航空材料学报》编辑部 2025, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=gmevNtOuyNK+mqDQlaJYog==, magXml=4AIuvXnjbPYoGbuBFnzimA==, pdfUrl=null, pdf=HsP/blzzXNrLv7V8LweAhA==, pdfFileSize=9262733, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=/ACyNJ8T5ywdw7pn09m1nQ==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=oAFMFd2BRzPnK6lqls3y6Q==, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=胡聘聘, 丁宁, 王越, 李妍佳, 张明军, 肖程波, 何金珊, 王西涛)}, authors=[Author(id=1249065623100268544, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1249065623175766025, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065623100268544, language=EN, stringName=Pinpin HU, firstName=Pinpin, middleName=null, lastName=HU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1Science and Technology on Advanced High Temperature Structural Materials Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1249065623297400848, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065623100268544, language=CN, stringName=胡聘聘, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1249065622546621410, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, xref=1, ext=[AuthorCompanyExt(id=1249065622555010019, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, companyId=1249065622546621410, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1Science and Technology on Advanced High Temperature Structural Materials Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China), AuthorCompanyExt(id=1249065622563398628, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, companyId=1249065622546621410, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2The Sixth Military Representative Office of the Airborne Equipment Department in Beijing,Beijing 100013,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1249065623586807846, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065623393869848, language=CN, stringName=丁宁, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2空军驻北京地区第六军事代表室,北京 100013, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1249065622676644841, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, xref=2, ext=[AuthorCompanyExt(id=1249065622685033450, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, companyId=1249065622676644841, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1249065625369387067, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065623687471152, language=CN, stringName=王越, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3北京科技大学 钢铁共性技术协同创新中心,北京 100083, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1249065622794085358, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, xref=3, ext=[AuthorCompanyExt(id=1249065622877971443, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, companyId=1249065622794085358, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3北京科技大学 钢铁共性技术协同创新中心,北京 100083)])]), Author(id=1249065625495216191, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1249065625642016838, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065625495216191, language=EN, stringName=Yanjia LI, firstName=Yanjia, middleName=null, lastName=LI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1Science and Technology on Advanced High Temperature Structural Materials Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1249065625730097226, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065625495216191, language=CN, stringName=李妍佳, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1249065622546621410, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, xref=1, ext=[AuthorCompanyExt(id=1249065622555010019, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, companyId=1249065622546621410, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095)])]), Author(id=1249065625864314969, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1249065625956589669, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065625864314969, language=EN, stringName=Mingjun ZHANG, firstName=Mingjun, middleName=null, lastName=ZHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1Science and Technology on Advanced High Temperature Structural Materials Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1249065626027892844, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065625864314969, language=CN, stringName=张明军, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1249065622546621410, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, xref=1, ext=[AuthorCompanyExt(id=1249065622555010019, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, companyId=1249065622546621410, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095)])]), Author(id=1249065626141139063, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, orderNo=5, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=cbxiao0288@sina.com, emailSecond=null, emailThird=null, correspondingAuthor=1, authorType=1, ext={EN=AuthorExt(id=1249065626233413759, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065626141139063, language=EN, stringName=Chengbo XIAO, firstName=Chengbo, middleName=null, lastName=XIAO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, *, address=
1Science and Technology on Advanced High Temperature Structural Materials Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1249065626325688454, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065626141139063, language=CN, stringName=肖程波, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, *, address=
1中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1249065622546621410, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, xref=1, ext=[AuthorCompanyExt(id=1249065622555010019, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, companyId=1249065622546621410, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095)])]), Author(id=1249065626426351758, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, orderNo=6, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=hejinshan@ustb.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=1, authorType=1, ext={EN=AuthorExt(id=1249065626510237845, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, authorId=1249065626426351758, language=EN, stringName=Jinshan HE, firstName=Jinshan, middleName=null, lastName=HE, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
3, *, address=
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Schematic diagrams of specimen for stress rupture testing under conditions of 760-870 ℃(a) and 980 ℃(b), figureFileSmall=qa7N2lFP7xXtXe0E6Uhw3g==, figureFileBig=/ACyNJ8T5ywdw7pn09m1nQ==, tableContent=null), ArticleFig(id=1249065630251557115, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=图1, caption=
760~870 ℃(a)和980 ℃(b)条件下持久试样尺寸示意图, figureFileSmall=qa7N2lFP7xXtXe0E6Uhw3g==, figureFileBig=/ACyNJ8T5ywdw7pn09m1nQ==, tableContent=null), ArticleFig(id=1249065630473855237, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Fig.2, caption=
Grain distributions and microstructure morphologies of K447 alloy (a)CC sample;(b)FG sample;(c)MG sample;(1)grain distribution;(2)dendrite and γ/γ′ eutectic;(3)γ′ phase, figureFileSmall=BeSrVsWpvExucs8ZXDZ1Jg==, figureFileBig=/sQhSQr0OZzaFSAnC/d11g==, tableContent=null), ArticleFig(id=1249065630549352714, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=图2, caption=
K447A合金晶粒分布及显微组织形貌 (a)CC试样;(b)FG试样;(c)MG试样;(1)晶粒分布;(2)枝晶与γ/γ′共晶组织;(3)γ′强化相, figureFileSmall=BeSrVsWpvExucs8ZXDZ1Jg==, figureFileBig=/sQhSQr0OZzaFSAnC/d11g==, tableContent=null), ArticleFig(id=1249065630608072973, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Fig.3, caption=
Dendrite segregation coefficients of K447A alloy, figureFileSmall=xIOu857MJ4lGYufk3Vn/+Q==, figureFileBig=cGNkVCeSGCFQfP5PPZ1Ysg==, tableContent=null), ArticleFig(id=1249065630708736273, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=图3, caption=
K447A合金枝晶偏析系数, figureFileSmall=xIOu857MJ4lGYufk3Vn/+Q==, figureFileBig=cGNkVCeSGCFQfP5PPZ1Ysg==, tableContent=null), ArticleFig(id=1249065630784233749, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Fig.4, caption=
Stress rupture lives of K447A alloy under different conditions, figureFileSmall=4ZCQAU+X4y43MknNEGD0tQ==, figureFileBig=84m2Mrv/anTNPafZjB1Sdg==, tableContent=null), ArticleFig(id=1249065630893285659, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=图4, caption=
K447A合金不同条件下持久寿命, figureFileSmall=4ZCQAU+X4y43MknNEGD0tQ==, figureFileBig=84m2Mrv/anTNPafZjB1Sdg==, tableContent=null), ArticleFig(id=1249065630943617309, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Fig.5, caption=
Longitudinal microstructures of K447A alloy after stress rupture under different conditions(a)CC sample;(b)FG sample;(c)MG sample;(1)760 ℃/724 MPa;(2)815 ℃/600 MPa;(3)870 ℃/365 MPa;(4)980 ℃/210 MPa, figureFileSmall=rfgyYrpn/7EnwX68coRbew==, figureFileBig=5naGms51dA1UXzzddnf5yA==, tableContent=null), ArticleFig(id=1249065631002337570, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=图5, caption=
K447A合金不同条件下持久断裂后纵截面显微组织 (a)CC试样;(b)FG试样;(c)MG试样;(1)760 ℃/724 MPa;(2)815 ℃/600 MPa;(3)870 ℃/365 MPa;(4)980 ℃/210 MPa, figureFileSmall=rfgyYrpn/7EnwX68coRbew==, figureFileBig=5naGms51dA1UXzzddnf5yA==, tableContent=null), ArticleFig(id=1249065631073640742, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Fig.6, caption=
Stress rupture surface morphologies of K447 alloy under different conditions (a)CC sample;(b)FG sample;(c)MG sample;(1)760 ℃/724 MPa;(2)815 ℃/600 MPa;(3)870 ℃/365 MPa;(4)980 ℃/210 MPa, figureFileSmall=dTZrp45Nz7/RWADorqVAwQ==, figureFileBig=ZqZDhyQ9msgZX/7RaCy5SA==, tableContent=null), ArticleFig(id=1249065631153332521, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=图6, caption=
K447A合金不同条件下持久断口形貌 (a)CC试样;(b)FG试样;(c)MG试样;(1)760 ℃/724 MPa;(2)815 ℃/600 MPa;(3)870 ℃/365 MPa;(4)980 ℃/210 MPa, figureFileSmall=dTZrp45Nz7/RWADorqVAwQ==, figureFileBig=ZqZDhyQ9msgZX/7RaCy5SA==, tableContent=null), ArticleFig(id=1249065631304327471, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Fig.7, caption=
Microstructures of oxidation cracks in MG sample after stress rupture under different conditions (a)760 ℃/724 MPa;(b)815 ℃/600 MPa;(c)870 ℃/365 MPa;(d)980 ℃/210 MPa, figureFileSmall=MZGI1RIiESDmU8QdN2NVaw==, figureFileBig=zgiINZPFHEyiLelgE1Ha6Q==, tableContent=null), ArticleFig(id=1249065631430156597, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=图7, caption=
MG试样不同条件下持久断裂后氧化裂纹显微组织 (a)760 ℃/724 MPa;(b)815 ℃/600 MPa;(c)870 ℃/365 MPa;(d)980 ℃/210 MPa, figureFileSmall=MZGI1RIiESDmU8QdN2NVaw==, figureFileBig=zgiINZPFHEyiLelgE1Ha6Q==, tableContent=null), ArticleFig(id=1249065631560180027, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Fig.8, caption=
EDS analysis at oxidation cracks in MG sample under different conditions of815 ℃/600 MPa(a) and 980 ℃/210 MPa(b), figureFileSmall=87V/kzQt5qAV15iLUmV9TQ==, figureFileBig=nQ9XQIsh3f0F6fNAqEDH5Q==, tableContent=null), ArticleFig(id=1249065631669231938, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=图8, caption=
MG试样分别在815 ℃/600 MPa(a)和980 ℃/210 MPa(b)条件下氧化裂纹处能谱仪分析, figureFileSmall=87V/kzQt5qAV15iLUmV9TQ==, figureFileBig=nQ9XQIsh3f0F6fNAqEDH5Q==, tableContent=null), ArticleFig(id=1249065631769895239, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Tab.1, caption=
Chemical composition of K447A alloy(mass fraction/%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Al | Ti | Co | Cr | Ta | W | Mo | Hf | C | B | Zr | Ni |
| 5.4 | 1.2 | 10.1 | 8.5 | 3.04 | 10.1 | 0.8 | 3.2 | 0.15 | 0.015 | 0.055 | Bal. |
), ArticleFig(id=1249065631887335756, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=表1, caption=
K447A合金化学成分(质量分数/%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Al | Ti | Co | Cr | Ta | W | Mo | Hf | C | B | Zr | Ni |
| 5.4 | 1.2 | 10.1 | 8.5 | 3.04 | 10.1 | 0.8 | 3.2 | 0.15 | 0.015 | 0.055 | Bal. |
), ArticleFig(id=1249065632004776274, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Tab.2, caption=
Quantitative statistics of microstructures in K447A alloy
, figureFileSmall=null, figureFileBig=null, tableContent=
| Sample | Average grain size/mm | Volume fraction of γ/γ′ eutectic/% | Volume fraction of γ′ phase/% | Average size of primary γ′ phase/nm | Average size of secondary γ′ phase/nm |
| CC | 5.0±1.1 | 2.1±0.4 | 34.4±1.9 | 724±35 | 172±16 |
| FG | 1.3±0.4 | 1.9±0.5 | 45.7±2.9 | 703±27 | 164±14 |
| MG | 0.058±0.017 | 1.8±2.4 | 52.1±2.4 | 665±21 | 115±8 |
), ArticleFig(id=1249065632101245273, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=表2, caption=
K447A合金的显微组织定量统计
, figureFileSmall=null, figureFileBig=null, tableContent=
| Sample | Average grain size/mm | Volume fraction of γ/γ′ eutectic/% | Volume fraction of γ′ phase/% | Average size of primary γ′ phase/nm | Average size of secondary γ′ phase/nm |
| CC | 5.0±1.1 | 2.1±0.4 | 34.4±1.9 | 724±35 | 172±16 |
| FG | 1.3±0.4 | 1.9±0.5 | 45.7±2.9 | 703±27 | 164±14 |
| MG | 0.058±0.017 | 1.8±2.4 | 52.1±2.4 | 665±21 | 115±8 |
), ArticleFig(id=1249065632185131359, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=EN, label=Tab.3, caption=
Composition analysis of PFZ and original γ matrix[11](atom fraction/%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Position | N | O | Al | Ti | Cr | Co | Mo | Hf | Ta | W | Ni |
| PFZ-Pt.1 | 2.52 | 2.94 | 0.85 | 0.51 | 6.72 | 10.22 | 0.45 | 0.36 | 0.55 | 3.23 | 71.65 |
| PFZ-Pt.2 | 2.47 | 3.16 | 0.46 | 0.58 | 6.56 | 10.10 | 0.38 | 0.33 | 0.76 | 3.10 | 72.10 |
| Original γ[11] | 0.00 | 0.00 | 7.57 | 0.85 | 10.25 | 14.78 | 0.47 | 0.37 | 1.48 | 4.90 | 59.33 |
), ArticleFig(id=1249065632277406052, tenantId=1146029695717560320, journalId=1249024468962553931, articleId=1249065618352317316, language=CN, label=表3, caption=
PFZ及原始γ基体成分分析[11](原子分数/%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Position | N | O | Al | Ti | Cr | Co | Mo | Hf | Ta | W | Ni |
| PFZ-Pt.1 | 2.52 | 2.94 | 0.85 | 0.51 | 6.72 | 10.22 | 0.45 | 0.36 | 0.55 | 3.23 | 71.65 |
| PFZ-Pt.2 | 2.47 | 3.16 | 0.46 | 0.58 | 6.56 | 10.10 | 0.38 | 0.33 | 0.76 | 3.10 | 72.10 |
| Original γ[11] | 0.00 | 0.00 | 7.57 | 0.85 | 10.25 | 14.78 | 0.47 | 0.37 | 1.48 | 4.90 | 59.33 |
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