Article(id=1322281894390125061, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1322281755323777794, articleNumber=null, orderNo=null, doi=10.11868/j.issn.1001-4381.2026.000280, pmid=null, cstr=32421.14.j.issn.1001-4381.2026.000280, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1780416000000, receivedDateStr=2026-06-03, revisedDate=null, revisedDateStr=null, acceptedDate=1782057600000, acceptedDateStr=2026-06-22, onlineDate=1793186170432, onlineDateStr=2026-10-28, pubDate=1787155200000, pubDateStr=2026-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793186170432, onlineIssueDateStr=2026-10-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793186170432, creator=13701087609, updateTime=1793186170432, updator=13701087609, issue=Issue{id=1322281755323777794, tenantId=1146029695717560320, journalId=1220038251117760515, year='2026', volume='54', issue='8', pageStart='1', pageEnd='358', issueExtLink='null', onlineDate='null', pubDate='1787155200000', pubDateStr='2026-08-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1793186137276, creator='13701087609', updateTime=1793186275878, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322282336729805035, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1322281755323777794, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322282336729805036, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1322281755323777794, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=303, endPage=312, ext={EN=ArticleExt(id=1322281894578868742, articleId=1322281894390125061, tenantId=1146029695717560320, journalId=1220038251117760515, language=EN, title=Creep behavior of third-generation single crystal superalloy DD9 at 1100 ℃/137 MPa, columnId=null, journalTitle=Journal of Materials Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The creep behavior of the third-generation single crystal superalloy DD9 at 1100 ℃/137 MPa is investigated using high-throughput scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results show that the average creep rupture life of the alloy under this condition is 260 h. During the creep process,the γ' strengthening phase exhibits a gradual evolution from an initial cuboidal shape to directional coarsening, rafting, and eventually to local derafting at the later stage of creep. The composition difference between the dendrite core and the interdendritic regions is an important factor affecting the microstructural evolution of the DD9 alloy. The dislocation evolution during creep is characterized by initial dislocation motion mainly within the γ matrix channels, the formation of dense dislocation networks at the γ/γ' interfaces during secondary creep, the shearing of the γ' strengthening phase by dislocation pairs during tertiary creep, and a further increase in the number of dislocations shearing into the γ' phase at the fracture stage.
, authors=Qiao CHEN, Jiarong LI, Xiaopeng LI, Wanpeng YANG, Xiaodai YUE, Shizhong LIU, Jinqian ZHAO, authorsList=Qiao CHEN, Jiarong LI, Xiaopeng LI, Wanpeng YANG, Xiaodai YUE, Shizhong LIU, Jinqian ZHAO, authorCompany=null, correspAuthors=Jiarong LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, 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, fund=null), CN=ArticleExt(id=1322281898756395553, articleId=1322281894390125061, tenantId=1146029695717560320, journalId=1220038251117760515, language=CN, title=第三代单晶高温合金DD9在1100 ℃/137 MPa条件下的蠕变行为, columnId=null, journalTitle=材料工程, columnName=, runingTitle=null, highlight=null, articleAbstract=
采用高通量扫描电镜和透射电镜研究了第三代单晶高温合金DD9在1100 ℃/137 MPa条件下的蠕变行为。结果表明:该条件下合金的平均蠕变断裂寿命为260 h。蠕变过程中,γ'强化相呈现出由初始的立方状经定向粗化、筏化,逐步演变为蠕变后期局部解筏的特征。枝晶干与枝晶间区域的成分差异是影响DD9合金组织演化差异的重要因素。位错运动表现为蠕变初期主要在基体相γ通道内运动,蠕变第二阶段在γ/γ'界面处形成致密的位错网,蠕变第三阶段位错对切入γ'强化相,断裂阶段切入γ'相的位错数量进一步增加。
, authors=陈巧, 李嘉荣, 李晓鹏, 杨万鹏, 岳晓岱, 刘世忠, 赵金乾, authorsList=陈巧, 李嘉荣, 李晓鹏, 杨万鹏, 岳晓岱, 刘世忠, 赵金乾, authorCompany=null, correspAuthors=李嘉荣, authorNote=null, correspAuthorsNote=
李嘉荣(1962—),男,研究员,博士,研究方向为单晶高温合金,联系地址:北京市81信箱8分箱(100095),E-mail:
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2006., articleTitle=null, refAbstract=null)], funds=[Fund(id=1322281908042584691, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, awardId=2023-2, language=CN, fundingSource=稳定支持项目(2023-2), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1322281899247129122, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, xref=null, ext=[AuthorCompanyExt(id=1322281899486204451, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, companyId=1322281899247129122, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Science and Technology on Advanced High Temperature Structural Materials Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China), AuthorCompanyExt(id=1322281899498787364, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, companyId=1322281899247129122, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=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)])], figs=[ArticleFig(id=1322281904083161685, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.1, caption=
Schematic diagram of creep specimen, figureFileSmall=QLiyNFgfNNjeIp6ygeziDw==, figureFileBig=3C8wIy6OVm3rPFKB0gqXHQ==, tableContent=null), ArticleFig(id=1322281904150270550, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图1, caption=
蠕变试样示意图, figureFileSmall=QLiyNFgfNNjeIp6ygeziDw==, figureFileBig=3C8wIy6OVm3rPFKB0gqXHQ==, tableContent=null), ArticleFig(id=1322281904380957271, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.2, caption=
Creep strain-time curves(a) and creep strain rate-time curves(b) of DD9 alloy at 1100 ℃/137 MPa, figureFileSmall=iTAo4WR9L+DlVM6b83FTWQ==, figureFileBig=hcGW4IuEF3fUiLdBGLP2pg==, tableContent=null), ArticleFig(id=1322281904448066136, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图2, caption=
DD9合金在1100 ℃/137 MPa下的蠕变应变-时间曲线(a)与蠕变应变速率-时间曲线(b), figureFileSmall=iTAo4WR9L+DlVM6b83FTWQ==, figureFileBig=hcGW4IuEF3fUiLdBGLP2pg==, tableContent=null), ArticleFig(id=1322281904523563609, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.3, caption=
Fracture morphologies(a) and longitudinal-sectional microstructures(b),(c) of DD9 alloy after creep at 1100 ℃/137 MPa, figureFileSmall=zTum8n/uXm1u9TNHfcWSLA==, figureFileBig=H2+TIfx6m0mA+hFL0x1g6w==, tableContent=null), ArticleFig(id=1322281904603255386, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图3, caption=
DD9合金在1100 ℃/137 MPa下的蠕变断口形貌(a)及其纵截面组织(b),(c), figureFileSmall=zTum8n/uXm1u9TNHfcWSLA==, figureFileBig=H2+TIfx6m0mA+hFL0x1g6w==, tableContent=null), ArticleFig(id=1322281904674558555, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.4, caption=
EDS mapping results of specimen at a creep strain of 0.75%, figureFileSmall=EIYhf4LDkC2Rz6RkrG9Ygw==, figureFileBig=AltWKBfqGyIAp+fwI8QBIA==, tableContent=null), ArticleFig(id=1322281904745861724, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图4, caption=
蠕变应变量为0.75%试样的EDS面扫描结果, figureFileSmall=EIYhf4LDkC2Rz6RkrG9Ygw==, figureFileBig=AltWKBfqGyIAp+fwI8QBIA==, tableContent=null), ArticleFig(id=1322281904808776285, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.5, caption=
Composition of γ and γ' phases in dendrite core and interdendritic regions at different creep stages(a)γ phase composition in dendrite core;(b)γ phase composition in interdendritic region;(c)evolution of Re content in γ phase of dendrite core and interdendritic regions at different creep stages;(d)γ' phase composition in dendrite core;(e)γ' phase composition in interdendritic region
, figureFileSmall=HV0p3giWSmWcA2TY8KLJvw==, figureFileBig=HJWwB+fSP1hBNl4bP/U7wQ==, tableContent=null), ArticleFig(id=1322281904871690846, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图5, caption=
不同蠕变阶段枝晶干与枝晶间区域γ及γ'相成分(a)枝晶干γ相成分;(b)枝晶间γ相成分;(c)不同蠕变阶段枝晶干与枝晶间γ相中Re含量变化;(d)枝晶干γ'相成分;(e)枝晶间γ'相成分
, figureFileSmall=HV0p3giWSmWcA2TY8KLJvw==, figureFileBig=HJWwB+fSP1hBNl4bP/U7wQ==, tableContent=null), ArticleFig(id=1322281906536829535, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.6, caption=
Microstructures of DD9 alloy after fully heat treatment(a)dendrite core region;(b)interdendritic region
, figureFileSmall=g+emSMVKuhDjOcshGmuDtg==, figureFileBig=SjI0iS1G5FiSzRmYadosqA==, tableContent=null), ArticleFig(id=1322281906624909920, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图6, caption=
DD9合金完全热处理后的显微组织(a)枝晶干区域;(b)枝晶间区域
, figureFileSmall=g+emSMVKuhDjOcshGmuDtg==, figureFileBig=SjI0iS1G5FiSzRmYadosqA==, tableContent=null), ArticleFig(id=1322281906717184609, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.7, caption=
Microstructures of dendrite core(1) and interdendritic regions(2) at different creep stages(a)at creep stage Ⅱ;(b)at creep stage Ⅲ;(c)at creep rupture stage,the position is approximately 3 mm away from the fracture surface
, figureFileSmall=7RHbugEuF1NfHrDnFQpX2Q==, figureFileBig=5QJ2CADV6DzdKOqruIZpaQ==, tableContent=null), ArticleFig(id=1322281906801070690, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图7, caption=
不同蠕变阶段枝晶干(1)与枝晶间(2)显微组织(a)蠕变第二阶段;(b)蠕变第三阶段;(c)蠕变断裂阶段,位置距断口约3 mm
, figureFileSmall=7RHbugEuF1NfHrDnFQpX2Q==, figureFileBig=5QJ2CADV6DzdKOqruIZpaQ==, tableContent=null), ArticleFig(id=1322281906876568163, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.8, caption=
TEM images of dendritic core at different creep stages(a)dense dislocation network at creep stage Ⅱ;(b)dislocation bowing at creep stage Ⅱ;(c)dislocation pairs at creep stage Ⅲ;
(d)Z-shaped dislocations at creep stage Ⅲ;(e)dislocation configuration at creep rupture stage
, figureFileSmall=D7Wbq/0dmrPcbq16GyOAZA==, figureFileBig=WCd9Jsqz4ZTNB9BWRVGumA==, tableContent=null), ArticleFig(id=1322281906968842852, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图8, caption=
不同蠕变阶段枝晶干TEM图(a)蠕变第二阶段致密的位错网;(b)蠕变第二阶段位错弓出;(c)蠕变第三阶段位错对;(d)蠕变第三阶段“Z”形位错;(e)蠕变断裂阶段位错组态
, figureFileSmall=D7Wbq/0dmrPcbq16GyOAZA==, figureFileBig=WCd9Jsqz4ZTNB9BWRVGumA==, tableContent=null), ArticleFig(id=1322281907044340325, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.9, caption=
Precipitation behavior of TCP phases in DD9 alloy at different creep stages(a)at creep stage Ⅱ;(b)at creep stage Ⅲ;(c)at creep rupture stage
, figureFileSmall=Az7MHFSvnkdwRqGzY76MiQ==, figureFileBig=KSbxLghufD+6EM3pCXRfXw==, tableContent=null), ArticleFig(id=1322281907128226406, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图9, caption=
不同蠕变阶段DD9合金TCP相析出行为(a)蠕变第二阶段;(b)蠕变第三阶段;(c)蠕变断裂阶段
, figureFileSmall=Az7MHFSvnkdwRqGzY76MiQ==, figureFileBig=KSbxLghufD+6EM3pCXRfXw==, tableContent=null), ArticleFig(id=1322281907186946663, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.10, caption=
TEM images and SAED patterns of TCP phases with different morphologies(a)blocky phase;(b)plate-like phase
, figureFileSmall=a43bSpZrnWevadHFzvwU4g==, figureFileBig=s8kK/T0u+cZnCaMNsAkFBw==, tableContent=null), ArticleFig(id=1322281907249861224, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图10, caption=
不同形态TCP相的TEM图及选区电子衍射照片(a)块状;(b)片状
, figureFileSmall=a43bSpZrnWevadHFzvwU4g==, figureFileBig=s8kK/T0u+cZnCaMNsAkFBw==, tableContent=null), ArticleFig(id=1322281907304387177, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Fig.11, caption=
Evolution characteristics of isolated plate-like TCP phase(1) and intersecting TCP phase(2) at different creep stages(a)at creep stage Ⅱ;(b)at creep stage Ⅲ;(c)at creep rupture stage
, figureFileSmall=7vx+Gq1DcNt+ALqSskg64g==, figureFileBig=+MrKh+UsqYZ8F3sepFeBXw==, tableContent=null), ArticleFig(id=1322281907371496042, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=图11, caption=
不同蠕变阶段孤立片状TCP相(1)与交叉分布TCP相(2)演化特征(a)蠕变第二阶段;(b)蠕变第三阶段;(c)蠕变断裂阶段
, figureFileSmall=7vx+Gq1DcNt+ALqSskg64g==, figureFileBig=+MrKh+UsqYZ8F3sepFeBXw==, tableContent=null), ArticleFig(id=1322281907438604907, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Table 1, caption=
Chemical compositions of DD9 alloy (mass fraction/%)[25]
, figureFileSmall=null, figureFileBig=null, tableContent=
| Cr | Co | Mo | W | Ta | Re | Nb | Al | Hf | C | Ni |
|---|
| 3.5 | 7.0 | 2.0 | 6.5 | 7.5 | 4.5 | 0.5 | 5.6 | 0.1 | 0.008 | Bal. |
), ArticleFig(id=1322281907518296684, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=表1, caption=
DD9合金化学成分(质量分数/%)[25]
, figureFileSmall=null, figureFileBig=null, tableContent=
| Cr | Co | Mo | W | Ta | Re | Nb | Al | Hf | C | Ni |
|---|
| 3.5 | 7.0 | 2.0 | 6.5 | 7.5 | 4.5 | 0.5 | 5.6 | 0.1 | 0.008 | Bal. |
), ArticleFig(id=1322281907597988461, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Table 2, caption=
Comparison of compositions and creep rupture properties of DD9 and TMS-75 alloys at 1100 ℃/137 MPa[6,26-27]
, figureFileSmall=null, figureFileBig=null, tableContent=
| Alloy | Mass fraction/% | Creep rupture life/h | Minimum creep rate/s-1 |
|---|
| Re | W | Nb | Ta |
|---|
| DD9 | 4.5 | 6.5 | 0.5 | 7.5 | 260 | 6.9×10-9 |
| TMS-75 | 5.0 | 6.0 | | 6.0 | 227 | (1~2)×10-8 |
), ArticleFig(id=1322281907669291630, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=表2, caption=
DD9与TMS-75合金成分及蠕变性能对比[6,26-27]
, figureFileSmall=null, figureFileBig=null, tableContent=
| Alloy | Mass fraction/% | Creep rupture life/h | Minimum creep rate/s-1 |
|---|
| Re | W | Nb | Ta |
|---|
| DD9 | 4.5 | 6.5 | 0.5 | 7.5 | 260 | 6.9×10-9 |
| TMS-75 | 5.0 | 6.0 | | 6.0 | 227 | (1~2)×10-8 |
), ArticleFig(id=1322281907748983407, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Table 3, caption=
R values calculated based on formula (1)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Region | R |
|---|
| Creep stage Ⅱ | Creep stage Ⅲ |
|---|
| Dendrite core | 1.1 | 1.7 |
| Interdendritic | 1.3 | 4.6 |
), ArticleFig(id=1322281907799315056, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=表3, caption=
基于公式(1)计算的R值结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| Region | R |
|---|
| Creep stage Ⅱ | Creep stage Ⅲ |
|---|
| Dendrite core | 1.1 | 1.7 |
| Interdendritic | 1.3 | 4.6 |
), ArticleFig(id=1322281907879006833, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=EN, label=Table 4, caption=
Chemical compositions of TCP phases (atomic fraction/%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Phase | Al | Cr | Co | Ni | Nb | Mo | Ta | W | Re |
|---|
| P | 1.75 | 11.31 | 11.82 | 28.43 | 0.22 | 6.38 | 1.11 | 13.2 | 25.59 |
), ArticleFig(id=1322281907950310002, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1322281894390125061, language=CN, label=表4, caption=
TCP相化学成分(原子分数/%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Phase | Al | Cr | Co | Ni | Nb | Mo | Ta | W | Re |
|---|
| P | 1.75 | 11.31 | 11.82 | 28.43 | 0.22 | 6.38 | 1.11 | 13.2 | 25.59 |
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