Article(id=1321935414638784639, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1321927083589227197, articleNumber=null, orderNo=null, doi=10.11868/j.issn.1001-4381.2024.000256, pmid=null, cstr=32421.14.j.issn.1001-4381.2024.000256, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1712592000000, receivedDateStr=2024-04-09, revisedDate=null, revisedDateStr=null, acceptedDate=1716307200000, acceptedDateStr=2024-05-22, onlineDate=1793103563222, onlineDateStr=2026-10-27, pubDate=1776614400000, pubDateStr=2026-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793103563222, onlineIssueDateStr=2026-10-27, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793103563222, creator=13701087609, updateTime=1793103563222, updator=13701087609, issue=Issue{id=1321927083589227197, tenantId=1146029695717560320, journalId=1220038251117760515, year='2026', volume='54', issue='4', pageStart='1', pageEnd='345', issueExtLink='null', onlineDate='null', pubDate='1776614400000', pubDateStr='2026-04-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793101576945, creator='13701087609', updateTime=1793101576945, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=258, endPage=268, ext={EN=ArticleExt(id=1321935414840111232, articleId=1321935414638784639, tenantId=1146029695717560320, journalId=1220038251117760515, language=EN, title=Small crack initiation and propagation behavior of selective laser melting TC4 alloy under cyclic loading, columnId=1220689384450478826, journalTitle=Journal of Materials Engineering, columnName=RESEARCH ARTICLE, runingTitle=null, highlight=null, articleAbstract=
Based on the in-situ fatigue test technique of scanning electron microscope (SEM),the small crack behavior of selective laser melting (SLM) TC4 alloy is studied. The focused ion beam (FIB) technique is used to manufacture the simulative initial defects in the process of additive manufacturing,and the initiation and propagation behavior of small cracks induced by defects are observed under cyclic loading. The results show that under cyclic loading,small cracks are easy to initiate at the surface defect,and the crack fatigue initiation life is short. The fatigue life of SLM TC4 alloys is mainly consumed in the small crack propagation stage. Affected by the microstructure,the small cracks are more likely to propagate along the α/β interface. Due to the random orientation of α laths,the path of small cracks is deflected several times in the initial propagation stage,exhibiting a mixed mode of propagation along α lamellae and through α lamellae within grains, resulting in significant scatter in crack growth rates. At the stable crack propagation stage,the plastic slips of the crack tip are obvious,the influence of microstructure is reduced,and the propagation path tends to straighten. Comparative analysis with long crack growth data indicates that SLM TC4 alloy exhibits a significant “small crack effect”.
, authors=Liangliang WU
1, 2, 3, Ruida XU
1, 2, 3, Zehui JIAO
1, 2, 3, Huichen YU
1, 2, 3, authorsList=Liangliang WU, Ruida XU, Zehui JIAO, Huichen YU, authorCompany=null, correspAuthors=Zehui JIAO, Huichen YU, 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=1321935419340599453, articleId=1321935414638784639, tenantId=1146029695717560320, journalId=1220038251117760515, language=CN, title=循环载荷下激光选区熔化TC4合金小裂纹萌生与扩展行为, columnId=1220689384622445292, journalTitle=材料工程, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
基于扫描电镜原位疲劳测试技术,开展激光选区熔化(selective laser melting,SLM) TC4合金的小裂纹行为研究,通过聚焦离子束技术模拟增材制造过程中的初始缺陷,观察循环载荷下由缺陷诱发的合金小裂纹萌生与扩展行为。结果表明:循环载荷下,小裂纹极易在表面缺陷处萌生,裂纹萌生寿命较短,SLM TC4合金的疲劳寿命主要消耗在小裂纹扩展阶段。受微观结构影响,裂纹更容易沿着α/β界面扩展,由于α板条取样随机,小裂纹在扩展初期路径发生多次偏折,在晶粒内存在沿α片层与穿过α片层扩展的混合模式,裂纹扩展速率分散性大;当裂纹进入稳定扩展阶段后,裂纹尖端塑性滑移显著,微观结构的影响减弱,扩展路径趋于平直。与长裂纹扩展数据的对比分析表明,SLM TC4合金具有显著的“小裂纹效应”。
, authors=武亮亮
1, 2, 3, 许瑞达
1, 2, 3, 焦泽辉
1, 2, 3, 于慧臣
1, 2, 3, authorsList=武亮亮, 许瑞达, 焦泽辉, 于慧臣, authorCompany=null, correspAuthors=焦泽辉, 于慧臣, authorNote=null, correspAuthorsNote=
于慧臣(1964—),男,研究员,博士,研究方向为材料的疲劳与断裂,联系地址:北京市81信箱23分箱(100095),E-mail:
yhcyu@126.com, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=x5+Tp72p59zGZDKywpgCyw==, magXml=GUulRq4Vx8UaO8AqdBqUDw==, pdfUrl=null, pdf=MMkJnA4dZ+gus9wtDqYGLA==, pdfFileSize=9260871, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=S4gL12y/dl0ZMirhQf9K2w==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=zB+6Rf04ovzV+jV5woNMWA==, mapNumber=null, fund=null)}, authors=[Author(id=1321935421915902120, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, 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=1321935422020759724, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, authorId=1321935421915902120, language=EN, stringName=Liangliang WU, firstName=Liangliang, middleName=null, lastName=WU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, address=
1.AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China
2.Key Laboratory of Aeronautical Materials Testing and Evaluation,Aero Engine Corporation of China,Beijing 100095,China
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1, 2, 3, address=
1.中国航发北京航空材料研究院,北京 100095
2.中国航空发动机集团材料检测与评价重点实验室,北京 100095
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1, 2, 3, address=
1.AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China
2.Key Laboratory of Aeronautical Materials Testing and Evaluation,Aero Engine Corporation of China,Beijing 100095,China
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1, 2, 3, address=
1.中国航发北京航空材料研究院,北京 100095
2.中国航空发动机集团材料检测与评价重点实验室,北京 100095
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1, 2, 3, address=
1.AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China
2.Key Laboratory of Aeronautical Materials Testing and Evaluation,Aero Engine Corporation of China,Beijing 100095,China
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1, 2, 3, address=
1.中国航发北京航空材料研究院,北京 100095
2.中国航空发动机集团材料检测与评价重点实验室,北京 100095
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1, 2, 3, address=
1.AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China
2.Key Laboratory of Aeronautical Materials Testing and Evaluation,Aero Engine Corporation of China,Beijing 100095,China
3.Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation,Beijing 100095,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1321935422930923714, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, authorId=1321935422733791421, language=CN, stringName=于慧臣, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, address=
1.中国航发北京航空材料研究院,北京 100095
2.中国航空发动机集团材料检测与评价重点实验室,北京 100095
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1.中国航发北京航空材料研究院,北京 100095)]), AuthorCompany(id=1321935419986522273, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, xref=2., ext=[AuthorCompanyExt(id=1321935420162683042, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, companyId=1321935419986522273, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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Morphology of TC4 alloy powder(a),bidirectional scanning strategy(b) and schematic diagram of blanks(c), figureFileSmall=WleKaE7yYirE4q+DLSQc3w==, figureFileBig=S4gL12y/dl0ZMirhQf9K2w==, tableContent=null), ArticleFig(id=1321935424369569996, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图1, caption=
TC4合金粉末形貌(a)、双向扫描策略(b)及毛坯打印示意图(c), figureFileSmall=WleKaE7yYirE4q+DLSQc3w==, figureFileBig=S4gL12y/dl0ZMirhQf9K2w==, tableContent=null), ArticleFig(id=1321935424562507981, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.2, caption=
Microstructure morphologies of SLM TC4 alloy in vertical direction(a)macroscopic morphology;(b)microscopic morphology;(c)inverse pole figure(IPF) maps
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SLM TC4合金垂直方向组织形貌(a)宏观形貌;(b)微观形貌;(c)反极图
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Shape and dimensions of sample(a) and FIB artificial defect morphology(b), figureFileSmall=UhctBn7C9Hqsy51AjWBKYw==, figureFileBig=Xfx2GwgRlJkaO6cuGqAP0Q==, tableContent=null), ArticleFig(id=1321935426420584656, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图3, caption=
试样形状与尺寸(a)及FIB人工缺陷形貌(b), figureFileSmall=UhctBn7C9Hqsy51AjWBKYw==, figureFileBig=Xfx2GwgRlJkaO6cuGqAP0Q==, tableContent=null), ArticleFig(id=1321935426491887825, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.4, caption=
Measurement of crack length 2a, figureFileSmall=/OJ0TJmnUqEHj8uK//vXvA==, figureFileBig=3L1yqA48W+/s+gLgCuRLIQ==, tableContent=null), ArticleFig(id=1321935426600939730, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图4, caption=
裂纹长度2a的测量, figureFileSmall=/OJ0TJmnUqEHj8uK//vXvA==, figureFileBig=3L1yqA48W+/s+gLgCuRLIQ==, tableContent=null), ArticleFig(id=1321935426693214419, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.5, caption=
2a-N data(a) and 2a-N/Nf data(b) of small crack growth for SLM TC4 alloy, figureFileSmall=JdRrLR0PLPgHnTQqrIYctg==, figureFileBig=Ietjqkw87A1h543NY5wsdA==, tableContent=null), ArticleFig(id=1321935426764517588, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图5, caption=
SLM TC4合金小裂纹扩展2a-N数据(a)及小裂纹扩展2a-N/Nf数据(b), figureFileSmall=JdRrLR0PLPgHnTQqrIYctg==, figureFileBig=Ietjqkw87A1h543NY5wsdA==, tableContent=null), ArticleFig(id=1321935426848403669, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.6, caption=
da/dN-2a data of small crack growth for SLM TC4 alloy (a)R=0.1;(b)R=0.5, figureFileSmall=Ig9dp4r3vCNFcNYq+voTvg==, figureFileBig=wQ4q1y7xwAi93NTeMkQOCg==, tableContent=null), ArticleFig(id=1321935426928095446, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图6, caption=
SLM TC4合金小裂纹扩展da/dN-2a数据 (a)R=0.1;(b)R=0.5, figureFileSmall=Ig9dp4r3vCNFcNYq+voTvg==, figureFileBig=wQ4q1y7xwAi93NTeMkQOCg==, tableContent=null), ArticleFig(id=1321935427007787223, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.7, caption=
Small crack growth paths on the right side of mimetic defect (σmax=800 MPa,R=0.1), figureFileSmall=azTKwzNWP+x1aMxrsf/wqA==, figureFileBig=TeocNDpU43/cZox2UzGVLQ==, tableContent=null), ArticleFig(id=1321935427083284696, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图7, caption=
模拟缺陷右侧小裂纹扩展路径(σmax=800 MPa,R=0.1), figureFileSmall=azTKwzNWP+x1aMxrsf/wqA==, figureFileBig=TeocNDpU43/cZox2UzGVLQ==, tableContent=null), ArticleFig(id=1321935427162976473, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.8, caption=
Small crack growth paths(a)region a1;(b)region a2;(c)region a3;(d),(e)region a4;(f)region a5
, figureFileSmall=s7zrk+wEoTCoRIm9xd6KkA==, figureFileBig=lEEWdpckVp2vZdoYIOapow==, tableContent=null), ArticleFig(id=1321935427267834074, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图8, caption=
小裂纹扩展路径(a)a1区;(b)a2区;(c)a3区;(d),(e)a4区;(f)a5区
, figureFileSmall=s7zrk+wEoTCoRIm9xd6KkA==, figureFileBig=lEEWdpckVp2vZdoYIOapow==, tableContent=null), ArticleFig(id=1321935427334942939, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.9, caption=
Small crack growth paths on the left side of mimetic defect(σmax=800 MPa,R=0.1), figureFileSmall=uoj5+sY4pLH69r1E8uohAQ==, figureFileBig=d3ASQgFMdo34sOLWW/5aZA==, tableContent=null), ArticleFig(id=1321935427418829020, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图9, caption=
模拟缺陷左侧小裂纹扩展路径(σmax=800 MPa,R=0.1), figureFileSmall=uoj5+sY4pLH69r1E8uohAQ==, figureFileBig=d3ASQgFMdo34sOLWW/5aZA==, tableContent=null), ArticleFig(id=1321935427519492317, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.10, caption=
Small crack growth paths (a)region b1;(b)region b2;(c)region b3;(d)region b4, figureFileSmall=7hHe5F0E3FtFucJgmO6AAg==, figureFileBig=sKpOa4Id3Sl3tr7F9OUkAw==, tableContent=null), ArticleFig(id=1321935427628544222, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图10, caption=
小裂纹扩展路径 (a)b1区;(b)b2区;(c)b3区;(d)b4区, figureFileSmall=7hHe5F0E3FtFucJgmO6AAg==, figureFileBig=sKpOa4Id3Sl3tr7F9OUkAw==, tableContent=null), ArticleFig(id=1321935427720818911, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.11, caption=
Semi-elliptic crack on sample surface and definition of parameters, figureFileSmall=qB6FG1yOwTOmSeytKNwoDQ==, figureFileBig=epiPp2hxL8oL3dCCGEcskw==, tableContent=null), ArticleFig(id=1321935427804704992, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图11, caption=
半椭圆表面裂纹及各参数含义, figureFileSmall=qB6FG1yOwTOmSeytKNwoDQ==, figureFileBig=epiPp2hxL8oL3dCCGEcskw==, tableContent=null), ArticleFig(id=1321935427901173985, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.12, caption=
Three-dimensional morphologies of small cracks with different lengths 2a(a)initial state;(b)80 μm;(c)130 μm;(d)250 μm;(e)500 μm;(f)800 μm
, figureFileSmall=uQ9rtke5fR5Y1q8kOm7BbQ==, figureFileBig=VlyJfVhDxxtl3j9PeWxatw==, tableContent=null), ArticleFig(id=1321935427976671458, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图12, caption=
小裂纹不同长度2a的三维形貌(a)初始状态;(b)80 μm;(c)130 μm;(d)250 μm;(e)500 μm;(f)800 μm
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da/dN-ΔK data of small crack growth for SLM TC4 alloy(a)R=0.1;(b)R=0.5;(c)R=0.1 and R=0.5
, figureFileSmall=Y6c2HK64J23aOhCmXo8w2g==, figureFileBig=xWOmhpyVh8prVReqKt4yVA==, tableContent=null), ArticleFig(id=1321935428186386660, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图13, caption=
SLM TC4合金小裂纹扩展da/dN-ΔK数据(a)R=0.1;(b)R=0.5;(c)R=0.1与R=0.5
, figureFileSmall=Y6c2HK64J23aOhCmXo8w2g==, figureFileBig=xWOmhpyVh8prVReqKt4yVA==, tableContent=null), ArticleFig(id=1321935428282855653, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Fig.14, caption=
da/dN-ΔK data of long and small crack growth (a)R=0.1;(b)R=0.5, figureFileSmall=wcz3O+7jhoM9Scgh2/JhKA==, figureFileBig=dlFAJl7VIjAKZE4JE/h+UA==, tableContent=null), ArticleFig(id=1321935428366741734, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=图14, caption=
长裂纹与小裂纹扩展da/dN-ΔK数据 (a)R=0.1;(b)R=0.5, figureFileSmall=wcz3O+7jhoM9Scgh2/JhKA==, figureFileBig=dlFAJl7VIjAKZE4JE/h+UA==, tableContent=null), ArticleFig(id=1321935428509348071, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Table 1, caption=
Normal and actual chemical compositions of TC4 powder (mass fraction/%)
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Chemical composition | Al | V | Fe | O | C | N | H | Y | Si | Ti |
|---|
| Normal | 5.6-6.5 | 3.4-4.5 | ≤0.25 | 0.08-0.13 | ≤0.05 | ≤0.03 | ≤0.0125 | ≤0.005 | ≤0.1 | Bal. |
| Actual | 6.29 | 3.99 | 0.2 | 0.12 | 0.009 | 0.02 | 0.002 | <0.005 | 0.031 | Bal. |
), ArticleFig(id=1321935428584845544, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=CN, label=表1, caption=
TC4合金粉末标准与实测化学成分(质量分数/%)
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Chemical composition | Al | V | Fe | O | C | N | H | Y | Si | Ti |
|---|
| Normal | 5.6-6.5 | 3.4-4.5 | ≤0.25 | 0.08-0.13 | ≤0.05 | ≤0.03 | ≤0.0125 | ≤0.005 | ≤0.1 | Bal. |
| Actual | 6.29 | 3.99 | 0.2 | 0.12 | 0.009 | 0.02 | 0.002 | <0.005 | 0.031 | Bal. |
), ArticleFig(id=1321935428656148713, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935414638784639, language=EN, label=Table 2, caption=
Test conditions and fatigue life
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| Specimen number | Maximum stress,σmax/MPa | Stress ratio,R | Fatigue life,Nf/cycle | Crack initiation life,Ni/cycle | (Ni/Nf)/% |
|---|
| S1 | 800 | 0.1 | 124288 | 6013 | 4.8 |
| S2 | 800 | 0.5 | 729731 | 73053 | 10.0 |
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实验条件与疲劳寿命
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| Specimen number | Maximum stress,σmax/MPa | Stress ratio,R | Fatigue life,Nf/cycle | Crack initiation life,Ni/cycle | (Ni/Nf)/% |
|---|
| S1 | 800 | 0.1 | 124288 | 6013 | 4.8 |
| S2 | 800 | 0.5 | 729731 | 73053 | 10.0 |
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