Article(id=1309475254133687211, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475253038964788, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20250247, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1790132829459, onlineDateStr=2026-09-23, pubDate=1771516800000, pubDateStr=2026-02-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790132829459, onlineIssueDateStr=2026-09-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790132829459, creator=13701087609, updateTime=1790132829459, updator=13701087609, issue=Issue{id=1309475253038964788, tenantId=1146029695717560320, journalId=1189873562199433220, year='2026', volume='', issue='2', pageStart='1', pageEnd='72', issueExtLink='null', onlineDate='null', pubDate='1771516800000', pubDateStr='2026-02-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1790132829198, creator='13701087609', updateTime=1790133031676, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1309476102360367135, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475253038964788, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1309476102360367136, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475253038964788, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=39, endPage=43, ext={EN=ArticleExt(id=1309475254330819500, articleId=1309475254133687211, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Failure Analysis of Fatigue Fracture in an Engine Turbocharger Turbine Shaft, columnId=null, journalTitle=Automobile Technology & Material, columnName=null, runingTitle=null, highlight=null, articleAbstract=

To address the issue of excessive engine exhaust smoke and insufficient power occurring after 275 km of operation in a certain engine turbocharger, a systematic analysis of the failed turbine shaft is conducted using methods such as macroscopic inspection, scanning electron microscopy analysis, metallographic observation, and hardness testing. The results indicate that the turbine shaft fracture is a low-stress, high-cycle fatigue failure under significant stress concentration. The fracture originated from a severely scratched area at the fillet caused by poor grinding processing. The root cause is identified as poor lubrication leading to dry friction between the shaft and bearing, subjecting the bearing to abnormal alternating stress. The study concludes that although the machining defect created a stress concentration source, the abnormal operating condition (dry friction caused by oil shortage) is the primary factor triggering this premature fracture.

, authors=Xiaofen Sun, Yong Gao, Jijun Feng, authorsList=Xiaofen Sun, Yong Gao, Jijun Feng, authorCompany=null, correspAuthors=null, 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=1309475254544729005, articleId=1309475254133687211, tenantId=1146029695717560320, journalId=1189873562199433220, language=CN, title=某发动机增压器涡轮轴早期疲劳断裂失效分析, columnId=1309475253923962934, journalTitle=汽车工艺与材料, columnName=中国汽车工程学会汽车材料分会第24届学术年会优秀论文——材料工艺研究, runingTitle=null, highlight=null, articleAbstract=

为解决某发动机增压器在运行275 km后出现发动机排烟大、动力不足的问题，通过宏观检查、扫描电镜分析、金相组织观察及硬度测试等方法，对失效涡轮轴进行了系统分析。结果表明，涡轮轴断裂属于大应力集中下的低应力高周疲劳断裂，断裂起源于圆角处因磨削加工不良导致的严重磨痕区域，根本原因为润滑不良导致的轴-轴承干摩擦，使轴承受异常交变应力。研究认为，虽然加工缺陷构成了应力集中源，但异常工况（缺油导致的干摩擦）是引发此次早期断裂的主导因素。

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孙晓芬（1987—），女，高级工程师，学士学位，研究方向为失效分析及材料试验。

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孙晓芬（1987—），女，高级工程师，学士学位，研究方向为失效分析及材料试验。

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