Article(id=1198550348827816685, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550344985837722, articleNumber=1009-5438(2023)05-0088-06, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1692201600000, receivedDateStr=2023-08-17, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763686271148, onlineDateStr=2025-11-21, pubDate=1698163200000, pubDateStr=2023-10-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763686271148, onlineIssueDateStr=2025-11-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763686271148, creator=13701087609, updateTime=1763686271148, updator=13701087609, issue=Issue{id=1198550344985837722, tenantId=1146029695717560320, journalId=1185652524569653253, year='2023', volume='49', issue='5', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763686270233, creator=13701087609, updateTime=1764231160152, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200835779015602647, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550344985837722, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200835779015602648, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550344985837722, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=88, endPage=93, ext={EN=ArticleExt(id=1198550349771535106, articleId=1198550348827816685, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Comparative Analysis on National Standard Method and Actual Measurement Method for Δ
Kth of Rail, columnId=1187102804364640261, journalTitle=Science & Technology of Baotou Steel, columnName=Others, runingTitle=null, highlight=null, articleAbstract=
The hardness of hardened layer for rails after quenching is with hardness gradient and it is difficult to accurately calculate the threshold value ΔKth of fatigue crack growth for rails. In the paper, the detection of threshold value ΔKth is carried out through software optimization based on the fatigue crack growth software. The threshold values ΔKth of U75V and U71Mn quenched rails with different stress ratios are obtained by national standard method and actual measurement method respectively. As a result, the threshold values ΔKth of quenched rails obtained by actual measurement method are more accurate through comparative analysis of data.
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Kth国标法与实测法对比分析, columnId=1185882040642716431, journalTitle=包钢科技, columnName=其他, runingTitle=null, highlight=null, articleAbstract=
钢轨经淬火后,获得的硬化层硬度有硬度梯度,通过国标法很难准确地计算出其疲劳裂纹扩展门槛值ΔKth。文章在fatigue crack growth软件的基础上,通过软件优化解决门槛值ΔKth的检测。对不同应力比下U75V、U71Mn淬火钢轨分别利用国标法和实测法获得门槛值ΔKth,通过数据对比分析,对于淬火钢轨使用实测法更能准确地确定其门槛值ΔKth。
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贾鹏霞(1987-),女,内蒙古乌兰察布市人,工程师,现从事金属材料物理性能检测研究工作。
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贾鹏霞(1987-),女,内蒙古乌兰察布市人,工程师,现从事金属材料物理性能检测研究工作。
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贾鹏霞(1987-),女,内蒙古乌兰察布市人,工程师,现从事金属材料物理性能检测研究工作。
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焊管,
2014,
37(3):8-13., articleTitle=一种X80管线钢焊接接头疲劳裂纹扩展门槛值的研究, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1198570137268879730, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, xref=null, ext=[AuthorCompanyExt(id=1198570137277268339, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, companyId=1198570137268879730, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1198570137285656948, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, companyId=1198570137268879730, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010)])], figs=[ArticleFig(id=1198570141047947765, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=EN, label=null, caption=null, figureFileSmall=PpDWWnC7R5xB/uWjO5hYsw==, figureFileBig=sUKLQhHMx5jgYyCZ1jBmWQ==, tableContent=null), ArticleFig(id=1198570141123445241, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=CN, label=图1, caption=
试样尺寸, figureFileSmall=PpDWWnC7R5xB/uWjO5hYsw==, figureFileBig=sUKLQhHMx5jgYyCZ1jBmWQ==, tableContent=null), ArticleFig(id=1198570141219914238, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=EN, label=null, caption=null, figureFileSmall=9ofk/KH/d8xzxjaRBPHrXg==, figureFileBig=GjGm9hLJy37AQPzeIgaZqw==, tableContent=null), ArticleFig(id=1198570141307994624, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=CN, label=图2, caption=
实测ΔKth值显示结果, figureFileSmall=9ofk/KH/d8xzxjaRBPHrXg==, figureFileBig=GjGm9hLJy37AQPzeIgaZqw==, tableContent=null), ArticleFig(id=1198570141417046530, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=EN, label=null, caption=null, figureFileSmall=vQ3C924aYxHQRofMNRiqEw==, figureFileBig=TrGToc7EgVfQO23HAQzHmQ==, tableContent=null), ArticleFig(id=1198570141500932613, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=CN, label=图3, caption=
U75V不同应力比门槛值变化趋势图, figureFileSmall=vQ3C924aYxHQRofMNRiqEw==, figureFileBig=TrGToc7EgVfQO23HAQzHmQ==, tableContent=null), ArticleFig(id=1198570141618373130, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=EN, label=null, caption=null, figureFileSmall=0YYCkNbv0X4GFMtfRjb0og==, figureFileBig=BHIu/IYO2kxkkY0Kn3Y89g==, tableContent=null), ArticleFig(id=1198570141710647824, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=CN, label=图4, caption=
U71Mn不同应力比门槛值变化趋势图, figureFileSmall=0YYCkNbv0X4GFMtfRjb0og==, figureFileBig=BHIu/IYO2kxkkY0Kn3Y89g==, tableContent=null), ArticleFig(id=1198570141798728210, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Crack length/mm | Cycles/N | ΔK/(N·mm-3/2) | da/dN/(mm·cycles-1) | lg(ΔK) | lg(da/dN) |
| 20.77 | 4 446 439 | 211.793 | 2.169×10-7 | 2.325 9 | -6.663 7 |
| 20.63 | 3 385 636 | 213.123 | 2.326×10-7 | 2.328 6 | -6.633 4 |
| 20.51 | 2 831 223 | 216.887 | 2.749×10-7 | 2.336 2 | -6.560 8 |
| 20.43 | 2 473 434 | 219.126 | 3.213×10-7 | 2.340 7 | -6.493 1 |
| 20.05 | 1 954 121 | 221.541 | 3.445×10-7 | 2.345 5 | -6.462 8 |
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U75V淬火轨疲劳裂纹扩展门槛值测量数据统计和计算结果
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| Crack length/mm | Cycles/N | ΔK/(N·mm-3/2) | da/dN/(mm·cycles-1) | lg(ΔK) | lg(da/dN) |
| 20.77 | 4 446 439 | 211.793 | 2.169×10-7 | 2.325 9 | -6.663 7 |
| 20.63 | 3 385 636 | 213.123 | 2.326×10-7 | 2.328 6 | -6.633 4 |
| 20.51 | 2 831 223 | 216.887 | 2.749×10-7 | 2.336 2 | -6.560 8 |
| 20.43 | 2 473 434 | 219.126 | 3.213×10-7 | 2.340 7 | -6.493 1 |
| 20.05 | 1 954 121 | 221.541 | 3.445×10-7 | 2.345 5 | -6.462 8 |
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| Crack length/mm | Cycles/N | ΔK/(N·mm-3/2) | da/dN/(mm·cycles-1) | lg(ΔK) | lg(da/dN) |
| 24.16 | 3 724 188 | 208.59 | 2.109×10-7 | 2.319 3 | -6.675 9 |
| 24.22 | 4 357 721 | 207.02 | 1.878×10-7 | 2.316 0 | -6.726 3 |
| 24.41 | 5 802 580 | 204.91 | 1.641×10-7 | 2.311 6 | -6.784 9 |
| 24.48 | 6 282 581 | 202.55 | 1.534×10-7 | 2.306 5 | -6.814 2 |
| 24.56 | 7 061 981 | 200.16 | 1.395×10-7 | 2.301 4 | -6.855 4 |
| 24.61 | 8 399 830 | 199.45 | 1.301×10-7 | 2.299 8 | -6.885 7 |
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U71Mn淬火轨疲劳裂纹扩展门槛值测量数据统计和计算结果
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| Crack length/mm | Cycles/N | ΔK/(N·mm-3/2) | da/dN/(mm·cycles-1) | lg(ΔK) | lg(da/dN) |
| 24.16 | 3 724 188 | 208.59 | 2.109×10-7 | 2.319 3 | -6.675 9 |
| 24.22 | 4 357 721 | 207.02 | 1.878×10-7 | 2.316 0 | -6.726 3 |
| 24.41 | 5 802 580 | 204.91 | 1.641×10-7 | 2.311 6 | -6.784 9 |
| 24.48 | 6 282 581 | 202.55 | 1.534×10-7 | 2.306 5 | -6.814 2 |
| 24.56 | 7 061 981 | 200.16 | 1.395×10-7 | 2.301 4 | -6.855 4 |
| 24.61 | 8 399 830 | 199.45 | 1.301×10-7 | 2.299 8 | -6.885 7 |
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| 试样材质 | 编号 | R | 材料 系数n1 | lgC1 /(m·cycle-1) | 相关 系数 | n1平均值 | lgC1平均值 /(m·cycle-1) | ΔKth计算值 /(N·mm-3/2) | ΔKth平均值 /(N·mm-3/2) |
| U75V | 1-1 | 0.1 | 11.423 | -33.23 | 0.990 1 | 11.40 | -33.19 | 219.12 | 218.00 |
| 1-2 | 11.382 | -33.15 | 0.989 2 | 216.89 |
| 1-3 | 0.3 | 10.928 | -32.07 | 0.987 1 | 10.92 | -32.06 | 213.13 | 215.34 |
| 1-4 | 10.909 | -32.04 | 0.991 3 | 217.54 |
| 1-5 | 0.5 | 10.584 | -31.28 | 0.990 8 | 10.50 | -31.12 | 214.04 | 212.96 |
| 1-6 | 10.425 | -30.97 | 0.980 8 | 211.89 |
| 1-7 | 0.8 | 9.328 | -28.39 | 0.984 1 | 9.31 | -28.34 | 212.22 | 210.79 |
| 1-8 | 9.296 | -28.29 | 0.981 0 | 209.36 |
| U71Mn | 2-1 | 0.1 | 10.316 | -30.54 | 0.990 8 | 10.28 | -30.48 | 207.55 | 208.07 |
| 2-2 | 10.241 | -30.43 | 0.988 6 | 208.59 |
| 2-3 | 0.3 | 9.913 | -29.68 | 0.991 2 | 9.91 | -29.68 | 207.02 | 205.96 |
| 2-4 | 9.908 | -29.69 | 0.992 4 | 204.91 |
| 2-5 | 0.5 | 9.324 | -28.32 | 0.991 7 | 9.34 | -28.35 | 202.55 | 201.36 |
| 2-6 | 9.351 | -28.37 | 0.989 7 | 200.16 |
| 2-7 | 0.8 | 8.692 | -26.88 | 0.989 3 | 8.61 | -26.86 | 199.45 | 199.31 |
| 2-8 | 8.531 | -26.85 | 0.991 1 | 199.17 |
), ArticleFig(id=1198570143379980836, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=CN, label=表3, caption=
国标GB/T 6398—2000方法计算门槛值ΔKth
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| 试样材质 | 编号 | R | 材料 系数n1 | lgC1 /(m·cycle-1) | 相关 系数 | n1平均值 | lgC1平均值 /(m·cycle-1) | ΔKth计算值 /(N·mm-3/2) | ΔKth平均值 /(N·mm-3/2) |
| U75V | 1-1 | 0.1 | 11.423 | -33.23 | 0.990 1 | 11.40 | -33.19 | 219.12 | 218.00 |
| 1-2 | 11.382 | -33.15 | 0.989 2 | 216.89 |
| 1-3 | 0.3 | 10.928 | -32.07 | 0.987 1 | 10.92 | -32.06 | 213.13 | 215.34 |
| 1-4 | 10.909 | -32.04 | 0.991 3 | 217.54 |
| 1-5 | 0.5 | 10.584 | -31.28 | 0.990 8 | 10.50 | -31.12 | 214.04 | 212.96 |
| 1-6 | 10.425 | -30.97 | 0.980 8 | 211.89 |
| 1-7 | 0.8 | 9.328 | -28.39 | 0.984 1 | 9.31 | -28.34 | 212.22 | 210.79 |
| 1-8 | 9.296 | -28.29 | 0.981 0 | 209.36 |
| U71Mn | 2-1 | 0.1 | 10.316 | -30.54 | 0.990 8 | 10.28 | -30.48 | 207.55 | 208.07 |
| 2-2 | 10.241 | -30.43 | 0.988 6 | 208.59 |
| 2-3 | 0.3 | 9.913 | -29.68 | 0.991 2 | 9.91 | -29.68 | 207.02 | 205.96 |
| 2-4 | 9.908 | -29.69 | 0.992 4 | 204.91 |
| 2-5 | 0.5 | 9.324 | -28.32 | 0.991 7 | 9.34 | -28.35 | 202.55 | 201.36 |
| 2-6 | 9.351 | -28.37 | 0.989 7 | 200.16 |
| 2-7 | 0.8 | 8.692 | -26.88 | 0.989 3 | 8.61 | -26.86 | 199.45 | 199.31 |
| 2-8 | 8.531 | -26.85 | 0.991 1 | 199.17 |
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| 编号 | R | 实测ΔKth /(N·mm-3/2) | ΔKth平均值 /(N·mm-3/2) |
| 1-1 | 0.1 | 223.36 | 221.32 |
| 1-2 | 219.28 |
| 1-3 | 0.3 | 218.41 | 219.31 |
| 1-4 | 220.21 |
| 1-5 | 0.5 | 218.35 | 216.91 |
| 1-6 | 215.47 |
| 1-7 | 0.8 | 213.81 | 214.72 |
| 1-8 | 215.64 |
), ArticleFig(id=1198570143530975786, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=CN, label=表4, caption=
MTS实测法U75V淬火轨门槛值ΔKth
, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | R | 实测ΔKth /(N·mm-3/2) | ΔKth平均值 /(N·mm-3/2) |
| 1-1 | 0.1 | 223.36 | 221.32 |
| 1-2 | 219.28 |
| 1-3 | 0.3 | 218.41 | 219.31 |
| 1-4 | 220.21 |
| 1-5 | 0.5 | 218.35 | 216.91 |
| 1-6 | 215.47 |
| 1-7 | 0.8 | 213.81 | 214.72 |
| 1-8 | 215.64 |
), ArticleFig(id=1198570143627444782, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | R | 实测ΔKth /(N·mm-3/2) | ΔKth平均值 /(N·mm-3/2) |
| 2-1 | 0.1 | 211.52 | 210.82 |
| 2-2 | 210.13 |
| 2-3 | 0.3 | 208.14 | 207.50 |
| 2-4 | 206.86 |
| 2-5 | 0.5 | 205.59 | 204.74 |
| 2-6 | 203.89 |
| 2-7 | 0.8 | 201.47 | 201.95 |
| 2-8 | 202.43 |
), ArticleFig(id=1198570143728108082, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=CN, label=表5, caption=
MTS实测法U71Mn淬火轨门槛值ΔKth
, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | R | 实测ΔKth /(N·mm-3/2) | ΔKth平均值 /(N·mm-3/2) |
| 2-1 | 0.1 | 211.52 | 210.82 |
| 2-2 | 210.13 |
| 2-3 | 0.3 | 208.14 | 207.50 |
| 2-4 | 206.86 |
| 2-5 | 0.5 | 205.59 | 204.74 |
| 2-6 | 203.89 |
| 2-7 | 0.8 | 201.47 | 201.95 |
| 2-8 | 202.43 |
), ArticleFig(id=1198570143786828342, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 试样材质 | 编号 | R | 国标法 | | 实测法 | 国标法与 实测法差值 /(N·mm-3/2) |
计算ΔKth /(N·mm-3/2) | ΔKth平均值 /(N·mm-3/2) | 实测ΔKth /(N·mm-3/2) | ΔKth平均 /(N·mm-3/2) |
| U75V | 1-1 | 0.1 | 219.12 | 218.00 | | 223.36 | 221.32 | -3.32 |
| 1-2 | 216.89 | 219.28 |
| 1-3 | 0.3 | 213.13 | 215.34 | 218.41 | 219.31 | -3.97 |
| 1-4 | 217.54 | 220.21 | |
| 1-5 | 0.5 | 214.04 | 212.96 | 218.35 | 216.91 | -3.95 |
| 1-6 | 211.89 | 215.47 | |
| 1-7 | 0.8 | 212.22 | 210.79 | 213.81 | 214.72 | -3.93 |
| 1-8 | 209.36 | 215.64 | |
| U71Mn | 2-1 | 0.1 | 207.55 | 208.07 | | 211.52 | 210.82 | -2.75 |
| 2-2 | 208.59 | 210.13 |
| 2-3 | 0.3 | 207.02 | 205.96 | 208.14 | 207.50 | -1.54 |
| 2-4 | 204.91 | 206.86 | |
| 2-5 | 0.5 | 202.55 | 201.36 | 205.59 | 204.74 | -3.38 |
| 2-6 | 200.16 | 203.89 | |
| 2-7 | 0.8 | 199.45 | 199.31 | 201.47 | 201.95 | -2.64 |
| 2-8 | 199.17 | 202.43 | |
), ArticleFig(id=1198570143862325818, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550348827816685, language=CN, label=表6, caption=
国标法计算门槛值与实测法测定门槛值对比
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| 试样材质 | 编号 | R | 国标法 | | 实测法 | 国标法与 实测法差值 /(N·mm-3/2) |
计算ΔKth /(N·mm-3/2) | ΔKth平均值 /(N·mm-3/2) | 实测ΔKth /(N·mm-3/2) | ΔKth平均 /(N·mm-3/2) |
| U75V | 1-1 | 0.1 | 219.12 | 218.00 | | 223.36 | 221.32 | -3.32 |
| 1-2 | 216.89 | 219.28 |
| 1-3 | 0.3 | 213.13 | 215.34 | 218.41 | 219.31 | -3.97 |
| 1-4 | 217.54 | 220.21 | |
| 1-5 | 0.5 | 214.04 | 212.96 | 218.35 | 216.91 | -3.95 |
| 1-6 | 211.89 | 215.47 | |
| 1-7 | 0.8 | 212.22 | 210.79 | 213.81 | 214.72 | -3.93 |
| 1-8 | 209.36 | 215.64 | |
| U71Mn | 2-1 | 0.1 | 207.55 | 208.07 | | 211.52 | 210.82 | -2.75 |
| 2-2 | 208.59 | 210.13 |
| 2-3 | 0.3 | 207.02 | 205.96 | 208.14 | 207.50 | -1.54 |
| 2-4 | 204.91 | 206.86 | |
| 2-5 | 0.5 | 202.55 | 201.36 | 205.59 | 204.74 | -3.38 |
| 2-6 | 200.16 | 203.89 | |
| 2-7 | 0.8 | 199.45 | 199.31 | 201.47 | 201.95 | -2.64 |
| 2-8 | 199.17 | 202.43 | |
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