菱形加载路径下35CrMoA钢的微动疲劳行为

采用MTS809拉扭复合疲劳试验机、扫描电镜（SEM）研究了接触应力为150MPa时35CrMoA合金钢在菱形加载路径下微动疲劳性能。结果表明：随着等效应力幅值的增加,材料的软化、硬化效果更加明显;剪应力-剪应变滞后回线的面积增大;裂纹萌生源区的面积减小,瞬断区面积与总断面面积的比例增加,瞬断区的撕裂也越严重。微动磨损使表面塑性枯竭,从而形成疲劳裂纹源。...

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Bibliographic Details
Published in材料工程 Vol. 44; no. 1; pp. 96 - 102
Main Author 吕世泉 何国球 沈月 田丹丹 刘晓山 林国斌 任敬东 胡杰
Format Journal Article
LanguageChinese
Published 同济大学材料科学与工程学院上海市金属功能材料开发应用重点实验室,上海,201804%同济大学磁浮交通工程技术研究中心,上海,201804 2016
Subjects
35CrMoA
微动疲劳
断口形貌
等效应力幅值
菱形加载
裂纹源
diamond loading
fretting fatigue
菱形加载
微动疲劳
裂纹源
equivalent stress amplitude
crack initiation
fracture morphology
35CrMoA
等效应力幅值
断口形貌
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Summary:采用MTS809拉扭复合疲劳试验机、扫描电镜（SEM）研究了接触应力为150MPa时35CrMoA合金钢在菱形加载路径下微动疲劳性能。结果表明：随着等效应力幅值的增加,材料的软化、硬化效果更加明显;剪应力-剪应变滞后回线的面积增大;裂纹萌生源区的面积减小,瞬断区面积与总断面面积的比例增加,瞬断区的撕裂也越严重。微动磨损使表面塑性枯竭,从而形成疲劳裂纹源。
Bibliography:11-1800/TB
The stress controlled fretting fatigue behavior of 35 CrMoA steel under the diamond loading condition was investigated at the contact stress of 150 MPa by MTS809axial/torsional test system and SEM.The results indicate that,with the increase of equivalent stress amplitude,the extent of softening and hardening becomes pronounced;the area of shear stress-strain hysteresis loop increases;the area of crack initiation decreases,the proportion of final fracture in fracture surface region increases,the degree of tearing becomes more serious.The plasticity is exhausted and easy to form crack initiation as a result of fretting wear.
35CrMoA; diamond loading; fretting fatigue; equivalent stress amplitude; fracture morphology; crack initiation
LYU Shi-quan,HE Guo-qiu,SHEN Yue,TIAN Dan-dan,LIU Xiao-shan,LIN Guo-bin,REN Jing-dong,HU Jie （1. Shanghai Key Laboratory for R＆D and Application of Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China; 2 Magne
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2016.01.015