| 400 MPa级薄钢板的疲劳性能及断口分析 |
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| 引用本文： | 高彩茹,杜林秀,张福波,刘相华,王国栋.400 MPa级薄钢板的疲劳性能及断口分析[J].钢铁研究学报,2008,20(8):50-0. |
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| 作者姓名： | 高彩茹 杜林秀 张福波 刘相华 王国栋 |
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| 作者单位： | 东北大学轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，辽宁省科技攻关项目 |
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| 摘 要： | 利用液压伺服疲劳实验机研究了400 MPa级板带在对称循环应力下的高周疲劳性能，测量了S N曲线，确定了应力幅低于疲劳强度时疲劳寿命与应力幅之间的关系式；用扫描电镜观察该钢的疲劳断口，分析了疲劳断裂特点；在透射电镜下观察了断口附近的微观组织，并对其疲劳断裂机理进行了分析，结果表明：疲劳裂纹起源于表面驻留滑移带挤出脊、侵入沟或表面缺陷，裂纹源扩展最终导致断裂。
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| 关 键 词： | 薄钢板 疲劳性能 断裂机理 |
| 收稿时间： | 1900-01-01; |
Fatigue Performance of 400 MPa Thin Plate Steel and Analysis of Fracture |
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| GAO Cai-ru,DU Lin-xiu,ZHANG Fu-bo,LIU Xiang-hua,WANG Guo-dong.Fatigue Performance of 400 MPa Thin Plate Steel and Analysis of Fracture[J].Journal of Iron and Steel Research,2008,20(8):50-0. |
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| Authors: | GAO Cai-ru DU Lin-xiu ZHANG Fu-bo LIU Xiang-hua WANG Guo-dong |
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| Affiliation: | State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China |
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| Abstract: | Using hydraulic servo fatigue testing machine, the high cycle fatigue performance of 400 MPa thin plate steel under symmetrical cycle stress condition was studied. The S N curve and the relation expression were obtained. The fatigue crack feature was analyzed by observing crack profile under SEM. The cracking mechanism was analyzed through observation of microstructure near crack by using TEM. It is concluded that crack originates from surface resident slip band, extrusion spine, intrusion groove or surface flaw, and crack growth results in fracture finally. |
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| Keywords: | thin plate steel fatigue performance crack mechanism |
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