| 不同加载频率下GCr15钢超高周疲劳行为的研究 |
| |
| 引用本文： | 李伟,李强,鲁连涛,王平.不同加载频率下GCr15钢超高周疲劳行为的研究[J].材料热处理学报,2008(6). |
| |
| 作者姓名： | 李伟 李强 鲁连涛 王平 |
| |
| 作者单位： | 北京交通大学结构强度检测国家级认证中心;西南交通大学牵引动力国家重点实验室;山东省科学院海洋仪器仪表研究所; |
| |
| 基金项目： | 国家自然科学基金(5047104750671086); 国家973计划项目(2007CB714705) |
| |
| 摘 要： | 分别采用常规和超声疲劳的试验方法,结合断裂力学理论以及FRASTA仿真,开展了GCr15钢超高周疲劳破坏行为的研究。结果表明,根据裂纹萌生位置的不同,疲劳破坏分为表面和内部破坏两种,其中内部破坏伴有granular bright facet(GBF)现象的产生,整个内部裂纹具有Fish-eye形貌特征。材料的疲劳S-N曲线呈现持续下降的趋势,ΔKGBF(4～4.2MPa·m1/2)是控制内部裂纹扩展的临界参数,超声疲劳试验提高了材料的疲劳强度,高强度钢的超高周疲劳行为的研究应采用常规试验为主,超声为辅的试验方法。
|
| 关 键 词： | GCr15钢 超高周疲劳 S-N曲线 GBF 裂纹 |
Research on the very high cycle fatigue behavior of GCr15 steel in different load frequency |
| |
| LI Wei,LI Qiang,LU Lian-tao,WANG Ping.Research on the very high cycle fatigue behavior of GCr15 steel in different load frequency[J].Transactions of Materials and Heat Treatment,2008(6). |
| |
| Authors: | LI Wei LI Qiang LU Lian-tao WANG Ping |
| |
| Affiliation: | LI Wei1,LI Qiang1,LU Lian-tao2,WANG Ping3(1.Laboratory for Structural Strength Testing,Beijing Jiaotong University,China National Accreditation Service for Conformity Assessment,Beijing 100044,China,2.State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,3.Institute of Oceanographic Instrumentation,Sh,ong Academy of Sciences,Qingdao 266001,China) |
| |
| Abstract: | The very high cycle fatigue fracture behavior of GCr15 steel was researched by the method of conventional fatigue test and ultrasonic fatigue test respectively,combining with fracture mechanics theory and the simulation of FRASTA.The test results show that fatigue fracture is divided into the surface fracture mode and interior fracture mode according to the difference of crack initiation position.The phenomenon of granular bright facet(GBF) appears in the interior fracture mode,and the entire interior crack... |
| |
| Keywords: | GCr15 steel very high cycle fatigue S-N curve granular bright facet(GBF) crack |
| 本文献已被 CNKI 等数据库收录！ |
|
