| SMA490BW钢对接接头高周疲劳性能的机理探究 |
| |
| 引用本文： | 何柏林,金辉,张枝森,谢学涛,丁江灏.SMA490BW钢对接接头高周疲劳性能的机理探究[J].材料导报,2018,32(12):2008-2014. |
| |
| 作者姓名： | 何柏林 金辉 张枝森 谢学涛 丁江灏 |
| |
| 作者单位： | 华东交通大学机电与车辆工程学院,南昌,330013 |
| |
| 基金项目： | 国家自然科学基金(51365014)，江西省工业支撑重点项目(20161BBE50072) |
| |
| 摘 要： | 通过设计对比试验系统地分析应力集中、晶粒细化、残余应力等因素对转向架用SMA490BW钢对接接头高周疲劳性能的影响,并得出占据主导作用的因素。借助扫描电镜观察疲劳断口,探究对接接头冲击前后的失效模式。结果表明:经超声冲击或机械打磨处理后,试样的疲劳寿命均得到不同程度的提高。将焊缝余高彻底磨平对接头疲劳寿命的增益效果最为显著,其疲劳寿命相比原始对接接头可提高近百倍。改善应力集中、细化表层晶粒、引入残余压应力对对接接头延寿的贡献占比分别约为58%、29%和13%。对接接头的疲劳失效大多始于焊趾表面,经超声冲击处理后,疲劳裂纹源可能由材料表面转向内部缺陷。
|
| 关 键 词： | 超声冲击(UIT) 高周疲劳 残余应力 晶粒细化 应力集中 失效机理 |
Mechanism of Improving the High Cycle Fatigue Property of SMA490BW Steel Butt Joint |
| |
| HE Bolin,JIN Hui,ZHANG Zhisen,XIE Xuetao and DING Jianghao.Mechanism of Improving the High Cycle Fatigue Property of SMA490BW Steel Butt Joint[J].Materials Review,2018,32(12):2008-2014. |
| |
| Authors: | HE Bolin JIN Hui ZHANG Zhisen XIE Xuetao and DING Jianghao |
| |
| Affiliation: | School of Mechanotronics and Vehicle Engineering, East China Jiaotong University, Nanchang 330013,School of Mechanotronics and Vehicle Engineering, East China Jiaotong University, Nanchang 330013,School of Mechanotronics and Vehicle Engineering, East China Jiaotong University, Nanchang 330013,School of Mechanotronics and Vehicle Engineering, East China Jiaotong University, Nanchang 330013 and School of Mechanotronics and Vehicle Engineering, East China Jiaotong University, Nanchang 330013 |
| |
| Abstract: | |
| |
| Keywords: | ultrasonic impact treatment (UIT) high cycle fatigue residual stress grain refinement stress concentration failure mechanism |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《材料导报》浏览原始摘要信息 |
|
点击此处可从《材料导报》下载全文 |
|
