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材料导报  2021, Vol. 35 Issue (12): 12114-12118    https://doi.org/10.11896/cldb.20040182
  金属与金属基复合材料 |
喷丸对TB6钛合金疲劳应力集中敏感性的影响
罗学昆1, 赵春玲2, 查小晖2, 郭婧2, 王欣1, 汤智慧1, 宇波1
1 北京航空材料研究院,航空材料先进腐蚀与防护航空重点实验室,北京 100095
2 中国航发湖南动力机械研究所,株洲 412002
Effect of Shot Peening on Fatigue Stress Concentration Sensitivity of TB6 Titanium Alloy
LUO Xuekun1, ZHAO Chunling2, ZHA Xiaohui2, GUO Jing2, WANG Xin1, TANG ZhiHui1, YU Bo1
1 Aviation Key Laboratory of Advanced Corrosion and Protection on Aviation Materials, Beijing Institute of Aeronautical Material, Beijing 100095, China
2 Hunan Aviation Powerplant Research Institute, Aero Engine Corporation of China, Zhuzhou 412002, China
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摘要 针对航空用TB6高强钛合金,本工作研究了应力集中条件下喷丸对其疲劳性能的影响规律。采用旋转弯曲疲劳试验机分别测试了两种应力集中系数的试棒的疲劳寿命及极限,采用扫描电镜分析了疲劳断口,采用MTS试验机测试了试棒的拉伸性能,并采用白光干涉仪测试了试样的表面形貌。结果表明:当应力集中系数由Kt=1提高至Kt=2时,TB6钛合金试棒的疲劳极限从537.5 MPa下降至335.5 MPa,表现出明显的应力集中敏感性。而经过喷丸后,Kt=1和Kt=2的试棒的疲劳极限分别提高了33.5%和22.2%,缺口敏感性下降了48%。喷丸有利于降低TB6钛合金的疲劳应力集中敏感性。
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罗学昆
赵春玲
查小晖
郭婧
王欣
汤智慧
宇波
关键词:  喷丸  钛合金  疲劳极限  应力集中  缺口敏感性    
Abstract: The effect of shot peening on the fatigue performance of aviation TB6 titanium alloy specimens with high strength under stress concentration condition was investigated. The fatigue life/limits, fracture, tensile property and surface morphology were tested by the rotation bending fatigue tester, scanning electron microscopy, MTS tester, and white light interferometer. The results show that the fatigue limit of TB6 titanium alloy decreases from 537.5 MPa to 335.5 MPa as the increase of stress concentration ratio from Kt=1 to Kt=2. The alloy shows high fatigue stress concentration sensitivity. After shot peening, the fatigue limit of specimens with Kt=1 and Kt=2 increases by 33.5% and 22.2%, respectively. The notched sensitivity decreases by 48%. The shot peeing is beneficial to decreasing the fatigue stress concentration sensitivity of TB6 titanium alloy.
Key words:  shot peening    titanium alloy    fatigue limit    stress concentration    notch sensitivity
               出版日期:  2021-06-25      发布日期:  2021-07-01
ZTFLH:  TG668  
  TG115.57  
基金资助: 国家科技重大专项(2017-Ⅶ-0001-0094;J2019-Ⅶ7-0015);中国航发自主创新专项资金项目(CXPT-2018-029)
通讯作者:  luoxuekun1987@163.com   
作者简介:  罗学昆,中国航发北京航空材料研究院高级工程师,2005年9月至2009年6月,在中南大学获得材料科学与工程专业学士学位,2009年9月至2014年7月,在北京航空航天大学获得材料学博士学位。以第一作者在国内外学术期刊上发表论文10余篇,申请国家发明及国防专利23项,其中授权6项,参与编写论著1项和国军标2项。研究工作主要围绕航空金属材料,开展先进表面强化技术、金属表面完整性及疲劳行为的基础研究和应用研究,主持并参研包括国家科技重大专项、民机科研项目、预研项目、型号研制项目、中国航发自主创新专项资金项目等。
引用本文:    
罗学昆, 赵春玲, 查小晖, 郭婧, 王欣, 汤智慧, 宇波. 喷丸对TB6钛合金疲劳应力集中敏感性的影响[J]. 材料导报, 2021, 35(12): 12114-12118.
LUO Xuekun, ZHAO Chunling, ZHA Xiaohui, GUO Jing, WANG Xin, TANG ZhiHui, YU Bo. Effect of Shot Peening on Fatigue Stress Concentration Sensitivity of TB6 Titanium Alloy. Materials Reports, 2021, 35(12): 12114-12118.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20040182  或          http://www.mater-rep.com/CN/Y2021/V35/I12/12114
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