表面激光冲击强化对钛合金超高周弯曲疲劳性能的影响
Effect of Surface Laser Shock Processing on Ultra-high Cycle Bending Fatigue Properties of Titanium Alloy
摘 要
对TC17钛合金进行了表面激光冲击强化处理, 并对其残余应力分布进行了分析, 通过强化前后TC17钛合金的超高周弯曲疲劳性能试验, 疲劳试样断口形貌的观察, 研究了表面激光冲击强化对TC17钛合金的超高周弯曲疲劳性能的影响。结果表明: 经过激光冲击强化处理后, TC17钛合金的疲劳裂纹源从强化前的主要分布在表面和次表面, 全部转移到了次表面, 其超高周弯曲疲劳性能提高了一倍。
激光冲击强化
超高周疲劳
TC17 titanium alloy
laser shock processing
ultra-high cycle fatigue
Abstract
Laser shock processing was carried out on TC17 titanium alloy surface, and the residual stress distribution was analyzed. The influences of laser shock processing on ultra-high bending cycle fatigue properties of TC17 titanium alloy were investigated by means of ultra-high bending cycle fatigue tests for specimens before and after strengthening and observation of fracture morphology of fatigue specimens. The result show that the fatigue cracks appeared in the sub surface of TC17 titanium alloy after laser shock processing, which were distributed in the surface and sub surface before laser shock process, and its ultra-high bending cycle fatigue properties doubled after laser shock processing.
中图分类号 V216.3 DOI 10.11973/jxgccl201508017
所属栏目 材料性能及其应用
基金项目 国家自然科学基金资助项目(51175509)
收稿日期 2014/12/14
修改稿日期 2015/1/25
网络出版日期
作者单位点击查看
备注冯璐璐(1988-),女, 陕西宝鸡人, 硕士研究生。
引用该论文: FENG Lu-lu,LI Quan-tong,YIN Zhi-peng,GAO Xing-wei. Effect of Surface Laser Shock Processing on Ultra-high Cycle Bending Fatigue Properties of Titanium Alloy[J]. Materials for mechancial engineering, 2015, 39(8): 79～82
冯璐璐,李全通,尹志朋,高星伟. 表面激光冲击强化对钛合金超高周弯曲疲劳性能的影响[J]. 机械工程材料, 2015, 39(8): 79～82
被引情况:
【1】王少鹏,乔生儒,张程煜, "表面复合强化处理后Ti17钛合金的显微组织和耐磨性能",机械工程材料 39, 17-21(2015)
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参考文献
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【3】刘文才, 董杰, 翟春泉, 等. 喷丸对高强度变形镁合金ZK60-T5高周疲劳性能的影响［J］. 郑州大学学报, 2009, 30(1): 1-5.
【4】薛红前. 超声振动载荷下材料的超高周疲劳性能研究［D］. 西安: 西北工业大学, 2006.
【5】SHANYAVSKIY A, ARTAMONOV M. Fatigue cracking in high-cycle-fatigue and very-high-cycle-fatigue areas of peened and unpeened Al-based alloys because of fretting damages［J］. Engineering Fracture Mechanics, 2008, 75(3/4): 682-693.
【6】FENG Lu-lu, LI Quan-tong. Research on the model of ultra-high cycle fatigue destruction due to curving vibration after the surface hardening［C］//The 6th International Conference on Very High Cycle Fatigue. Chengdu: ［s.n.］, 2014: 82-84.
【7】李全通, 通旭东, 高星伟, 等. 基于试片超高周疲劳试验的叶片高周疲劳寿命估算方法［J］. 航空动力学报, 2014, 29(10): 2471-2475.
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