陶瓷丸喷丸强化对激光增材制造TC18钛合金疲劳性能的影响
Effect of Ceramic Shot Peening on Fatigue Properties of TC18 TitaniumAlloy by Laser Additive Manufacturing
摘 要
对激光增材制造成形TC18钛合金进行陶瓷丸喷丸强化，研究了喷丸强度对其表面形貌、表面粗糙度、表层残余压应力、硬度和疲劳性能的影响。结果表明：随着喷丸强度的提高，合金表面加工痕迹逐渐消失但弹坑变得明显，表面粗糙度和残余压应力均增大；喷丸强化可以提高合金的硬度和弹性模量；随着喷丸强度的提高，合金疲劳寿命先增大后减小，疲劳裂纹源先从表面向材料内部转移，后回到表层；0.20～0.25 mm喷丸强度试样的疲劳寿命最高。
增材制造
TC18钛合金
残余压应力
疲劳性能
shot peening
additive manufacturing
TC18 titanium alloy
residual compressive stress
fatigue performance
Abstract
Ceramic shot peening was performed on TC18 titanium alloy formed by laser additive manufacturing, and effects of shot peening intensity on the surface morphology, surface roughness, surface residual compressive stress, hardness and fatigue properties were studied. The results show that with the increase of shot peening intensity, the alloy surface processing traces gradually disappeared, but the craters became obvious, and the surface roughness and residual compressive stress increased. Shot peening improved the hardness and elastic modulus of the alloy. As the shot peening intensity increased, the fatigue life of the alloy increased first and then decreased, and the fatigue cracks source first transferred to the inside from the surface of the material and then returned to the surface. The fatigue life of the sample with 0.20-0.25 mm shot peening intensity was the highest.
中图分类号 TG178 DOI 10.11973/jxgccl202011016
所属栏目 专题报道(增材制造技术)
基金项目
收稿日期 2020/6/5
修改稿日期 2020/9/17
网络出版日期
作者单位点击查看
备注冯抗屯(1964-),男,陕西渭南人,研究员级高级工程师,学士
引用该论文: FENG Kangtun,ZHAI Jiayou,YANG Kai,ZHANG Pingze,GAO Di. Effect of Ceramic Shot Peening on Fatigue Properties of TC18 TitaniumAlloy by Laser Additive Manufacturing[J]. Materials for mechancial engineering, 2020, 44(11): 92～96
冯抗屯,翟甲友,杨凯,张平则,高頔. 陶瓷丸喷丸强化对激光增材制造TC18钛合金疲劳性能的影响[J]. 机械工程材料, 2020, 44(11): 92～96
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参考文献
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【3】何杉, 杨清, 闵祥禄. 喷丸强化对TC17钛合金疲劳性能的影响[J]. 金属热处理, 2018,43(6): 159-161.
【4】朱晨, 姜传海. 17Cr2Ni2Mo钢的表面复合喷丸强化[J]. 机械工程材料, 2011, 35(9): 98-99.
【5】王仁智. 金属材料的喷丸强化原理及其强化机理综述[J]. 中国表面工程, 2012, 25(6): 1-9.
【6】高玉魁.陶瓷丸在喷丸强化中的发展与应用[J].金属加工(热加工),2008(1):59-60.
【7】何少杰,杨文玉,郭步鹏,等.机加工表面残余应力及其疲劳寿命评价的研究进展[J].表面技术,2015,44(6):120-126.
【8】高玉魁. TC18超高强度钛合金喷丸残余压应力场的研究[J]. 稀有金属材料与工程, 2004, 33(11): 1209-1212.
【9】YAO C F,WU D X,MA L F,et al. Surface integrity evolution and fatigue evaluation after milling mode,shot-peening and polishing mode for TB6 titanium alloy[J].Applied Surface Science,2016,387:1257-1264.
【10】ALMANGOUR B,YANG J M. Improving the surface quality and mechanical properties by shot-peening of 17-4 stainless steel fabricated by additive manufacturing[J].Materials & Design,2016,110:914-924.
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