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激光冲击对TC11钛合金组织和力学性能的影响

聂祥樊 何卫锋 臧顺来 王学德 李玉琴 柴艳

聂祥樊, 何卫锋, 臧顺来, 王学德, 李玉琴, 柴艳. 激光冲击对TC11钛合金组织和力学性能的影响[J]. 航空动力学报, 2014, 29(2): 321-327. doi: 10.13224/j.cnki.jasp.2014.02.011
引用本文: 聂祥樊, 何卫锋, 臧顺来, 王学德, 李玉琴, 柴艳. 激光冲击对TC11钛合金组织和力学性能的影响[J]. 航空动力学报, 2014, 29(2): 321-327. doi: 10.13224/j.cnki.jasp.2014.02.011
NIE Xiang-fan, HE Wei-feng, ZANG Shun-lai, WANG Xue-de, LI Yu-qin, CHAI Yan. Effects on structure and mechanical properties of TC11 titanium alloy by laser shock peening[J]. Journal of Aerospace Power, 2014, 29(2): 321-327. doi: 10.13224/j.cnki.jasp.2014.02.011
Citation: NIE Xiang-fan, HE Wei-feng, ZANG Shun-lai, WANG Xue-de, LI Yu-qin, CHAI Yan. Effects on structure and mechanical properties of TC11 titanium alloy by laser shock peening[J]. Journal of Aerospace Power, 2014, 29(2): 321-327. doi: 10.13224/j.cnki.jasp.2014.02.011

激光冲击对TC11钛合金组织和力学性能的影响

doi: 10.13224/j.cnki.jasp.2014.02.011
基金项目: 国家自然科学基金(51205406);西安市科技计划项目(CXY116(4))

Effects on structure and mechanical properties of TC11 titanium alloy by laser shock peening

  • 摘要: 对TC11钛合金进行激光冲击强化处理,通过透射电子显微镜观察不同参数下TC11钛合金的微观组织变化,用显微硬度计和X射线应力测试仪分别测试材料表层硬度和残余应力,并通过TC11钛合金标准疲劳试片高周振动疲劳试验验证激光冲击对其疲劳性能的影响.试验结果表明:激光冲击波作用后表面组织结构发生明显变化,当冲击次数增加,先后出现了高密度位错、位错胞和纳米级晶粒等微观组织特征.冲击10次后,表面残余应力最高达到-632.5MPa,相应的塑性变形层深度达到1500μm左右;同时表面硬度在冲击1次即可提高19%,硬度影响深度为700μm,随着次数增加而提高,但幅度不大.经3次冲击处理的TC11钛合金标准疲劳试片的疲劳极限由原始483MPa提高到593MPa.

     

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  • 收稿日期:  2012-12-16
  • 刊出日期:  2014-02-28

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