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激光冲击AZ31镁合金的腐蚀疲劳特性研究

李兴成 卢雅琳 周金宇 陈菊芳

李兴成, 卢雅琳, 周金宇, 陈菊芳. 激光冲击AZ31镁合金的腐蚀疲劳特性研究[J]. 机械科学与技术, 2015, 34(11): 1779-1783. doi: 10.13433/j.cnki.1003-8728.2015.1125
引用本文: 李兴成, 卢雅琳, 周金宇, 陈菊芳. 激光冲击AZ31镁合金的腐蚀疲劳特性研究[J]. 机械科学与技术, 2015, 34(11): 1779-1783. doi: 10.13433/j.cnki.1003-8728.2015.1125
Li Xingcheng, Lu Yalin, Zhou Jinyu, Chen Jufang. Study on Corrosion Fatigue Performance of AZ31 Magnesium Alloy with Laser Shock Processing[J]. Mechanical Science and Technology for Aerospace Engineering, 2015, 34(11): 1779-1783. doi: 10.13433/j.cnki.1003-8728.2015.1125
Citation: Li Xingcheng, Lu Yalin, Zhou Jinyu, Chen Jufang. Study on Corrosion Fatigue Performance of AZ31 Magnesium Alloy with Laser Shock Processing[J]. Mechanical Science and Technology for Aerospace Engineering, 2015, 34(11): 1779-1783. doi: 10.13433/j.cnki.1003-8728.2015.1125

激光冲击AZ31镁合金的腐蚀疲劳特性研究

doi: 10.13433/j.cnki.1003-8728.2015.1125
基金项目: 

国家自然科学基金项目(51275221)资助

详细信息
    作者简介:

    李兴成(1968-),副教授,博士,研究方向为金属材料表面强化处理技术,sgylxc@163.com

Study on Corrosion Fatigue Performance of AZ31 Magnesium Alloy with Laser Shock Processing

  • 摘要: 为探究激光冲击对AZ31镁合金腐蚀疲劳性能的影响,采用钕玻璃激光器激光冲击处理AZ31镁合金表面,采用透射电子显微镜观察激光冲击后镁合金表层的微观组织,分别在3.5%(wt)氯化钠溶液和空气中测试其三点弯曲腐蚀疲劳性能。微观组织表明激光冲击波导致镁合金表面层产生超高应变速率塑性变形,晶粒内部存在与孪晶相互交叉、相互缠结的高密度位错而导致晶粒细化;腐蚀疲劳曲线表明激光冲击试样疲劳寿命高于冲击前试样,在空气中疲劳寿命提高约38.25%,在溶液中疲劳寿命提高约183.47%,激光冲击AZ31镁合金所产生的微观组织和残余应力是降低其裂纹扩展速率的主要因素。
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出版历程
  • 收稿日期:  2015-01-26
  • 刊出日期:  2015-11-05

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