热处理对AZ80镁合金疲劳性能的影响

李轶 李慧中 姜俊 欧阳杰

李轶, 李慧中, 姜俊, 欧阳杰. 热处理对AZ80镁合金疲劳性能的影响[J]. 航空材料学报, 2014, 34(6): 33-39. doi: 10.11868/j.issn.1005-5053.2014.6.004
引用本文: 李轶, 李慧中, 姜俊, 欧阳杰. 热处理对AZ80镁合金疲劳性能的影响[J]. 航空材料学报, 2014, 34(6): 33-39. doi: 10.11868/j.issn.1005-5053.2014.6.004
LI Yi, LI Hui-zhong, JIANG Jun, YANG Jie. Effect of Heat Treatment on Fatigue Properties of AZ80 Magnesium Alloy[J]. Journal of Aeronautical Materials, 2014, 34(6): 33-39. doi: 10.11868/j.issn.1005-5053.2014.6.004
Citation: LI Yi, LI Hui-zhong, JIANG Jun, YANG Jie. Effect of Heat Treatment on Fatigue Properties of AZ80 Magnesium Alloy[J]. Journal of Aeronautical Materials, 2014, 34(6): 33-39. doi: 10.11868/j.issn.1005-5053.2014.6.004

热处理对AZ80镁合金疲劳性能的影响

doi: 10.11868/j.issn.1005-5053.2014.6.004
详细信息
    通讯作者:

    李慧中(1966—), 男, 博士, 教授, 主要从事铝镁等合金的研究, (E-mail)lhz606@mail.csu.edu.cn

  • 中图分类号: V252.2;TG146.2+2

Effect of Heat Treatment on Fatigue Properties of AZ80 Magnesium Alloy

  • 摘要: 通过对AZ80镁合金进行总应变幅控制下的室温低周疲劳实验,研究其在热锻、时效态(T5)、固溶时效态(T6)三种不同热处理状态下的循环应力响应、疲劳寿命和循环应力-应变行为.结果表明:在三种不同的热处理制度下,AZ80镁合金大体上都表现为循环应变硬化现象;此外,AZ80镁合金的应变疲劳寿命与塑性应变幅、弹性应变幅之间的关系分别服从Coffin-Manson和Basquin关系式.随着外加总应变幅的不断增大,其疲劳寿命减少.在0.3%的最小外加总应变幅下,AZ80热锻态的疲劳寿命最长;在0.9%的最大外加总应变幅下,AZ80-T5的疲劳寿命最长,而热锻态最短.此外,对疲劳断口形貌的观察结果表明,疲劳裂纹萌生于疲劳试样表面,并以穿晶方式扩展.

     

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出版历程
  • 收稿日期:  2014-01-14
  • 修回日期:  2014-04-10
  • 刊出日期:  2014-12-01

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