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DD6镍基单晶合金气膜孔薄壁平板高温蠕变性能

艾兴 高行山 温志勋 刘大顺 岳珠峰

艾兴, 高行山, 温志勋, 刘大顺, 岳珠峰. DD6镍基单晶合金气膜孔薄壁平板高温蠕变性能[J]. 航空动力学报, 2014, (5): 1197-1204.
引用本文: 艾兴, 高行山, 温志勋, 刘大顺, 岳珠峰. DD6镍基单晶合金气膜孔薄壁平板高温蠕变性能[J]. 航空动力学报, 2014, (5): 1197-1204.
AI Xing, GAO Hang-shan, WEN Zhi-xun, LIU Da-shun, YUE Zhu-feng. Creep behavior of thin-walled plate with cooling holes of nickel-based single crystal superalloy DD6 under high temperature[J]. Journal of Aerospace Power, 2014, (5): 1197-1204.
Citation: AI Xing, GAO Hang-shan, WEN Zhi-xun, LIU Da-shun, YUE Zhu-feng. Creep behavior of thin-walled plate with cooling holes of nickel-based single crystal superalloy DD6 under high temperature[J]. Journal of Aerospace Power, 2014, (5): 1197-1204.

DD6镍基单晶合金气膜孔薄壁平板高温蠕变性能

基金项目: 

国家自然科学基金(51175424,51210008);西北工业大学基础研究基金(JC201238,JC201239);西北工业大学研究生创业种子基金资助(Z2014012)

详细信息
    作者简介:

    艾兴(1989- ),男,湖南株洲人,硕士生,主要从事先进材料力学性能测试与模拟研究.

  • 中图分类号: V21;O733

Creep behavior of thin-walled plate with cooling holes of nickel-based single crystal superalloy DD6 under high temperature

  • 摘要: 采用气膜孔薄壁平板试样模拟冷却叶片,并与无气膜孔薄壁平板试样蠕变试验结果进行对比,研究了气膜孔对镍基单晶合金冷却叶片模拟试样高温持久断裂寿命的影响.试验结果表明:在950℃和377MPa条件下,无气膜孔薄壁平板试样的高温持久断裂寿命大约是气膜孔薄壁平板试样的2倍,扫描电镜(SEM)断口分析可以看出蠕变损伤首先发源于气膜孔周围并在气膜孔边缘开始起裂.基于晶体塑性理论建立单晶材料蠕变数值计算模型,将其编入Abaqus用户子程序中,对气膜孔和无气膜孔两种薄壁平板试样进行模拟分析.模拟结果显示在气膜孔周边存在应力集中和应力重分布,数值模拟分析结果与试样的断口表面形貌吻合.为便于工程应用,将高温持久断裂寿命与十二面体滑移系最大分切应力幅表达成指数关系,蠕变试验结果表明此式在该应力、温度条件下具有良好的精度.

     

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出版历程
  • 收稿日期:  2013-07-01
  • 刊出日期:  2014-05-28

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