张晓霞,秦颖,郝胜智,张向东,董闯

• 1:大连理工大学三束材料改性教育部重点实验室

摘要(Abstract)：

在强流脉冲电子束表面改性实验的基础上,通过数值计算方法对β-Cez钛合金的温度场和应力场进行模拟。模拟结果表明:以能量密度为3 J/cm2的单次脉冲处理,样品的最大熔化深度为1.0μm;试样表层(0~2.4μm)为压应力,最大值约2.60 GPa,次表层(2.4~12μm)有大于100 MPa的拉应力,在深度3.2μm处存在最大值,约为500 MPa。实验截面EBSD结果显示,强流脉冲电子束处理β-Cez钛合金有约12μm深的马氏体层。由马氏体相变诱发应力与温度的关系得到马氏体相变最大的触发应力值为2.40 GPa,与准静态最大压应力值2.60 GPa相当,说明马氏体相变源于准静态热应力引发的冲击热应力。由马氏体相变触发应力和深度的分布关系给出应力在β-Cez钛合金中的衰减系数为173 mm-1。

关键词(KeyWords)： 强流脉冲电子束(HCPEB);β-Cez钛合金;温度场;应力场;马氏体相变

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项资金(DUT13LAB09)

作者(Author): 张晓霞,秦颖,郝胜智,张向东,董闯

DOI: 10.13289/j.issn.1009-6264.2014.01.039

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