陈思成,李长荣,杜振民,郭翠萍,李志风,张麦仓

• 1:北京科技大学材料科学与工程学院

摘要(Abstract)：

采用三维有限元方法计算了不同形状因子的γ'强化相在基体为γ相的Ni基高温合金中引起的弹性应变能密度,进而建立了以形状因子为变量的弹性应变能密度表达式。通过最小化γ'强化相引起的弹性应变能和界面能之和,得到了γ'强化相的平衡形状与其特征半径之间的函数关系。本文的分析很好地解释了文献报道的Ni基高温合金中γ'强化相形状演变的实验规律,结果表明:通过三维有限元法结合强化相粒子形状近似法计算模型,可以给出复杂情况下强化相粒子引起的弹性应变能密度的表达式,并有效地应用于材料共格相变的热力学研究。

关键词(KeyWords)： 时效硬化;共格平衡;弹性能;有限元方法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50731002,50671009)

作者(Author): 陈思成,李长荣,杜振民,郭翠萍,李志风,张麦仓

DOI: 10.13289/j.issn.1009-6264.2012.12.028

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