章建军,杨程,刘晓平,马幼平

• 1:西安建筑科技大学冶金工程学院

摘要(Abstract)：

HRTEM观察到45钢冲击磨损表面的非晶-纳米晶混合组织由几个纳米的晶粒和非晶组成,而沿着裂纹表面有非晶呈带状分布。热力学计算表明,在冲击载荷下可能存在一种新的非晶形成机理,非晶可由纳米晶粒转化而来,而裂纹表面是非晶形成的优先位置,与观察结果相符,且界面能在非晶转变中起到主要作用。计算结果还表明材料内部也可形成非晶,但阻力较大。而不经由纳米晶直接由高密度位错区形成非晶则非常困难。

关键词(KeyWords)： 非晶;纳米晶;界面能;高密度位错

Abstract:

Keywords:

基金项目(Foundation): 西安建筑科技大学校人才基金项目(RC0819)

作者(Author): 章建军,杨程,刘晓平,马幼平

DOI: 10.13289/j.issn.1009-6264.2011.07.026

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