低铝含量Ni75AlxV25-x合金早期沉淀过程的原子尺度计算机模拟

被引:0
|
作者
赵宇宏
陈铮
王永欣
唐丽英
机构
[1] 西北工业大学材料科学与工程学院
关键词
早期沉淀; 原子尺度; 计算机模拟;
D O I
10.19476/j.ysxb.1004.0609.2004.04.003
中图分类号
TG111 [金属物理学];
学科分类号
0702 ; 070205 ;
摘要
采用微观相场模型,基于离散格点形式的微观扩散方程和非平衡自由能函数,编制了三元Ni75AlxV25-x合金的原子层面计算机模拟程序。模拟发现:低铝含量Ni75AlxV25-x合金的θ相先于γ′相析出,其沉淀机制为等成分有序化+失稳分解;γ′相在θ相的相界处非经典形核,二者均先形成非化学计量比有序相,之后向化学计量比有序相转变。
引用
收藏
页码:534 / 538
页数:5
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