材料期刊网

奥氏体形变对先共析铁素体等温形成孕育期的影响

李箭 , 孙福玉

金属学报

将Feder相变孕育期表达式引入形变奥氏体的分解中,建立了奥氏体形变条件下先共析铁素体等温形成孕育期的计算方法,计算了奥氏体形变储能和奥氏体晶界能量变化对相变孕育期的影响,计算结果与实验所得规律一致。

关键词: 形变奥氏体 , ferrite , incubation time

Modeling of Incubation Time for Austenite to Ferrite Phase Transformation

钢铁研究学报(英文版)

关键词:

原子间相互作用能对Ni_(75)Al_xV_(25-x)合金孕育期影响的微观相场模拟

徐聪 , 陈铮 , 王永欣 , 钟汉文 , 孙立岩 , 苗海川

稀有金属材料与工程

基于微观相场动力学模型,研究原子间相互作用能对Ni_(75)Al_xV_(25-x)合金孕育期的影响.根据Khachaturyan所给的占位几率公式进一步得到了长程序参数的求值公式.结果表明,先析出相为DO_(22)时,Ni-Al最近邻原子间作用能V_(Ni-Al)增大,L1_2相的孕育期缩短,DO_(22)相的孕育期变化不明显;Ni-V最近邻原子间作用能V_(Ni-v)增大,L1_2相和DO_(22)相的孕育期均缩短.先析出相为L1_2相时,V_(Ni-Al)增大,L1_2相和DO_(22)相孕育期均缩短;V_(Ni-v)增大,L1_2相孕育期变化不明显,DO_(22)相的孕育期缩短.

关键词: 孕育期 , 原子间相互作用能 , 微观相场 , Ni_(75)Al_xV_(25-x)合金

EFFECT OF AUSTENITE DEFORMATION ON ISOTHERMAL INCUBATION TIME OF PROEUTECTOID FERRITE NUCLEATION

LI Jian SUN Fuyu Central Iron and Steel Research Institute , Ministry of Metallurgical Industry , Beijing , China

金属学报(英文版)

A calculation method for the isothermal nucleation incubation time of pro-eutectoid ferrite formed from deformed austenite has been developed by introducing Feder's incubation time expression into the decomposition of deformed austenite.The effects of austenite deformation stored energy and austenite grain boundary energy change on the incubation time have been theoretically calculated and the rule of calculated results is consistent with that of experiments,this confirms that austenite deformation stored energy and the change of austenite grain boundary energy are the natural effect of austenite deformation on ferrite nucleation.

关键词: deformed austenite , null , null