钟汉文,卢艳丽,陈铮,徐聪,马锐,孙立岩

• 1:西北工业大学材料学院
• 2:西北工业大学凝固技术国家重点实验室

摘要(Abstract)：

基于含应变能的微观相场动力学模型,利用结构函数归一化因子和标度函数,对Ni75Cr19Al6合金沉淀后期DO22相的粗化行为进行研究。结果表明:DO22相的结构函数归一化因子和标度函数在沉淀后期阶段均表现出标度行为,加入应变能后,DO22有序畴尺寸在非弹性"软"方向上的长大受到阻碍,DO22有序畴的体积分数也减小,结构函数的归一化结构因子和标度函数曲线峰值均小于未加应变能的值。

关键词(KeyWords)： 应变能;结构函数;标度行为;微观相场

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50671084,50875217);; 中国博士后科学基金(20070420218);; 陕西省自然科学基金

作者(Author): 钟汉文,卢艳丽,陈铮,徐聪,马锐,孙立岩

参考文献(References)：

• [1]Fratzl,Lebowitz,Penrose.Scaling functions,self-similarity,and the morphology of phase-separating systems[J].Phys Rev B,1991,44(10):4794-4811.
• [2]Amitabha Chakrabati,Raul Toral,James D Gunton.Late-stage coarsening for off critical quenches:Scaling function and the growth law[J].Phys Rev E,1993,47(5):3025-3038.
• [3]Poduri R,Chen L Q.Computer simulation of morphological evolution and coarsening kinetics ofδ′(Al3Li)precipitates in Al-Li alloy[J].Acta Mater,1998,46(11):3915-3928.
• [4]LU Yan-li,CHEN Zheng,LI Yong-sheng.Microscopic phase-field simulation including elastic strain energy for early precipitation process of Ni-Al alloys withmedium Al content[J].Progress in Natural Science,2005,15(12):1104-1108.
• [5]LU Yan-li,CHEN Zheng,LI Yong-sheng.Microscopic phase-field simulation for the precipitation process of DO22and L12phases in Ni-Cr-Al alloys[J].Rare Metal Materials and Engineering,2007,36(12):2099-2103.
• [6]Prikhodko S V,Carnes J D,Isaak D G.Elastic constants of a Ni-12.69 at%Al alloy from 295 to 1300K[J].Scrita Materialia,1998,38(1),67-72.
• [7]Norio A,Voorhees P.Later-stage phase separation:dynamic,spatial correlations,and structure functions[J].Phys Rev E,1994,49(5):3860-3880.

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