高温合金中晶粒异常长大及临界变形量研究进展  

Progress in research of abnormal grain growth and critical deformation in superalloys

作　　者：郭婧[1] 姚志浩[1] 董建新[1] 张麦仓[1] 

机构地区：[1]北京科技大学,北京100083

出　　处：《世界钢铁》2011年第4期38-45,67,共9页World Iron & Steel

基　　金：国家自然科学基金(51071017)

摘　　要：针对目前急需解决的高温合金晶粒度控制问题,研究了临界变形量与晶粒度遗传性的理论基础。为建立晶粒度预测模型,基于晶粒异常长大的影响因素,重点探讨了合金经历小变形后的临界变形粗晶理论及异常长大模型研究进展。最后介绍了研究晶粒异常长大的数值模拟方法,并深入探讨这些研究方法的理论原理及可行性。Aiming at the current topic of controlling grain size in superalloys,the theoretical basis of critical deformation and heredity of grain size are studied.In order to establish a prediction model for grain size,considering the factors influencing the abnormal grain growth,this paper probes into the theory of critical deformed coarse grain after the superalloys experience the minor deformation,and the model of abnormal grain growth.At the end of article,the numerical simulation method studing the abnormal grain growth is introduced and the theoretical principle and feasibility of these research methods is also thoroughly discussed.

关 键 词：晶粒异常长大 第二相粒子 临界变形粗晶 初始晶粒度分布 

分 类 号：O211.67[理学—概率论与数理统计]