DETERMINATION OF DYNAMIC RECRYSTALLIZATION PROCESS BY EQUIVALENT STRAIN

摘要：

　　Based on TapHOBCKH(H)”s displacement field,equivalent strain expression was derived.And according to the dynamic recrystallization(DRX)critical strain,DRX process was determined by equivalent strain.It was found that equivalent strain distribution in deformed specimen is inhomogeneous,and it increases with increasing true strain.Under a certain true strain,equivalent strains at the center,demisemi radius or on tangential plane just below the surface of the specimen are higher than the true strain.Thus,micrographs at those positions can not exactly reflect the true microstructures under the certain true strain.With increasing strain rate,the initial and finish time of DRX decrease.The frozen microstructures of 20Mn23AlV steel with the experimental condition validate the feasibility of predicting DRX process by equivalent strain.

关键词： Equivalent strain Dynamic recrystallization Critical strain

作者: Xiaomei Qin Wei Deng

作者单位: Nanjing Iron& Steel Co.,LTD,Liuhe District,Nanjing,Jiangsu,210035,China

会议类型: 国内会议

会议名称: 第七届低合金高强度钢国际会议

会议地点: 杭州

会议语种:英文

页码: 179-185

在线出版日期: 2015-11-11（万方平台首次上网日期，不代表论文的发表时间）