Static and Metadynamic Recrystallization of Low Carbon Steels During Mechanical Deformation  

作　　者：沈丙振 方能炜 沈厚发 柳百成 

机构地区：[1]Department of Mechanical Engineering Tsinghua University, Beijing 100084, China

出　　处：《Tsinghua Science and Technology》2004年第6期622-627,共6页清华大学学报（自然科学版（英文版）

基　　金：SupportedbytheFundamentalResearchProgramoftheMinistryofScienceandTechnologyofChina(No.G2000067208-3)

摘　　要：Static and metadynamic recrystallization models were developed with the coefficients determined by multiple nonlinear regression analyses to describe microstructure evolution in low carbon steels. The effects of initial grain size, deformation temperature, strain, and strain rate on the austenitic recrystal-lized volume fraction and grain size were studied using a Gleeble machine. The results show that deformation reduces the grain size when the recrystallized volume fraction is large. The static recrystallized volume fraction increases with increasing deformation temperature, strain, and strain rate, and decreasing initial grain size. The grain size during metadynamic recrystallization is independent of the deformation strain and the initial grain size. The recrystallized volume fraction, the grain size, and the grown grain size calculated by the correlations are consistent with the measured values.Static and metadynamic recrystallization models were developed with the coefficients determined by multiple nonlinear regression analyses to describe microstructure evolution in low carbon steels. The effects of initial grain size, deformation temperature, strain, and strain rate on the austenitic recrystal-lized volume fraction and grain size were studied using a Gleeble machine. The results show that deformation reduces the grain size when the recrystallized volume fraction is large. The static recrystallized volume fraction increases with increasing deformation temperature, strain, and strain rate, and decreasing initial grain size. The grain size during metadynamic recrystallization is independent of the deformation strain and the initial grain size. The recrystallized volume fraction, the grain size, and the grown grain size calculated by the correlations are consistent with the measured values.

关 键 词：MICROSTRUCTURE static recrystallization metadynamic recrystallization low carbon steel 

分 类 号：TG115[金属学及工艺—物理冶金]