首页|Microstructure and microtexture evolution characteristics of a powder metallurgy Ni-based superalloy during static recrystallization
Microstructure and microtexture evolution characteristics of a powder metallurgy Ni-based superalloy during static recrystallization
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
万方数据
维普
Static recrystallization(SRX)characteristics of a powder metallurgy superalloy were investigated by isothermal com-pression at 1080-1170℃ under strain rates of 0.01-0.1 s-1,strains of 0.1,0.22,or 0.5,and holding time of 0-300 s.The impacts of temperature,strain rate,holding time,and strain on the SRXed grain size,volume fraction,and microtexture were explored by electron backscatter diffraction technique.It was found that temperature played a key role in these processes.As SRX progressed,the＜110＞fiber parallel to the axis compression direction gradually weakened and was replaced by the＜001＞fiber because＜001＞was the preferred recrystallization orientation and grain growth direction for the Ni-based superalloy.Moreover,high temperatures and low strain rates promoted the formation of the＜001＞fiber.Three nucleation mechanisms during SRX process were found:grain boundary bulging,primary twin assistance,and subgrain coalescence.Grain boundary bulging occurred under all process conditions;however,at low temperatures and high strain rates,the latter two mechanisms could provide additional nucleation modes.In addition,SRX size and volume fraction models were established.
Powder metallurgy Ni-based superalloyStatic recrystallizationMicrotexture evolutionRecrystallization mechanismPrediction model
Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China
Beijing Research Institute of Mechanical and Electrical Technology Co.,Ltd.,CAM,Beijing 100083,China
China Academy of Machinery Science and Technology Group,Beijing 100044,China
Institute of Advanced Manufacturing and Intelligent Technology,Beijing University of Technology,Beijing 100124,China
展开 >
technology development fund of Beijing Research Institute of Mechanical&Electrical Technology Co.,LtdCAM,Construction of Innovation Leading Talents and Innovation Team of China Academy of Machinery Science and Technology Group
万方数据
维普
