摘要
A combinatory large deformation model of multidirectional forging and subsequent rolling was proposed for producing high performance aluminum alloy ultra thick plates. The results show that fine grain (2～ 3?μm ) structures were obtained when total deformation coefficient λ = 32 at 250 ～ 350?℃ under a strain rate of about 0.1?s -1 . The development of fine grained structure can be characterized by the formation of strain induced high energy dislocation and then transforms into new grain under large deformation at moderate temperature. The very fine secondary particles formed during large deformation play important role in retain the stability of the fine grained structures.
A combinatory large deformation model of multidirectional forging and subsequent rolling was proposed for producing high performance aluminum alloy ultra thick plates. The results show that fine grain (2～ 3?μm ) structures were obtained when total deformation coefficient λ = 32 at 250 ～ 350?℃ under a strain rate of about 0.1?s -1 . The development of fine grained structure can be characterized by the formation of strain induced high energy dislocation and then transforms into new grain under large deformation at moderate temperature. The very fine secondary particles formed during large deformation play important role in retain the stability of the fine grained structures.
出处
《中国有色金属学会会刊：英文版》
CSCD
2002年第2期218-221,共4页
Transactions of Nonferrous Metals Society of China
基金
Project (G19990 64 90 8)supportedbytheNationalKeyFundamentalResearchandDevelopmentProgram
