Manufacturing of aluminum alloy ultra-thick plates by multidirectional forging and subsequent rolling

来源期刊：中国有色金属学报(英文版)2002年第2期

论文作者：张辉 林高用 彭大暑 杨立斌 林启权

文章页码：218 - 221

Key words：7075 aluminum alloy; combination deformation model; forging; rolling

Abstract: 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 (2～3μm) structures were obtained when total deformation coefficient λ=32 at 250～350℃ under a strain rate of about 0.1s^-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.