%0 Journal Article %T EFFECTS OF DEFORMATION ON MICROSTRUCTURE AND σ-PHASE FORMATION IN Cr_(25)Ni_(20) STAINLESS STEEL %A GAO Yan LI Dejun CAO Zhiben Dalian University of Science and Technology %A Dalian %A Liaoning %A China LI Dejun %A Lecturer %J 金属学报(英文版) %D 1989 %I %X The microstructure of Cr_(25)Ni_(20)stainless steel under plastic deformation up to 50% has re-vealed an even distributed twins,micro-twins and deformation bands.The σ-phase formationin 800℃ aged specimens is accelerated by its nucleation at either deformation twins orrecrystallized grain boundaries under less or more deformation respectively.In therecrystallized zone,the recrystallization is prior to the precipitation of σ-phase.Althoughrecrystallization may accelerate the formation of σ-phase,it is not essential.The twins andmicro-twins produced by deformation may also provide the additional nucleation sites. %K plastic %K deformation %K α-phase %K recrystallization %U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=7C3C2EF10622EB38B7087D1A68ABCA09&yid=1833A6AA51F779C1&vid=0B39A22176CE99FB&iid=0B39A22176CE99FB&sid=0B4F496D54044D86&eid=BA79719BCA7341D5&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=0