贝氏体巨型台阶和界面结构  

Superledges and Interfacial Structures in Bainite

作　　者：李凤照[1,2] 顾英妮[1,2] 敖青[1,2] 姜江[1,2] 李斗星 

机构地区：[1]山东工业大学材料科学与工程学院 [2]中国科学院金属研究所固体原子像开放研究实验室

出　　处：《金属热处理学报》1998年第3期13-16,41,共5页

基　　金：山东省自然科学基金

摘　　要：使用ＴＥＭ和ＨＲＥＭ分别对贝氏体铁素体和Ｃｕ－Ｚｎ－Ａｌ合金贝氏体台阶形貌和界面结构进行了观察。钢中贝氏体铁素体和Ｃｕ－Ｚｎ－Ａｌ合金贝氏体宽面上存有单台阶、多台阶、系列台阶和三维台阶。贝氏体铁素体台阶高度为６～１６０ｎｍ，相当于｛１１１｝晶面１０００个原子层厚度。Ｃｕ－Ｚｎ－Ａｌ合金台阶高度为几个至几十个纳米。贝氏体铁素体有与马氏体不同的丰富的精细结构。贝氏体铁素体和Ｃｕ－Ｚｎ－Ａｌ合金中有丰富的台阶和巨型台阶。文中讨论了贝氏体的相变机制。The morphologies of ledges and interfacial strictures in bainitic ferrite and in bainite of Cu-Zn-Al alloys with TEM and HREM have been observed.There are mono ledges,multi ledges,series ledges and three dimension ledges on the wide planes of bainitic ferrite and Cu-Zn-Al alloys.The heights of the ledges in bainitic ferrite are within 6～160 nm which correspond to 1000 atomic layers of {111} crystal planes while the heights of ledges are several and several tens nm in Cu-Zn-Al alloys. There are different plenty fine structures in bainitic ferrite of steels.There are plenty ledges and superledges in bainitic ferrite and Cu-Zn-Al alloys.The bainitic phase transformation mechanism is discussed.

关 键 词：巨型台阶 台阶高度 贝氏体相变 界面结构 

分 类 号：TG151.2[金属学及工艺—热处理]