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.
基金
山东省自然科学基金
