晶粒取向和物相组成的电子背散射衍射测定  

ELECTRON BACKSCATTER DIFFRACTION DETERMINATION OF GRAIN ORIENTATION AND CONSTITUENT PHASES

作　　者：陈小梅[1] 刘静[1] 王建波[1] 张瑞康[1] 汪大海[1] 王仁卉[1] 桂嘉年[1] 陈方玉[2] 

机构地区：[1]武汉大学物理学系 [2]武汉钢铁集团公司技术中心

出　　处：《武汉大学学报（自然科学版）》1999年第1期65-68,共4页Journal of Wuhan University(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：介绍了用扫描电镜中电子背散射衍射（ＥＢＳＤ）附件所进行的初步研究工作．这些工作表明，２Ｈ马氏体的基面由母相的一个｛２２０｝Ｐ面转变而来，一个自协作马氏体片群内的Ａ、Ｂ、Ｃ、Ｄ４个变体由母相的不同的｛１１０｝Ｐ面转变而来．用ＥＢＳＤ技术可测出它们之间的取向关系．ＥＢＳＤ技术所提供的结构信息与Ｘ射线能谱分析提供的化学成分信息相结合使微区物相鉴定的结果更为可靠．发现Ａｌ６２．５Ｃｕ２５Ｆｅ１２．５合金的铸态主要由λ－Ａｌ１３Ｆｅ４、二十面体准晶和β相３者组成．无间隙钢７５０℃再结晶后有两类晶粒，其中平坦晶粒具有有利于冷加工性的γ纤维显微织构．This paper describes our preliminary results by using electron backscatter diffraction(EBSD) attachment in a scanning electron microscope. These studies revealed that the basal plane of 2H martensite originates from one {220} P plane of the parent phase, four variants A,B,C,D of a self accommodating plate group originate from various {220} P planes of the parent phase. Their orientation relationships can be determined by EBSD technique. The structural information provided by EBSD technique together with the composition information provided by energy dispersive X ray spectrometer leads to much convincible identification of micro area phases. By this method three phases were identified in as cast Al Cu Fe alloys with composition near that of icosahedral quasicrystal(IQC), namely IQC, λ Al 13 Fe 4 and β phases. Two types of grains were found in an interstitial free steel recrystallized at 750℃.Among them the flat grains possess γ fibre microtexture benifitial to the cold workability.

关 键 词：电子背散射衍射 形状记忆合金 晶粒取向 相 测定 

分 类 号：TG113.12[金属学及工艺—物理冶金] TG130.6[金属学及工艺—金属学]