基于氩离子截面抛光及电子背散射衍射技术的2A12铝合金显微组织检测方法探讨  

Discussion on determination method for microstructure of 2A12aluminum alloy based on cross section polisher and electron back scattering diffraction

作　　者：刘艳锋 潘永红 李晓增 赵宇清 王法云 LIU Yanfeng;PAN Yonghong;LI Xiaozeng;ZHAO Yuqing;WANG Fayun(Guangzhou Quality Supervision and Testing Institute,Collaborative Innovation Center for NQI-Quality Safety of Guangzhou,Guangzhou 511447,China)

机构地区：[1]广州质量监督检测研究院,广州市NQI-质量安全科技协同创新中心,广东广州511447

出　　处：《冶金分析》2024年第6期25-29,共5页Metallurgical Analysis

基　　金：广州质量监督检测研究院科技项目(GQT2023KJ13);广州市科技计划项目(2023B04J0407)。

摘　　要：常规对铝合金的显微组织检验方法主要采用金相法,但是该方法操作复杂,对轻微过烧组织容易造成误判,晶粒显示效果也不理想,具有一定的局限性。因此,为了更方便准确地进行铝合金显微组织分析,实验借助氩离子截面抛光(CP)和电子背散射衍射(EBSD)技术对2A12铝合金的显微组织分析方法进行了详细研究。结果表明,与常规金相法相比,经过氩离子截面抛光加工的铝合金试样无需腐蚀,在光学显微镜下即可灵敏准确地判断过烧组织,电子背散射衍射则可以对物相和晶粒度进行进一步的准确分析。The conventional method for microstructure inspection of aluminum alloy is mainly metallographic method.However,this method is complicated in operation,easy to misjudge the slightly overburnt structure,and the grain display effect is not ideal,which has certain limitations.In order to analyze the microstructure of aluminum alloy more conveniently and accurately,the determination method for microstructure of 2A12 aluminum alloy was systemically investigated based on cross section polisher(CP)and electron back scattering diffraction(EBSD).The results show that compared with the conventional metallographic method,the burnt microstructure of aluminum alloy processed by cross section polisher could be determined sensitively and accurately under the optical microscope without corrosion,and the phase and grain size could be further analyzed accurately by electron backscattering diffraction.

关 键 词：氩离子截面抛光(CP) 电子背散射衍射(EBSD) 铝合金 显微组织 

分 类 号：TF801.3[冶金工程—有色金属冶金] TG115[金属学及工艺—物理冶金] TN305.2[金属学及工艺—金属学]