亚共晶Al-Si合金共晶硅变质的研究方法进展  

Progress in Research Methods of Eutectic Silicon Modification of Hypoeutectic Al-Si Alloy

作　　者：孙刚 吴桢 陆政 高文理[3] 毛郭灵 SUN Gang;WU Zhenu;LU Zheng;GAO Wenli;MAO Guoling(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Beijing Engineering Research Center of Advanced Aluminum Alloys and Applications,Beijing 100095,China;College of Materials Science and Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]北京市先进铝合金材料及应用工程技术研究中心,北京100095 [3]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《热加工工艺》2021年第11期1-4,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51474101,51271076,51474195)。

摘　　要：通过梳理相关变质共晶硅的文献,对研究共晶硅变质机理的方法进行了总结。通过分析凝固曲线得到共晶硅的形核温度、长大温度、形核长大时间等。通过分析共晶硅形核长大时间,可以佐证变质剂元素对共晶硅形核核心的影响。利用EBSD分析共晶硅的形核核心,共晶硅所在区域的色块多,表示共晶硅的形核核心多,Al-Si合金的EBSD样品制取需要用离子减薄法。利用TEM与XRD相结合的方法评价共晶硅孪晶的数量,得到的数据更具有可信度,制取TEM样品需要用离子铣削法。The methods for studying the metamorphic mechanism of eutectic silicon were summarized by combing the literatures of related metamorphic eutectic silicon. The nucleation temperature, growing temperature and growing time of eutectic silicon were obtained by analyzing the solidification curve. By analyzing the growth time of eutectic silicon nucleus,the influence of modifier elements on eutectic silicon core can be proved. Using EBSD to analyze the nucleation core of eutectic silicon, there are many color blocks in the region of eutectic silicon, indicating that the nucleation core of eutectic silicon is many, and the EBSD samples of Al-Si alloy need to be thinned by ion. Using the method combining TEM and XRD to evaluate the number of eutectic silicon twins, the obtained data are more reliable. The ion milling method is needed to prepare TEM samples.

关 键 词：共晶硅变质 凝固曲线 电子背散射衍射技术 透射电子显微镜 X射线衍射 

分 类 号：TG243[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]