Solidification process of conventional superalloy by confocal scanning laser microscope  

利用共聚焦扫描激光显微镜观察一种常见高温合金的凝固过程(英文)

作　　者：缪竹骏[1] 单爱党[1] 王威 卢俊[3] 徐文亮[3] 宋洪伟[3] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]华东理工大学机械与动力工程学院,上海200237 [3]宝山钢铁股份有限公司宝钢研究院,上海201900

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第2期236-242,共7页中国有色金属学报（英文版）

基　　金：Project(08dj1400402) supported by the Major Program for the Fundamental Research of Shanghai Committee of Science and Technology, China

摘　　要：The solidification process of a conventional superalloy, IN718, was investigated by confocal scanning laser microscope （CSLM）. The liquid fraction during solidification was obtained as a function of real time and temperature in reference with the in-situ observation. The characteristics of L→γ transformation were analyzed and the γ growing rate of each stage was also calculated. Scheil equation was employed to predict the segregation behavior, and the predict results are in consistence with the experimental results. As a result, the confocal scanning laser microscope shows a great potential for solidification process research.利用共聚焦扫描激光显微镜直接观察一种常见高温合金(IN718)的凝固过程。根据动态原位观察结果,凝固过程中的液相体积分数可以表示为时间或温度的函数,分析L→γ的凝固过程得到不同阶段的γ生长速率。利用Scheil方程对凝固过程中元素的偏析行为进行模拟,计算结果与原位观察结果相吻合。共聚焦扫描激光显微镜作为研究合金凝固行为的工具极具潜力。

关 键 词：IN718 alloy SOLIDIFICATION IN-SITU confocal scanning laser microscope SEGREGATION 

分 类 号：TG111.4[金属学及工艺—物理冶金]