Effect of Sr on Grain Refinement of Mg–3%Al Alloy Containing Trace Fe by Carbon-Inoculation

作     者：Jun Du Yutong Shi Mingchuan Zhou Wenfang Li 

作者机构：School of Materials Science and EngineeringSouth China University of Technology 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2016年第32卷第12期

页      面：1297-1302页

核心收录：

学科分类：080503[工学-材料加工工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：supported by the National Natural Science Foundation of China(No.51574127) the Natural Science Foundation of Guangdong Province(No.2014A030313221) 

主　　题：Magnesium alloy Grain refinement Carbon inoculation Nucleating substrate Poisoning free 

摘      要：Magnesium（Mg）-3% aluminum（Al）（in weight） alloy was modified by carbon（C） inoculation combining with strontium（Sr）.The effects of trace 0.1% iron（Fe） addition and operating sequence of carboninoculation and Fe addition on the grain size of Mg-3%Al alloy were *** results reveal that the Sr addition could effectively suppress grain-coarsening resulted from the inclusion of Fe in the carboninoculated Mg-Al *** addition could contribute to the formation of the duplex-phase particles that Al-C-rich phases coated on Al-Fe or Al-C-Fe-rich phases,regardless of the Fe addition *** duplex-phase particles should be the potent substrates for α-Mg ***,Sr addition could effectively subsidize the inhibiting effect of Fe on grain refinement and the active nuclei were *** other words,Sr plays a counter role in the poisoning effect of Fe on the microstructure of Mg-3%Al alloy.