Effect of ball milling on microstructural evolution during partial remelting of6061 aluminum alloy prepared by cold-pressing of alloy powders

作     者：陈玉狮 陈体军 张素卿 李普博 Yu-shi CHEN;Ti-jun CHEN;Su-qing ZHANG;Pu-bo LI

作者机构：兰州理工大学有色金属先进加工与再利用省部共建国家重点实验室兰州730050 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2015年第25卷第7期

页      面：2113-2121页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project(G2010CB635106)supported by the National Basic Research Program of China Project(NCET-10-0023)supported by the Program for New Century Excellent Talents in University of China Project supported by the Program for Hongliu Outstanding Talents of Lanzhou University of Technology,China Project(2014-07)supported by the Basic Scientific Research Expenses of Gansu University,China 

主　　题：6061 aluminum alloy ball milling powder thixoforming partial remelting microstructural evolution 

摘      要：The effect of ball milling on the microstructural evolution was investigated during partial remelting of 6061 aluminum alloy prepared by cold-pressing of atomized alloy *** results indicate that the microstructural evolution of 6061 aluminum alloy can be divided into three stages,the dissolution of eutectic phases and the coarsening and growth behavior of the resulting grains,structural separation and spheroidization of primary particles,and the final coarsening behavior of the *** with the alloy without ball milling,ball milling accelerates the first stage of microstructural evolution due to the energy stored in the powders,but the latter two stages are slowed down because of the formation of large-sized ***,the finer the as-cold-pressed microstructure is,the smaller and more spherical the primary particles in the final semisolid microstructure ***,properly elevating the heating temperature is beneficial for obtaining small and spheroidal particles.