Effects of processing parameters on microstructure and mechanical properties of powder-thixoforged 6061 aluminum alloy

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3期

页      面：699-712页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：Project(2014-07)supported by the Basic Scientific Fund of Gansu University,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 

主　　题：6061 aluminum alloy semisolid powder thixoforging mechanical properties tensile properties hardness microstructure 

摘      要：A new processing technology,powder thixoforming,for preparation of particle reinforced metal matrix composites was proposed and 6061 aluminum alloy was prepared by powder thixoforging.6061 ingots were first prepared by cold-pressing the atomized 6061 alloy powders,and then the ingots were partially remelted followed by *** effects of reheating time,mould temperature and reheating temperature on microstructure and mechanical properties of the thixoforged alloys were *** results indicate that all of the three parameters have large effects on the microstructure and mechanical *** to the microstructure changes,the fracture regime varies with the processing ***,cracks always initiate from shrinkage porosities and inclusions,and then propagate either along the secondarily solidified structures or primary *** ultimate tensile strength,elongation and hardness of the resulting alloy are up to 196 MPa,11.0%and HV 55.7 respectively.