Observation of interface of two kinds of bi-metal composite parts prepared by thixo-forging
Two kinds of bi-metal composite parts (Sn-15％Pb and Pb-22％Sn bi-metal system,and Al-7％Si and SiCp/6061 MMC bi-metal system) were prepared by the strain-induced melt activated thixo-forging.The interfaces of the bi-metal composites were observed by OM and SEM.The observations show that the semisolid metals keep independence during thixo-forging.The solid phases in the semisolid slurries maintain their original morphologies after thixo-forging.The liquid phases near the interface mix together and form a thin layer.The interfaces are bonded firmly with the metallurgical bonding.No oxide layers are found at the interfaces.Strengths of the interfaces were investigated by the micro-hardness test.The experimental results show that the composite interfaces have high strength.However,the agglomerated enhancing particles cause fine defect on the interface of the Al-7％Si and SiCp/6061 MMC bi-metal composite.
semisolid metal processing bi-metal composite thixo-forming,die-forging metal matrix composite
YANG Zhao ZHOU Li DONG Jian-xiong
School of Materials Science and Engineering, Central South University, Changsha 410083, China School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;Ba
国际会议
北京
英文
1579-1584
2010-09-16（万方平台首次上网日期，不代表论文的发表时间）