Hot deformation behaviour and processing maps of AA6061-10 vol. % SiC composite prepared by spark plasma sintering  

作　　者：LI XiaoPu LIU ChongYu SUN XiaoWei MA MingZhen LIU RiPing 

机构地区：[1]State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China [2]Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, Guilin University of Technology, Guilin 541004, China [3]Hebei Vocational and Technical College of Building Materials, Qinhuangdao 066004, China

出　　处：《Science China(Technological Sciences)》2016年第6期980-988,共9页中国科学（技术科学英文版）

基　　金：supported by the National Basic Research Program of China(“973”Project)(Grant No.2013CB733000)

摘　　要：AA6061-10 vol.% SiC composite was successfully prepared by spark plasma sintering. The deformation behaviour of this composite was studied using the uniaxial compression test, which was conducted at temperatures between 300 and 500℃ and strain rates between 0.001 and 1 s^-1. Results indicate that the stress-strain curves of the AA6061-10 vol.% SiC composite typically feature dynamic recrystallization. The steady stress can be described by a hyperbolic sine constitutive equation, and the activation energy of the composite is 230.88 kJ/mol. The processing map was established according to the dynamic materials model. The optimum hot deformation temperature is 450-500℃ and the strain rate is 1-0.1 s^-1. The instability zones of flow behaviour can also be identified using the processing map.

关 键 词：AI matrix composite hot deformation processing map stress-strain curves spark plasma sintering 

分 类 号：TB333[一般工业技术—材料科学与工程]