Rheological behavior,microstructure and hardness of A356 aluminum alloy in semisolid state using backward extrusion process

作     者：S.A.SADOUGH M.R.RAHMANI V.POUYAFAR 

作者机构：Center of Excellence in TermoelasticityAmir Kabir University of Technology Department of Mechanical EngineeringIslamic Azad University Science and Research Branch 

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

年 卷 期：2010年第20卷第S3期

页      面：906-910页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0813[工学-建筑学] 0802[工学-机械工程] 0814[工学-土木工程] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

主　　题：aluminum alloy A356 backward extrusion semisolid forming rheology 

摘      要：The influence of temperature on the flow behavior and rheological characteristics of an A356 alloy in the semi-solid state was investigated using backward extrusion *** were performed at 5 temperatures and 4 different wall *** were determined using the force-displacement graphs obtained form back extrusion *** observed experimentally,at a constant temperature,the increase of shear rate results in the decrease of alloy viscosity *** the temperature increases the liquid fraction hence reduces the semi-solid alloy *** and image analyses show that,because of low forming speed,liquid has time to escape from solid phase forward the sample *** condition is the main reason for the segregation phenomenon seen in the base and *** hardness test on samples reveals that the hardness increases with the decrease of temperature and wall thickness.