Rheologic behaviors of A356 aluminum alloy billet produced by semisolid continuous casting process

作     者：Shuming Xing Lizhong ZHANG Yunhui DU Daben ZENG Jinlin TANG 

作者机构：Department of Mechanical Engineering Beijing Jiaotong University Beijing 100044 P.R. China Department of Meclanical Engineering Tsinghua University Beijing 100084 P.R.China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2004年第1卷第1期

页      面：62-66页

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] 

主　　题：semisolid continuous casting billet aluminum alloy rheologic behavior 

摘      要：The experiments for rheologic behaviors of semisolid continuous casting billets of A356 alloy in semisolid state had been carried out with a multifunctional rheometer. The results show that the deformation rate increases with loading time, the maximum strain reaches to 120％ (which is one time larger than that of traditional mold casting billet) and the strain can be rapidly eliminated to 10％ after unloading. Moreover, there is a critic stress for billet deformation even in semisolid state, which is named as critic shear stress. This stress increases with the decreasing of heating time. The theologic behaviors can be expressed by five elements mechanical model (H_2- [N_1|H_2]-[N_2|S]) and can be modified with the increasing of heating time.