文献类型：期刊文章

作　　者：王军伟[1] 王智平[1,2] 路阳[1,2] 朱昌盛[1,3] 冯力[1] 肖荣振[1]

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,兰州730050 [2]甘肃省有色金属及复合材料工程研究中心,兰州730050 [3]兰州理工大学CAD中心,兰州730050

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project (10964004) supported by the National Natural Science Foundation of China;Project (20070731001) supported by Research Fund for the Doctoral Program of China;Project (096RJZA104) supported by the Natural Science Foundation of Gansu Province,China

年　　份：2012

卷　　号：22

期　　号：2

起止页码：391-397

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2011_2012、EI、INSPEC、JST、SCI(收录号：WOS:000301290500024)、SCI-EXPANDED(收录号：WOS:000301290500024)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：The influence of supercooled melt forced lamina flow on microsegregation was investigated. The concentration distribution at solid-liquid boundary of binary alloy Ni-Cu was simulated using phase field model coupled with flow field. The microsegregation, concentration maximum value, boundary thickness of concentration near upstream dendrite and normal to flow dendrite, and downstream dendrite were studied quantitatively in the case of forced lamia flow. The simulation results show that solute field and flow field interact complexly. Compared with melt without flow, in front of upstream dendrite tip, the concentration boundary thickness is the lowest and the concentration maximum value is the smallest for melt with flow. However, in front of downstream dendrite tip, the results are just the opposite. The zone of poor Cu in upstream dendrite where is the most severely microsegregation and shrinkage cavity is wider and the concentration is lower for melt with flow than that without flow.

关 键 词：computer simulation  phase field method  solidification  forced lamina flow  MICROSEGREGATION solute redistribution  shrinkage cavity  

分 类 号：TQ021.1]