MORPHOLOGY EVOLUTION OF PRIMARY PARTICLES IN LSPSF RHEOCASTING PROCESS

摘要：

Experimental and microstructure simulation approaches were taken to investigate the morphological evolutions of primary particles in an Al-20wt％ pct Cu alloy under LSPSF (low superheat pouring with a shear field) rheocasting conditions. The results indicate that crystals are globular and present in non-entrapped eutectic, after 3s of solidification. The morphology of these crystals during the subsequent free growth is determined by both the number of free crystals and the cooling intensity of melt. Analyzed results from microstructure simulation and two stability models suggest that the primary globular particles formed in the earlier stage of solidification can attain growth stability up to a larger size scale.

关键词： Rheocasting interface stability solidification microstructure simulation

作者: Hong-Min Guo Xiang-Jie Yang

作者单位: School of Materials Science and Engineering, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi 330031, Peoples Republic of China

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 881-887

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）