Effect of solidification front velocity on the characteristics of aluminium-rich Al-Mn alloy solutions extended by rapid solidification

被引：26

作者：

Juarez Islas, J.A. ^{[1
]}

Jones, H. ^{[1
]}

Kurz, W. ^{[1
]}

机构：

[1] Univ of Sheffield, United Kingdom

来源：

Materials science and engineering | 1988年 / 98卷

关键词：

Crystals - Growing - Heat Treatment - Quenching - Metallography - Segregation - Solid Solutions - Microstructure;

D O I：

10.1016/0025-5416(88)90155-3

中图分类号：

学科分类号：

摘要：

Al-Mn alloys containing between 0.5 and 4.8 wt. percent Mn have been rapidly solidified by tungsten inert gas weld traversing (from 1.3 to 4.8 wt. percent Mn and a solification front velocity Vs from 4.3 to 24 mm s-1) and laser surface melt traversing (from 0.5 to 4.6 wt. percemt Mn and Vs from 40 to 290 mm s-1). Measurements of the manganese content for both unextended and extended α-Al solid solution are in good agreement with the predictions obtained with the model of Kurz, Giovanola and Trivedi for dendritic growth. At sufficiently high growth rates, microsegregation-free microstructures were obtained. The velocity required to produce this structure increased with increasing manganese level, in agreement with the theory of absolute stability of a rapidly advancing planar liquid-solid interface.

引用

页码：201 / 205