Method for studying weld fusion boundary microstructure evolution in aluminum alloys

被引：0
|
作者：
Kostrivas, A. [1 ]
Lippold, J.C. [1 ]
机构：
[1] Welding and Joining Metallurgy Group, Dept. Indust., Welding Syst. Eng., Ohio State University, Columbus, OH, United States
来源：
| 2000年 / American Welding Soc, Miami, FL, United States卷 / 79期
关键词：
Aluminum alloys - Computer simulation - Crystal microstructure - Heat affected zone - Heating - Melting - Nucleation - Solidification - Temperature control;
D O I：
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学科分类号：
摘要：
In this study, a melting technique was developed to simulate the fusion boundary of aluminum alloys using the Gleeble thermal simulator. Using a steel sleeve to contain the aluminum, samples were heated to incremental temperatures above the solidus temperature of a number of alloys: 2195, 5454-H34, 6061-T6 and 2219-T8. At temperatures above 640°C, solidification in Alloy 2195 occurred by the normal epitaxial nucleation and growth mechanism. Nucleation in the last three alloys was observed to be epitaxial.
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