|
|
Article: Scandium in aluminum alloys.
- Article from:
- Advanced Materials & Processes
- Article date:
- October 1, 1997
- Author:
CopyrightCOPYRIGHT 1997 ASM International. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Aluminum alloys that contain dilute scandium additions display upgraded properties in several areas. In conjunction with zirconium, scandium forms very fine, coherent precipitates that impart strength and serve to inhibit recrystallization in aluminum alloys. In addition, these alloys display improved hot-cracking resistance during welding, and enhanced weld strength. Several scandium-aluminum alloys are currently under development, and some of the more interesting properties are presented in this article.
Effects of scandium
When added to aluminum, scandium is a potent dispersoid-strengthener, grain refiner, and recrystallization inhibitor. Scandium reduces ...