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ASM Handbook

Heat Treating of Nonferrous Alloys

Edited by
George E. Totten
George E. Totten
Portland State University
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ASM International
Volume
4E
ISBN electronic:
978-1-62708-169-6
Publication date:
2016
Book Chapter

Metallurgy of Heat Treatable Aluminum Alloys

By
D. Scott MacKenzie
D. Scott MacKenzie
Houghton International, Inc.
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Published:
2016
Page range:
65 - 113
Publication history
November 11, 2016

Abstract

This article describes the general categories and metallurgy of heat treatable aluminum alloys. It briefly reviews the key impurities and each of the principal alloying elements in aluminum alloys, namely, copper, magnesium, manganese, silicon, zinc, iron, lithium, titanium, boron, zirconium, chromium, vanadium, scandium, nickel, tin, and bismuth. The article discusses the secondary phases in aluminum alloys, namely, nonmetallic inclusions, porosity, primary particles, constituent particles, dispersoids, precipitates, grain and dislocation structure, and crystallographic texture. It also discusses the mechanisms used for strengthening aluminum alloys, including solid-solution hardening, grain-size strengthening, work or strain hardening, and precipitation hardening. The process of precipitation hardening involves solution heat treatment, quenching, and subsequent aging of the as-quenched supersaturated solid solution. The article briefly discusses these processes of precipitation hardening. It also reviews precipitation in various alloy systems, including 2xxx, 6xxx, 7xxx, aluminum-lithium, and Al-Mg-Li systems.

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D. Scott MacKenzie, 2016. "Metallurgy of Heat Treatable Aluminum Alloys", Heat Treating of Nonferrous Alloys, George E. Totten

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