SYMPOSIA PAPER Published: 01 January 1976
STP27801S

Microstructure and Toughness of High-Strength Aluminum Alloys

Source

The toughness of wrought, high-strength aluminum alloys is related to the amount, type, and morphology of coarse (larger than about 1 μm) constituent particles, intermediate size (about 0.02 to 0.5 µm) dispersoids, and fine (down to about 0.001 µm) precipitates. High toughness can be attained by minimizing the size and volume fraction of constituent particles, increasing the interdispersoid distance, refining the intragranular precipitate in 2XXX alloys, and controlling the intergranular precipitate in 7XXX alloys. For highest toughness in 7XXX alloy products where low residual stress is desired, rapid quenching followed by the minimum amount of cold work required for mechanical stress relief is recommended.

Author Information

Staley, JT
Physical Metallurgy Division, Alcoa Laboratories, Alcoa Technical Center, Alcoa Center, Pa.
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Details
Developed by Committee: E08
Pages: 71–103
DOI: 10.1520/STP27801S
ISBN-EB: 978-0-8031-4679-2
ISBN-13: 978-0-8031-0540-9