Abstract
Aluminum has been the material of choice in the transportation sector, including automotive and aerospace industries, for more than 80 years. Pure aluminum is quite soft, and it is made usable for different service conditions by alloying, heat treatment, or working. Except for a few nonheat-treatable alloys, aluminum alloys are hardened by solution treatment and quenching, followed by natural or artificial aging. In addition, annealing treatment is sometimes used to soften work-hardened products. Quenching media and rate, solution treatment, and aging responses are discussed in this chapter, with highlights of schedules of heat treatment for different wrought and cast aluminum alloys.
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