Method of improving transverse direction mechanical properties o

Details Method of improving transverse direction mechanical properties o Method of improving transverse direction mechanical properties o

1993-03-12

1995-01-24

Andrews, Melvyn J.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148415, 148416, 148417, 148418, 148698, 148699, 148700, 148701, 148702, 148437, 148438, 148439, 148440, C22F 104

Patent

active

053839862

ABSTRACT:
Strength and ductility for a aluminum-lithium alloy wrought product in the transverse direction is improved by subjecting these types of alloys to improved T8 temper practice. The wrought product, after solution heat treating and quenching is subjected to a multiple step stretching sequence prior to aging, the total percent reduction for the multiple step stretching sequence ranging between 1 and 20 percent reduction. In the multiple step stretching sequence, each of the stretching steps may have the same or different amounts of percent reduction to achieve the desired total percent reduction. An aluminum-lithium alloy wrought product subjected to the improved T8 temper practice has increased tensile yield stress and percent elongation in its transverse direction to facilitate commercial application of the product in high strength applications.

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