Abstract
1. The highest values of the strength for alloy 1201 are reached in the stage of mixed aging at 125–180° and in the initial stage of complete phase aging at 200–220°. The particle size of the hardening θ′ phase is 1800–2200 A in this case regardless of the aging temperature. The minimal values of the relative elongation correspond to the beginning of complete phase aging. 2. Cold deformation of extruded and forged semifinished products of alloy 1201 after aging leads to an increase in the strength both in the quenched and artificially aged conditions; the relative elongation decreases. 3. Deformation after quenching leads to more-even properties along the height of the forging, a reduction in the fracture toughness, and some increase in the time to failure at 150° as well as in the low-cycle fatigue strength. 4. Cold deformation after quenching of semifinished products of alloy 1201 accelerates the artificial aging process, increases the strength characteristics due to intensification of phase aging, and increases the dispersity and evenness of the distribution of θ′ particles.
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