Heat-treatment of 2014aluminium alloy forgings with intense strain

来源期刊：中国有色金属学报(英文版)2000年第6期

论文作者：宋旼 张新明 杨扬 周卓平 曾苏民 肖亚庆

文章页码：721 - 725

Key words：2014 aluminium alloy forgings; intense strain; solution; aging; mechanical properties

Abstract: The triangular 2014 aluminium alloy forgings with intense strain were made by a variety of heat-treatment processes, and their mechanical properties were measured. The results showed that different solution and aging processes have very strong influence on the mechanical properties of the forgings. The forgings with intense strain from multidirectional deformation (deformation coefficientλ=12), which were solutioned at 500℃for 400 min and aged at 165℃for 10 h, show advanced mechanical properties, and almost no anisotropies. The mechanical properties areσ_b =466MPa,σ_0.2 =454 MPa,δ=10.5% along LD;σ_b =457 MPa,σ_0.2 =444 MPa,δ=6.3% along TD;σ_b =449 MPa,σ_0.2 =433MPa,δ=4.2% along HD. The yield strength of the forgings made by a new process was improved by 30% to 50%, the ultimate tensile strength by 15% to 30% and elongation by 100% to 200%, compared with the mechanical properties of the forgings made by the traditional process. The investigation indicated that the very fine grains (3~6μm) and the submicrophases(0.05~0.15μm), and their homogeneous distribution have made the forgings have the high mechanical properties.