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| THERMOMECHANICAL TREATMENT OF A SUPERSATURATED SOLID SOLUTION OF LD-2 ALUMINIUM ALLOY |
| ZHENG Yangzeng; WANG Yulin; LIU Defu (The Northeast Heavy Machinery Institute; Fulaerji; Heilongjiang) (Manuscript received 27 August; 1985; revised manuscript 17 April; 1986) |
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Cite this article:
ZHENG Yangzeng; WANG Yulin; LIU Defu (The Northeast Heavy Machinery Institute; Fulaerji; Heilongjiang) (Manuscript received 27 August; 1985; revised manuscript 17 April; 1986). THERMOMECHANICAL TREATMENT OF A SUPERSATURATED SOLID SOLUTION OF LD-2 ALUMINIUM ALLOY. Acta Metall Sin, 1987, 23(2): 118-239.
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Abstract Hot torsion tests were carried out on supersaturated solid solution of an aluminium alloy containing 0.7% Mg and 0.97%Si. The flow curves at 480/400/ 270℃ and a strain rate of 1.31s~(-1) were measured. The dynamic structure changes and their influences on the subsequent aging behavior of the alloy quenched immediately after hot deformation were investigated. It has been found that the aginghardening ability and the time to the peak hardness of the supersaturated solid solution quenched directly after hot deformation are related to the dynamic precipitation of Mg_2Si. Under the conditions of absence or presence of a small amount of the precipitates, the ability is about 15% higher and the time is an order of magnitude shorter for the sample quenched immediately after deformation than for that quenched conventionally. The microstructure of the sample hot deformed, directly quenched and aged is charactrized by existence of recovery substructure as well as much finer dispersive aging precipitates.
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Received: 18 February 1987
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6 金子纯一.热处理,1981;21:331 |
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