SUPERPLASTIC DEFORMATION BEHAVIOUR OF SUPERHARD Al ALLOY LC4

Acta Metall Sin

1990, Vol. 26

Issue (4): 158-160 DOI:

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SUPERPLASTIC DEFORMATION BEHAVIOUR OF SUPERHARD Al ALLOY LC4

JIANG Xinggang;WU Qingling;CUI Jianzhong;MA Longxiang Northeast University of Technology; Shenyang Department of Metal Working; Northeast University of Technclogy;Shenyang 110006

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JIANG Xinggang;WU Qingling;CUI Jianzhong;MA Longxiang Northeast University of Technology; Shenyang Department of Metal Working; Northeast University of Technclogy;Shenyang 110006. SUPERPLASTIC DEFORMATION BEHAVIOUR OF SUPERHARD Al ALLOY LC4. Acta Metall Sin, 1990, 26(4): 158-160.

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Abstract The superplasticity of the high strength and hard Al alloy LC4 was improved toa great extent by modified thermomechanic treatment. Its maximum elongation may be up to2100% under deformation with initial strain rate 8.33×10~(-4)s~(-1) at 510℃. The optical and TEMobservations of the microstructure changes revealed that with thein crease of deformation, the dis-location density increases, the grain grows and the alloy exhibits strain hardening. The excel-lent elongation of the alloy seems due to the increase of grain stability under deformation.

Key words: superplasticity thermomechanic treatment artificial aging superhard Al alloy

Received: 18 April 1990

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1990/V26/I4/158

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