EFFECT OF Zn ON AGING RESPONSE OF Al-Li-Cu-Mg-Zr ALLOY

Acta Metall Sin

1993, Vol. 29

Issue (12): 1-7 DOI:

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EFFECT OF Zn ON AGING RESPONSE OF Al-Li-Cu-Mg-Zr ALLOY

JIANG Xiaojun;DENG Wen;GUI Quanhong;LI Yiyi;XIONG Liangyue;SHI Changxu Institute of Metal Research; Academia Sinica; Shenyang

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JIANG Xiaojun;DENG Wen;GUI Quanhong;LI Yiyi;XIONG Liangyue;SHI Changxu Institute of Metal Research; Academia Sinica; Shenyang. EFFECT OF Zn ON AGING RESPONSE OF Al-Li-Cu-Mg-Zr ALLOY. Acta Metall Sin, 1993, 29(12): 1-7.

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Abstract

Effect of Zn on age hardening, microstructure, defects and electronic structurein matrix of Al-Li-Cu-Mg-Zr alloy has been investigated. The addition of Zn to the alloysignincantly influences the precipitation, aging and positron annihilation parameters. TheZn-containing alloys exhibit stronger hardening tendency and higher value of hardness.Moreover, the presence of Zn may delay the growth of δ' particles and stimulate the precipita-tion and uniform distribution of S' phase. After aged for along time, coarse lath-like phasesrich in Zn would precipitate both in matrix and at grain boundaries in the Zn-containing al-loys.

Key words: Al-Li alloy age hardening microstructure Zn

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1993/V29/I12/1

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