CORRELATION BETWEEN MICROSTRUCTURE AND STRESS CORROSION CRACKING SUSCEPTIBILITY OF 2091 ALLOY

Acta Metall Sin

1992, Vol. 28

Issue (6): 59-64 DOI:

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CORRELATION BETWEEN MICROSTRUCTURE AND STRESS CORROSION CRACKING SUSCEPTIBILITY OF 2091 ALLOY

LI Renshun;CHEN Xiangping Harbin Institute of Technology Jianghan petroleum Institute Correspindent Post Box No.423; Harbin Institute of Technology; Harbin 150006

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LI Renshun;CHEN Xiangping Harbin Institute of Technology Jianghan petroleum Institute Correspindent Post Box No.423; Harbin Institute of Technology; Harbin 150006. CORRELATION BETWEEN MICROSTRUCTURE AND STRESS CORROSION CRACKING SUSCEPTIBILITY OF 2091 ALLOY. Acta Metall Sin, 1992, 28(6): 59-64.

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Abstract The stress corrosion cracking (SCC) susceptibility of an Al-Li-Cu-Mg-Zr al-loy (2091), heat-treated under different regimes, has been investigated by means of tensile testat slow strain rate. The microstructures has been examined with TEM. The deformation be-havior has also been analysed. The stress corrosion resistance of the alloy was revealed to bemainly affected by the covering of T_2-phase over grain boundaries and by the average dis-tance between T_2-phase particles. An improvement of SCC resistance may be obviously madeby pre-deforming the alloy at room temperature to reduce the precipitation of T_2-phasealong grain boundaries.

Key words: Al-Li alloy stress corrosion microstructure pre-deformation

Received: 18 June 1992

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1992/V28/I6/59

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