CORRELATION BETWEEN STRESS COMPONENTS AND STRESS CORROSION CRACKS OF BRASS

Acta Metall Sin

1991, Vol. 27

Issue (6): 110-114 DOI:

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CORRELATION BETWEEN STRESS COMPONENTS AND STRESS CORROSION CRACKS OF BRASS

QIAO Lijie;LIU Rui;XIAO Jimei University of Science and Technology Beijing

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QIAO Lijie;LIU Rui;XIAO Jimei University of Science and Technology Beijing. CORRELATION BETWEEN STRESS COMPONENTS AND STRESS CORROSION CRACKS OF BRASS. Acta Metall Sin, 1991, 27(6): 110-114.

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Abstract The effects of the stress components on the nucleation sites and propagation directions of stress corrosion cracks in brass were investigated with specimens under mode Ⅱ and mode Ⅲ loadings. Results indicated that: under mode Ⅱ loading, stress corrosion cracks nucleated on the site with maximum normal stress component and propagated along the plane perpendicular to the maximum normal stress; under mode Ⅲ loading, the stress corrosion crack was not evident on the 45°plane due to the general corrosion in aqueous solution with high NH_4OH concentration, while stress corroded in aqueous solution with low NH_4OH concentration, numerous cracks with spacings of 10-150μm were found on the 45°plane with maximum normal stress and no stress corrosion cracks was observed on the plane with maximum shear stress.

Key words: stress corrosion cracking stress component brass ammonia solution

Received: 18 June 1991

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1991/V27/I6/110

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