Stress Corrosion Cracking in Welds of Al-Zn-Mg Series 7N01-T4 Alloy

敏男, 圓城; 敏雄, 黒田

doi:10.2472/jsms.29.617

Journal of the Society of Materials Science, Japan

1980

DOI: 10.2472/jsms.29.617

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Stress Corrosion Cracking in Welds of Al-Zn-Mg Series 7N01-T4 Alloy

圓城敏男¹,

黒田敏雄²

Abstract: An investigation was made on the effect of microstructure on the stress corrosion cracking

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Effect of Aging Treatment on the Corrosion Resistance Properties of 7N01 Extrusion Aluminum Alloy

Qin

Yu³

et al. 2021

Materials

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The influences of non-isothermal aging (the temperature range is 150–180 °C, and the heating rate is 5 and 20 °C/h alternately), single-peak aging (aging at 120 °C for 24 h, then water quenched was followed at room temperature), and two-stage aging (aging at 105 °C for 8 h first, then increasing aging temperature to 135 °C and keeping for 12 h, followed by water quenching at room temperature) on the corrosion resistance and microstructure of the 7N01 aluminum alloy under 3.5 wt.% NaCl were investigated using electric polarization curve test and exfoliation corrosion. After aging, the hardness of samples was measured by a Vickers micro-hardness tester, and the electrical conductivities were obtained using the eddy current method. The results show that the steady phase η and metastable phase η′ are precipitated in the grain boundary of 7N01 aluminum alloy after non-isothermal aging, and their distribution is discontinuous. The hardness of the alloy can reach 136.9 HV1 and the electrical conductivity can reach 35.8% IACS, which is close to the hardness of single-peak aging and the conductivity of two-stage aging, respectively. Compared with single-peak aging, the corrosion current density of non-isothermal aging is reduced by 15.5%, and that of two-stage aging is reduced by 28.9%.

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Effect of Aging Treatment on the Corrosion Resistance Properties of 7N01 Extrusion Aluminum Alloy

Qin

Yu³

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

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Stress Corrosion Cracking in Welds of Al-Zn-Mg Series 7N01-T4 Alloy

Abstract: An investigation was made on the effect of microstructure on the stress corrosion cracking

Cited by 1 publication

References 0 publications

Effect of Aging Treatment on the Corrosion Resistance Properties of 7N01 Extrusion Aluminum Alloy

Effect of Aging Treatment on the Corrosion Resistance Properties of 7N01 Extrusion Aluminum Alloy

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