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Metals 2017, 7(9), 343; doi:10.3390/met7090343

Stress Corrosion Cracking Behavior of Fine-Grained AZ61 Magnesium Alloys Processed by Equal-Channel Angular Pressing

1
College of Mechanics and Materials, Hohai University, Nanjing 210098, China
2
Suqian Institute, Hohai University, Suqian 223800, China
*
Author to whom correspondence should be addressed.
Received: 21 July 2017 / Revised: 25 August 2017 / Accepted: 25 August 2017 / Published: 4 September 2017
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Abstract

The effect of equal-channel angular pressing (ECAP) on stress corrosion cracking (SCC) behavior of a cast AZ61 Mg alloy was investigated in distilled water (DW) using the slow strain rate tensile test (SSRT) at a strain rate of 1 × 10−6 s−1. The fine-grained alloy after ECAP showed a greater SCC susceptibility but a higher ultimate tensile strength, compared with the as-cast counterpart. The results were attributed to refined grains, high-density dislocations and increased proportion of high-angle grain boundaries induced by severe plastic deformation, as well as isolated fine β-phase particles transiting from net-like β-phase. View Full-Text
Keywords: magnesium alloy; stress corrosion cracking; ECAP; fine-grained magnesium alloy; stress corrosion cracking; ECAP; fine-grained
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MDPI and ACS Style

Xie, Q.; Ma, A.; Jiang, J.; Cheng, Z.; Song, D.; Yuan, Y.; Liu, H. Stress Corrosion Cracking Behavior of Fine-Grained AZ61 Magnesium Alloys Processed by Equal-Channel Angular Pressing. Metals 2017, 7, 343.

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