Intergranular stress corrosion crack propagation in hot-rolled AZ31 Mg alloy sheet

Casajús, P.; Winzer, N.

doi:10.1016/j.msea.2014.02.077

Cited by 27 publications

(8 citation statements)

References 60 publications

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“…The IG cracking was attributed to the fact that the large grains suffered higher stresses across grain boundaries due to more concentrated dislocation pile-ups. In contrast, Meletis and Hochman [39] observed TG cracking in coarse grain 99.9% pure Mg. Casajus and Winzer [29] studied the stress corrosion crack propagation in hot-rolled AZ31 Mg, and found that crack propagation through fine-grained, recrystallized regions was IG, whereas crack propagation was TG through larger, original grains. Cao et al [20] found the large grain (>400 um) Mg0.1Zr and Mg1Mn suffered IG SCC in distilled water.…”

Section: Page 4 Of 40mentioning

confidence: 99%

“…Some defects and inclusions may also act as H trapping sites, and can influence the SCC behaviour of Mg alloys [28]. β particles may also initiate SCC by their propensity to cause adjacent localized corrosion [27][28][29]. Localized dissolution sites may initiate SCC by the combination of stress concentration, cathodically produced H and a film-free surface for easy H ingress.…”

Section: Introductionmentioning

confidence: 99%

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Stress corrosion cracking of several hot-rolled binary Mg–X alloys

et al. 2015

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Section: Page 4 Of 40mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stress corrosion cracking of several hot-rolled binary Mg–X alloys

et al. 2015

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“…Generally, low surface energy cystallographic planes (i.e. {0001}, {31-40}, {10-11}, {10-10}, {1-101}) and grain boundaries can provide preferential pathways for hydrogen diffusion in Mg alloys 27 43 64 . Thus, the evolved hydrogen atoms can easily diffuse into Mg matrix through those low surface energy planes and grain boundaries underneath the deep localised corrosion areas ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Effect of solution treatment on stress corrosion cracking behavior of an as-forged Mg-Zn-Y-Zr alloy

Wang

et al. 2016

Sci Rep

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Effect of solid solution treatment (T4) on stress corrosion cracking (SCC) behavior of an as-forged Mg-6.7%Zn-1.3%Y-0.6%Zr (in wt.%) alloy has been investigated using slow strain rate tensile (SSRT) testing in 3.5 wt.% NaCl solution. The results demonstrated that the SCC susceptibility index (ISCC) of as-forged samples was 0.95 and its elongation-to-failure (εf) was only 1.1%. After T4 treatment, the SCC resistance was remarkably improved. The ISCC and εf values of T4 samples were 0.86 and 3.4%, respectively. Fractography and surface observation indicated that the stress corrosion cracking mode for as-forged samples was dominated by transgranular and partially intergranular morphology, whereas the cracking mode for T4 samples was transgranular. In both cases, the main cracking mechanism was associated with hydrogen embrittlement (HE). Through alleviating the corrosion attack of Mg matrix, the influence of HE on the SCC resistance of T4 samples can be greatly suppressed.

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“…[5,9] In recent years, the stress corrosion cracking of magnesium alloys, such as AZ, ZK, and Mg-RE, has been studied. [10][11][12][13][14] Stress corrosion cracking of magnesium alloys is usually affected by processing technology, grain structure, different second phases, second phase content and distribution, corrosive environment, and external load, and other factors. [12,[15][16][17][18][19][20][21] Alloying, as an important way to improve the corrosion resistance of magnesium alloys, has attracted considerable attention in improving stress corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gd on microstructure and stress corrosion cracking of the AZ91‐extruded magnesium alloy

Song

Liu

Wang

et al. 2021

Materials & Corrosion

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AZ91 and AZ91-xGd (x = 0.5, 1.0, 1.5 wt%) magnesium alloys are extruded into plates. The addition of Gd promotes the formation of Al 2 Gd, effectively reducing the volume fraction of the β-Mg 17 Al 12 phase and making the banded structures of the extruded magnesium alloys thinner. The corrosion weight loss tests and electrochemistry analyses demonstrate that Gd significantly improves the pitting resistance of the AZ91 in 3.5-wt% NaCl solution saturated with Mg(OH) 2 . Slow strain rate tensile tests show that in a corrosive environment, compared with AZ91, the elongation to failure of the AZ91-1.0Gd alloy is increased by 47%, and the alloy exhibits excellent stress corrosion resistance in this study. The fracture mode of AZ91 is changed from typical intergranular fracture to a mixture of transgranular and intergranular fracture in the corrosion solution by adding Gd. The mechanism of Gd to improve the stress corrosion resistance of the AZ91 magnesium alloy is that Gd increases the corrosion resistance, especially the pitting of AZ91.

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Intergranular stress corrosion crack propagation in hot-rolled AZ31 Mg alloy sheet

Cited by 27 publications

References 60 publications

Stress corrosion cracking of several hot-rolled binary Mg–X alloys

Stress corrosion cracking of several hot-rolled binary Mg–X alloys

Effect of solution treatment on stress corrosion cracking behavior of an as-forged Mg-Zn-Y-Zr alloy

Effect of Gd on microstructure and stress corrosion cracking of the AZ91‐extruded magnesium alloy

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