scholarly journals Stress-Corrosion Cracking Property of Aluminum-Magnesium Alloy Processed by Equal-Channel Angular Pressing

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Hiroaki Nakano ◽  
Satoshi Oue ◽  
Seiji Taguchi ◽  
Shigeo Kobayashi ◽  
Zenji Horita
2019 ◽  
Vol 37 (1) ◽  
pp. 88-94 ◽  
Author(s):  
Jinghua Jiang ◽  
Qiuyuan Xie ◽  
Mingshan Qiang ◽  
Aibin Ma ◽  
Evans-Kwesi Taylor ◽  
...  

Metals ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 343 ◽  
Author(s):  
Qiuyuan Xie ◽  
Aibin Ma ◽  
Jinghua Jiang ◽  
Zhaojun Cheng ◽  
Dan Song ◽  
...  

Metals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 824 ◽  
Author(s):  
Qingjuan Wang ◽  
Dan Liu ◽  
Libo Tong ◽  
Ying Zhou ◽  
Wei Wang ◽  
...  

The microstructure evolution and stress corrosion cracking (SCC) behaviors of ultrafine-grained (UFG) Cu-Cr-Zr alloys processed by equal-channel angular pressing (ECAP) and coarse-grain (CG) Cu-Cr-Zr alloys within NaNO2 solution were systematically investigated in the current study. After deformation by eight ECAP passes, the grain size was refined to ~200 nm. The slow strain rate tensile (SSRT) tests showed that the ultimate tensile strength (UTS) of CG samples in solution was slightly lower than that in the air, and the elongation was decreased from 57.3% to 52.6%. In contrast, both the UTS and elongation of UFG samples in air and solution were almost identical. In NaNO2 solution, the CG fracture surface showed an obvious dissolution, microvoids, and minor cracks, while the surface of the UFG fracture was relatively smooth. The resistance of UFG samples to SCC could be significantly enhanced compared with CG samples. The grain boundary volume fraction of UFG alloy was dramatically increased, which reduced the formation of pitting corrosion. In addition, the uniform distribution of Cr particles also improved the corrosion resistance of UFG alloys.


2011 ◽  
Vol 10 ◽  
pp. 518-523 ◽  
Author(s):  
Lokesh Choudhary ◽  
Jeremy Szmerling ◽  
Robert Goldwasser ◽  
R.K. Singh Raman

2017 ◽  
Vol 62 (2) ◽  
pp. 557-562 ◽  
Author(s):  
M. Sozańska ◽  
A. Mościcki ◽  
B. Chmiela

Abstract The article shows that the use of quantitative fracture description may lead to significant progress in research on the phenomenon of stress corrosion cracking of the WE43 magnesium alloy. Tests were carried out on samples in air, and after hydrogenation in 0.1 M Na2SO4 with cathodic polarization. Fracture surfaces were analyzed after different variants of the Slow Strain Rate Test. It was demonstrated that the parameters for quantitative evaluation of fracture surface microcracks can be closely linked with the susceptibility of the WE43 magnesium alloy operating under complex state of the mechanical load in corrosive environments. The final result of the study was the determination of the quantitative relationship between Slow Strain Rate Test parameters, the mechanical properties, and the parameters of the quantitative evaluation of fracture surface (microcracks).


2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Zhongwei Yin ◽  
Fengjuan Liu ◽  
Dongdong Song ◽  
Shihuan He ◽  
Jun Lin ◽  
...  

Stress corrosion cracking (SCC) of a forged Mg-Al-Zn magnesium alloy with different surface conditions was studied by the four-point bending test and alternate immersion test in NaCl solution. The results showed that the bare Mg-Al-Zn magnesium alloy has low susceptivity to SCC, and no abrupt rupture happened after the immersion test for 5 days under an initial stress load of 0.15–0.75σ0.2. With microarc oxidation (MAO) coating, corrosion resistance was enhanced, but more surface cracks were induced, and microcracks could be detected inside corrosive pits when the load was 0.75σ0.2, which is similar to the bare alloy. The composite coating totally avoided both SCC and corrosion. The low susceptivity of the forged AQ80M alloy to SCC should be attributed to the fine grain size and even distribution of secondary phases around the grain boundary.


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