scholarly journals Hydrogen embrittlement of an Al–Zn–Mg–Cu series alloy with high Zn-content in humid air

2018 ◽  
Vol 68 (11) ◽  
pp. 615-620 ◽  
Author(s):  
Toshiaki Manaka ◽  
Mitsuharu Todai ◽  
Mizuki Wada
Keyword(s):  
Hydrogen Embrittlement ◽  
Humid Air ◽  
Zn Content ◽  
Series Alloy

scholarly journals Change of hydrogen embrittlement behavior of Al^|^ndash;Zn^|^ndash;Mg^|^ndash;Cu alloy with temper in humid air

2013 ◽  
Vol 63 (2) ◽  
pp. 57-64 ◽  
Author(s):  
Shuhei Osaki ◽  
Shigeyuki Haruyama ◽  
Tsuyoshi Koga ◽  
Ken Kaminishi
Keyword(s):  
Hydrogen Embrittlement ◽  
Humid Air ◽  
Cu Alloy

scholarly journals Hydrogen embrittlement properties of notched-aluminum alloy plates in humid air

2007 ◽  
Vol 57 (2) ◽  
pp. 74-79 ◽  
Author(s):  
Shuhei OSAKI ◽  
Jun IKEDA ◽  
Katsuyuki KINOSHITA ◽  
Koji ICHITANI ◽  
Yoshio TAKESHIMA ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Hydrogen Embrittlement ◽  
Humid Air

scholarly journals Hydrogen embrittlement properties of 7075 and 6061 aluminum alloys in humid air

2006 ◽  
Vol 56 (12) ◽  
pp. 721-727 ◽  
Author(s):  
Shuhei OSAKI ◽  
Jun IKEDA ◽  
Katsuyuki KINOSHITA ◽  
Yuzo SASAKI
Keyword(s):  
Aluminum Alloys ◽  
Hydrogen Embrittlement ◽  
Humid Air

scholarly journals First-Principles Estimation of Hydrogen Embrittlement Properties at the Grain Boundary of an Al-Mg-Zn Series Alloy

2014 ◽  
Vol 63 (2) ◽  
pp. 174-181 ◽  
Author(s):  
Tadao FUKUTA ◽  
Kiyotaka OBUNAI ◽  
Koichi OZAKI ◽  
Kosuke KITAURA ◽  
Akihiro TANABE
Keyword(s):  
Hydrogen Embrittlement ◽  
Grain Boundary ◽  
First Principles ◽  
Series Alloy

G030081 Hydrogen embrittlement characteristics of heat treated Al-Mg-Zn series alloy

2012 ◽  
Vol 2012 (0) ◽  
pp. _G030081-1-_G030081-3
Author(s):  
Kosuke KITAURA ◽  
Shinsuke UJIHIRA ◽  
Kiyotaka OBUNAI ◽  
Tadao FUKUTA ◽  
Koichi OZAKI
Keyword(s):  
Hydrogen Embrittlement ◽  
Heat Treated ◽  
Series Alloy

Study on the inhibition of hydrogen embrittlement of 7050 aluminum alloy in humid air by MAO coating

2020 ◽  
Vol 67 (4) ◽  
pp. 387-394
Author(s):  
S.W. Cai ◽  
Y. Zong ◽  
T.S. Hua ◽  
R.G. Song
Keyword(s):  
Hydrogen Embrittlement ◽  
Compressive Stress ◽  
Hydrogen Permeation ◽  
Fracture Morphology ◽  
Thickness Measurement ◽  
Humid Air ◽  
Content Type ◽  
Induced Stress ◽  
7050 Aluminum Alloy ◽  
Micro Arc Oxidation

Purpose This paper aims to verify the inhibition of the hydrogen permeation effect of the coating and to quantitatively and qualitatively characterize the coating-induced stress. Design/methodology/approach By means of slow strain rate tensile testing (SSRT) in humid air, thickness measurement, fracture morphology, cross-section morphology and surface morphology, hydrogen content measurements, flow stress difference method. Findings The results demonstrate that the mechanism of the inhibition of hydrogen embrittlement by the coating is mainly attributed to the repression of hydrogen permeation and the additional coating-induced compressive stress. Originality/value It is proven that the micro-arc oxidation (MAO) coating does inhibit hydrogen entry into the alloy, and the stress induced by the MAO coating is compressive stress, which can restrain the hydrogen embrittlement of the alloy. Therefore, the mechanism of the inhibition of hydrogen embrittlement is dominated by the mechanisms of both hydrogen permeation inhibition and coating-induced stress.

scholarly journals Assessment of hydrogen embrittlement susceptibility of an Al-Cu-Mg alloy in humid air

2020 ◽  
Vol 326 ◽  
pp. 04009
Author(s):  
Toshiaki Manaka ◽  
Takahiro Suzuki ◽  
Keisuke Hiyama ◽  
Junya Kobayashi ◽  
Shigeru Kuromoto ◽  
...  
Keyword(s):  
Hydrogen Embrittlement ◽  
Tensile Test ◽  
Compact Tension ◽  
Mg Alloy ◽  
Rolled Plate ◽  
Humid Air ◽  
Fracture Surfaces ◽  
Test Pieces ◽  
Solution Treated ◽  
Ct Test

In the present study, we investigated the hydrogen embrittlement susceptibility of Al-4%Cu-1.5%Mg alloys subjected to several heat treatments by means of SSRT tensile test and humid gas stress corrosion cracking(HG-SCC) test. For SSRT tensile test, the tensile test pieces were cut from cold-rolled sheets of 1mm thickness. The test pieces were solution-treated at 500 °C for 1h, water-quenched and aged at 140oC for 72h or 360h. SSRT tensile test was performed in two environments, humid air (HA) and dry nitrogen gas (DNG) at a strain rate of 1.39×10-6s-1. Fracture surfaces were observed with a scanning electron microscopy(SEM). For HG-SCC test, compact tension(CT) test pieces were cut from hot-rolled plate of 6mm thickness. The CT test pieces were solution-treated, water-quenched and aged at 190 °C for 9h, 50°C for 96h or 140°C for 72h. HG-SCC test was carried out based on High Pressure Institute of Japan standards; HPIS E103:2018. The pre-cracked CT specimens with stress loading were kept for 90 days in two environments, HA and DNG. After 90 days, in order to observe whether cracks propagated due to HG-SCC, the specimens were loaded up to fracture rapidly, followed by SEM observation. Tensile properties obtained by SSRT tensile tests were almost the same in two environments. Also, fracture surfaces were not affected by test environments. Moreover, in HG-SCC tests, crack propagation was not observed at each test conditions. Therefore, Al-4%Cu-1.5%Mg alloy had high-resistance to hydrogen embrittlement.

Effect of the Electro-Chemical Hydrogen Charging Time on Hydrogen Embrittlement of X70 Steel Using for Gas Pipeline

2013 ◽  
Vol 51 (11) ◽  
pp. 813-820
Author(s):  
Chi-Eun Sung ◽  
Hyeon-Jee Jeon ◽  
Jin-Kyung Lee ◽  
In-Soo Son ◽  
Sang-Pill Lee ◽  
...  
Keyword(s):  
Hydrogen Embrittlement ◽  
Gas Pipeline ◽  
Hydrogen Charging ◽  
Charging Time
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