Effect of Hydrogen Trapping and Poisons on Diffusion Behavior of Hydrogen in Low Carbon Steel

2018 ◽  
Vol 764 ◽  
pp. 3-10 ◽  
Author(s):  
Lian Cai ◽  
Li Min Zhao
Keyword(s):  
Carbon Steel ◽  
Hydrogen Diffusion ◽  
Hydrogen Permeation ◽  
Diffusion Flux ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Hydrogen Trapping ◽  
Diffusion Behavior ◽  
Hydrogen Charging ◽  
And Diffusion

Effect of hydrogen trapping and poisons on diffusion behavior of hydrogen in commercial cold-rolled low carbon steel was investigated by means of electrochemical hydrogen permeation techniques. The experimental results reveal that diffusion rate and diffusion flux of hydrogen in the materials gradually increase with increasing the number of hydrogen charging and outgassing, and lag time significantly shortens with them, therefore, hydrogen trapping impede diffusion behavior of hydrogen in the materials. Different poisons in the hydrogen charging solution have also resulted in a certain influence on the assessment of hydrogen diffusion behavior.

scholarly journals Features of the Hydrogen-Assisted Cracking Mechanism in the Low-Carbon Steel at Ex- and In-situ Hydrogen Charging

2018 ◽  
Vol 13 ◽  
pp. 1141-1147
Author(s):  
E.D. Merson ◽  
P.N. Myagkikh ◽  
V.A. Poluyanov ◽  
D.L. Merson ◽  
A. Vinogradov
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Hydrogen Charging ◽  
Hydrogen Assisted Cracking ◽  
Cracking Mechanism

Effect of Hydrogen Charging on Microstructure Morphology of Warm Rolled Low Carbon Steel

2011 ◽  
Vol 418-420 ◽  
pp. 1076-1080
Author(s):  
Rini Riastuti ◽  
Purnama Riyanti ◽  
Dedi Priadi ◽  
Eddy S. Siradj
Keyword(s):  
Grain Size ◽  
Carbon Steel ◽  
Cathodic Protection ◽  
Bulk Material ◽  
Low Carbon Steel ◽  
Warm Rolling ◽  
Reduction Reaction ◽  
Low Carbon ◽  
Hydrogen Charging ◽  
Microstructure Morphology

Warm rolled deformation is one of deformation technique to improve the strength of steels through the refining grain size of ferritic microstructure. In application, low carbon steel which used in structural industry need some protection against corrosion attack, cathodic protection is usually applied combining with coating. Cathodic protection creates reduction reaction which produces hydrogen, and the hydrogen atom may diffuse into the crystal lattice lead to the Hydrogen Induced Cracking. The present study is to observe the morphology of microstructure influenced by hydrogen charging as the source of hydrogen which attacks the steel surface, and observed by Optical Microscopy and Scanning Electron Microscopy. After warm rolling of 650oC and 35% deformation, ferrite grain size is smaller than bulk material and the hardness value increasing. After tensile test of hydrogen charged steel found the ductile fracture, it means the smaller the ferrite grains size, the resistance of hydrogen attack is increase.

Influence of cementite morphology on the hydrogen permeation parameters of low-carbon steel

1993 ◽  
Vol 12 (6) ◽  
pp. 390-393 ◽  
Author(s):  
A. H. Bott ◽  
D. S. Dos Santos ◽  
P. E. V. De Miranda
Keyword(s):  
Carbon Steel ◽  
Hydrogen Permeation ◽  
Low Carbon Steel ◽  
Low Carbon

Transient Hydrogen Diffusion/Elastoplastic Coupling Analysis for Predicting Fatigue Crack Growth Acceleration of Low-Carbon Steel in Gaseous Hydrogen

2018 ◽  
Author(s):  
Kaito Kawahara ◽  
Masaki Fujikawa ◽  
Junichiro Yamabe
Keyword(s):  
Fatigue Crack ◽  
Carbon Steel ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Hydrogen Concentration ◽  
Hydrogen Diffusion ◽  
Low Carbon Steel ◽  
Hydrogen Energy ◽  
Low Carbon ◽  
Coupling Analysis

In recent years, hydrogen, one of renewable energy, has attracted attention. For widespread commercialization of the hydrogen-energy systems, a useful and reliable evaluation method should be developed for capturing the degradation of strength and fatigue properties of metals in presence of hydrogen. This paper implemented transient hydrogen diffusion-elastoplastic coupling analysis program into a commercial software of Finite Element Analysis (Abaqus) to predict the fatigue crack growth (FCG) acceleration of a low carbon steel (JIS-SM490B) in high-pressure hydrogen gas. For this simulation, hydrogen-diffusion properties (concentration and diffusivity) depending on plastic strain were experimentally obtained. Our thorough numerical results proposed a practical technique to predict an onset of hydrogen-enhanced FCG acceleration measured in experiments, via the numerically obtained gradient of hydrogen concentration at the crack tip. In addition, a practical technique to predict the hydrogen-enhanced FCG acceleration ratio was also discussed based on the gradient of hydrogen concentration.

scholarly journals Effect of Cu on Hydrogen Permeation for the Low Carbon Steel under Mildly Sour Environments

2015 ◽  
Vol 21 (S3) ◽  
pp. 1769-1770
Author(s):  
Haruo Nakamichi ◽  
Kazuhiko Baba ◽  
Daisuke Mizuno ◽  
Kyono Yasuda ◽  
Nobuyuki Ishikawa
Keyword(s):  
Carbon Steel ◽  
Hydrogen Permeation ◽  
Low Carbon Steel ◽  
Low Carbon
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