TY - JOUR
T1 - Effect of deformation and charging conditions on crack and blister formation during electrochemical hydrogen charging
AU - Laureys, A.
AU - Van den Eeckhout, E.
AU - Petrov, R.
AU - Verbeken, K.
PY - 2017
Y1 - 2017
N2 - Hydrogen induced cracks were introduced in an ultra-low carbon (ULC) steel by subjecting it to electrochemical hydrogen charging. The damage characteristics were investigated for three material conditions, i.e. cold deformed, recovered, and recrystallized state. The aim of the work was to understand the effect of deformation induced defects on the hydrogen induced cracking of this material. Additionally, the effect of the charging conditions, i.e. charging time and current density, on the cracking characteristics were verified. The blister surfaces and related hydrogen induced cracks were studied by optical microscopy, scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). Deformed samples were considerably more sensitive to hydrogen induced cracking, which demonstrates the important role of dislocations in hydrogen induced damage mechanisms. Permeation tests were performed in order to elucidate the role of hydrogen diffusion in the process. Charging conditions had a clear influence on the hydrogen induced cracking behavior of the material. This should be taken into account when designing experimental parameters in order to obtain results valid under real life conditions.
AB - Hydrogen induced cracks were introduced in an ultra-low carbon (ULC) steel by subjecting it to electrochemical hydrogen charging. The damage characteristics were investigated for three material conditions, i.e. cold deformed, recovered, and recrystallized state. The aim of the work was to understand the effect of deformation induced defects on the hydrogen induced cracking of this material. Additionally, the effect of the charging conditions, i.e. charging time and current density, on the cracking characteristics were verified. The blister surfaces and related hydrogen induced cracks were studied by optical microscopy, scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). Deformed samples were considerably more sensitive to hydrogen induced cracking, which demonstrates the important role of dislocations in hydrogen induced damage mechanisms. Permeation tests were performed in order to elucidate the role of hydrogen diffusion in the process. Charging conditions had a clear influence on the hydrogen induced cracking behavior of the material. This should be taken into account when designing experimental parameters in order to obtain results valid under real life conditions.
KW - Blisters
KW - Cold deformation
KW - EBSD
KW - Hydrogen induced cracking
KW - ULC steel
UR - http://www.scopus.com/inward/record.url?scp=85010693306&partnerID=8YFLogxK
U2 - 10.1016/j.actamat.2017.01.013
DO - 10.1016/j.actamat.2017.01.013
M3 - Article
AN - SCOPUS:85010693306
SN - 1359-6454
VL - 127
SP - 192
EP - 202
JO - Acta Materialia
JF - Acta Materialia
ER -