TY - JOUR
T1 - Hydrogen-assisted fatigue crack growth in ferritic steels - A fractographic study
AU - Wan, Di
AU - Alvaro, Antonio
AU - Olden, Vigdis
AU - Barnoush, Afrooz
N1 - Publisher Copyright:
© The Authors, published by EDP Sciences, 2018.
PY - 2018/5/25
Y1 - 2018/5/25
N2 - Fatigue crack growth (FCG) behavior of a Fe-3wt.%Si ferritic alloy under different environmental conditions using in-situ electrochemical (cathodic) hydrogen (H) charging has been investigated. Three frequencies have been applied. Results clearly show that the FCG rate increased by a factor spanning from 20 to 1000 times, depending on the loading frequencies, when compared to the reference test in air. Lower frequency leads to higher FCG rate. A comprehensive fractographic analysis was carried out: the area fraction of different fracture surface features was measured and taken into statistical analysis. Based on these investigations, the possible mechanisms of H-enhanced FCG are discussed. Similar tests in high-pressure H gas from other studies were also compared and discussed. These results give a preliminary understanding of H effect in fatigue crack propagation procedure in ferritic alloys.
AB - Fatigue crack growth (FCG) behavior of a Fe-3wt.%Si ferritic alloy under different environmental conditions using in-situ electrochemical (cathodic) hydrogen (H) charging has been investigated. Three frequencies have been applied. Results clearly show that the FCG rate increased by a factor spanning from 20 to 1000 times, depending on the loading frequencies, when compared to the reference test in air. Lower frequency leads to higher FCG rate. A comprehensive fractographic analysis was carried out: the area fraction of different fracture surface features was measured and taken into statistical analysis. Based on these investigations, the possible mechanisms of H-enhanced FCG are discussed. Similar tests in high-pressure H gas from other studies were also compared and discussed. These results give a preliminary understanding of H effect in fatigue crack propagation procedure in ferritic alloys.
UR - http://www.scopus.com/inward/record.url?scp=85048114748&partnerID=8YFLogxK
U2 - 10.1051/matecconf/201816503004
DO - 10.1051/matecconf/201816503004
M3 - Conference article
AN - SCOPUS:85048114748
SN - 2261-236X
VL - 165
JO - MATEC Web of Conferences
JF - MATEC Web of Conferences
M1 - 03004
T2 - 12th International Fatigue Congress, FATIGUE 2018
Y2 - 27 May 2018 through 1 June 2018
ER -