TY - JOUR
T1 - Increase in the local yield stress near surface of austenitic stainless steel due to invasion by hydrogen
AU - Takakuwa, O.
AU - Mano, Y.
AU - Soyama, H.
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI Grant number 24360040 and 25820001 . Some of the results in this work were obtained using supercomputing resources at the Cyberscience Center and using SIMS at the Technical Division, Tohoku University. The authors would like to thank Dr. Takamichi Miyazaki, Technical Division, Tohoku University, for his technical help in the SIMS measurements.
PY - 2014/4/4
Y1 - 2014/4/4
N2 - In order to determine the effect of hydrogen on the local yield stress near the surface of austenitic stainless steel, an indentation test combined with inverse problem analysis was employed. For austenitic stainless steel, the indentation test is an effective method since the hydrogen is distributed near to the surface because of its high solubility and low diffusion coefficient. Although uniaxial tensile tests can also provide useful data, greater variations in the mechanical properties due to the presence of hydrogen can be detected through indentation tests. In this study, Secondary Ion Mass Spectrometry (SIMS) was used to measure hydrogen depth profiles in order to establish the relationships between the hydrogen absorption depth and the effects due to hydrogen evaluated using the indentation test. The results showed that the yield stress doubled due to hydrogen absorption and then reverted to its initial state due to hydrogen desorption at room temperature. Also, hardening due to the presence of hydrogen, which was determined using an indentation test, was found to be dependent on the relationship between the plastic deformation depth and the hydrogen absorption depth.
AB - In order to determine the effect of hydrogen on the local yield stress near the surface of austenitic stainless steel, an indentation test combined with inverse problem analysis was employed. For austenitic stainless steel, the indentation test is an effective method since the hydrogen is distributed near to the surface because of its high solubility and low diffusion coefficient. Although uniaxial tensile tests can also provide useful data, greater variations in the mechanical properties due to the presence of hydrogen can be detected through indentation tests. In this study, Secondary Ion Mass Spectrometry (SIMS) was used to measure hydrogen depth profiles in order to establish the relationships between the hydrogen absorption depth and the effects due to hydrogen evaluated using the indentation test. The results showed that the yield stress doubled due to hydrogen absorption and then reverted to its initial state due to hydrogen desorption at room temperature. Also, hardening due to the presence of hydrogen, which was determined using an indentation test, was found to be dependent on the relationship between the plastic deformation depth and the hydrogen absorption depth.
KW - Hardening
KW - Hydrogen embrittlement
KW - Indentation test
KW - Stainless steel
KW - Yield stress
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U2 - 10.1016/j.ijhydene.2014.01.190
DO - 10.1016/j.ijhydene.2014.01.190
M3 - Article
AN - SCOPUS:84897451438
SN - 0360-3199
VL - 39
SP - 6095
EP - 6103
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 11
ER -
