| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Steels for Sustainable Development
|
| Presentation Title |
Influence of C and N on Hydrogen Embrittlement in
17Cr-10Ni-6Mn Stable Austenitic Stainless Steel
|
| Author(s) |
Yeonggeun Cho, Hyung-Jun Cho, Sung-Joon Kim |
| On-Site Speaker (Planned) |
Yeonggeun Cho |
| Abstract Scope |
17Cr-10Ni-6Mn stable austenitic stainless steels containing 0.2 wt.% of C or N were hydrogen charged and tensile tested to compare the effect of interstitial elements on hydrogen embrittlement (HE). Addition of C or N increased the tensile strength and decreased the HE susceptibility, and improvement of HE resistance was greater by C than by N. Improvement of strength and HE resistance by C or N addition are mainly attributed to expansion of austenite lattice and increase of activation energy for hydrogen desorption. N showed lower solid solution hardening and less degree of twinning than C, which resulted in lower tensile strength in N-added steel. Activation energy for hydrogen desorption was higher in C-added steels, indicating that C was more effective on decreasing the hydrogen diffusivity, which corresponds to smaller depth of hydrogen-affected zone. In addition, N promoted planar slip and accelerated localized deformation, which contributed to higher HE susceptibility. |