TY - JOUR
T1 - Work-hardening mechanism in high-nitrogen austenitic stainless steel
AU - Masumura, Takuro
AU - Seto, Yuki
AU - Tsuchiyama, Toshihiro
AU - Kimura, Ken
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP18K14016. We would like to thank Prof. Sigeo Sato (Ibaraki University), Prof. Emeritus Setsuo Takaki and Dr. Daichi Akama (Kyushu University) for their advice on X-ray line profile analysis.
PY - 2020
Y1 - 2020
N2 - The remarkably high work-hardening rate in high-nitrogen austenitic stainless steels is generally believed to be due to the promotion of dislocation accumulation by nitrogen addition. However, analysis of dislocation accumulation behavior by the modified Williamson-Hall/ Warren-Averbach method reveals that no difference to the increment of the dislocation density during deformation exists between austenitic steels with and without nitrogen. Since cross slipping is markedly suppressed in high-nitrogen steels, the moving dislocations are back-stressed by the planar dislocation arrays. This induces the deformation resistance and the high work-hardening rate.
AB - The remarkably high work-hardening rate in high-nitrogen austenitic stainless steels is generally believed to be due to the promotion of dislocation accumulation by nitrogen addition. However, analysis of dislocation accumulation behavior by the modified Williamson-Hall/ Warren-Averbach method reveals that no difference to the increment of the dislocation density during deformation exists between austenitic steels with and without nitrogen. Since cross slipping is markedly suppressed in high-nitrogen steels, the moving dislocations are back-stressed by the planar dislocation arrays. This induces the deformation resistance and the high work-hardening rate.
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U2 - 10.2320/matertrans.H-M2020804
DO - 10.2320/matertrans.H-M2020804
M3 - Article
AN - SCOPUS:85082386061
SN - 0916-1821
VL - 61
SP - 678
EP - 684
JO - Materials Transactions
JF - Materials Transactions
IS - 4
ER -