TY - JOUR
T1 - Grain boundary engineering for improving stress corrosion cracking of 304 stainless steel
AU - Liu, Tingguang
AU - Bai, Qin
AU - Ru, Xiangkun
AU - Xia, Shuang
AU - Zhong, Xiangyu
AU - Lu, Yonghao
AU - Shoji, Tetsuo
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (51701017, 51671122 and 51871144) and Beijing Natural Science Foundation (2182044).
Publisher Copyright:
© 2019, © 2019 Institute of Materials, Minerals and Mining.
PY - 2019/3/4
Y1 - 2019/3/4
N2 - Grain boundary engineering (GBE) via low strain tension and annealing was used to enhance the resistance to stress corrosion cracking of a 304 stainless steel. Electron backscattered diffraction (EBSD) analysis exhibited that the GBE steel had a higher fraction of low-∑ coincidence site lattice (CSL) boundaries, larger grain-clusters, longer twin boundary chains, and fewer paths of connected non-twin boundaries with a more zigzag shape. Slow strain rate tests in high-temperature water showed that the GBE steel performed better plasticity, higher tensile strength, and similar yield strength compared to conventional steel. The low fraction of random boundaries in GBE steel resulted in a lower frequency of intergranular crack initiation, and the zigzag paths of non-twin boundaries made the intergranular crack propagation more difficult.
AB - Grain boundary engineering (GBE) via low strain tension and annealing was used to enhance the resistance to stress corrosion cracking of a 304 stainless steel. Electron backscattered diffraction (EBSD) analysis exhibited that the GBE steel had a higher fraction of low-∑ coincidence site lattice (CSL) boundaries, larger grain-clusters, longer twin boundary chains, and fewer paths of connected non-twin boundaries with a more zigzag shape. Slow strain rate tests in high-temperature water showed that the GBE steel performed better plasticity, higher tensile strength, and similar yield strength compared to conventional steel. The low fraction of random boundaries in GBE steel resulted in a lower frequency of intergranular crack initiation, and the zigzag paths of non-twin boundaries made the intergranular crack propagation more difficult.
KW - grain boundary engineering
KW - slow strain rate testing
KW - Stainless steel
KW - stress corrosion cracking
KW - twin boundary
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U2 - 10.1080/02670836.2019.1570661
DO - 10.1080/02670836.2019.1570661
M3 - Article
AN - SCOPUS:85060786649
SN - 0267-0836
VL - 35
SP - 477
EP - 487
JO - Materials Science and Technology
JF - Materials Science and Technology
IS - 4
ER -