TY - JOUR
T1 - Effects of strain rate on mechanical properties of heterogeneous nano-structured SUS316LN stainless steel
T2 - Revealed by in-situ X-Ray diffraction at synchrotron radiation facility
AU - Jiang, Hua
AU - Watanabe, Chihiro
AU - Miyajima, Yoji
AU - Koga, Norimitsu
AU - Aoyagi, Yoshiteru
AU - Kobayashi, Masakazu
AU - Miura, Hiromi
N1 - Funding Information:
This work was financially supported by Japan Science and Technology Agency (JST) under Industry-Academia Collaborative R&D Program ?Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials? (Grant #: JPMJSK1413). The synchrotron radiation experiments were performed at BL46XU of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI), (Proposal No. 2013A1788, 2013B1567, 2017A1765, 2013B1706,2018B1574 and 2019B1884). The authors would appreciate Dr. M. Sato for the support at SPring-8.
Funding Information:
This work was financially supported by Japan Science and Technology Agency (JST) under Industry-Academia Collaborative R&D Program “Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials” (Grant #: JPMJSK1413 ). The synchrotron radiation experiments were performed at BL46XU of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI), (Proposal No. 2013A1788, 2013B1567, 2017A1765, 2013B1706,2018B1574 and 2019B1884). The authors would appreciate Dr. M. Sato for the support at SPring-8.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/5/20
Y1 - 2021/5/20
N2 - A SUS316LN austenitic stainless steel was heavily cold rolled to develop heterogeneous nano (HN)-structure. And the effects of strain rate on the tensile deformation behavior of the HN-structured SUS316LN stainless steel were investigated. For this purpose, changes in lattice defect densities, such as dislocation density and stacking fault probability, during the tensile tests were investigated by means of in-situ X-ray diffraction (XRD) measurements at a synchrotron facility. The strength and elongation to failure simultaneously increased with increasing applied strain rate. The analyses of XRD profiles and microstructural observation revealed that twin fault probability as well as dislocation density and stacking fault probability increased with increasing strain rate. The more enhanced formation of ultra-fine twins by the increase in strain rate led to higher work hardening and resulted in more excellent strength/ductility balance.
AB - A SUS316LN austenitic stainless steel was heavily cold rolled to develop heterogeneous nano (HN)-structure. And the effects of strain rate on the tensile deformation behavior of the HN-structured SUS316LN stainless steel were investigated. For this purpose, changes in lattice defect densities, such as dislocation density and stacking fault probability, during the tensile tests were investigated by means of in-situ X-ray diffraction (XRD) measurements at a synchrotron facility. The strength and elongation to failure simultaneously increased with increasing applied strain rate. The analyses of XRD profiles and microstructural observation revealed that twin fault probability as well as dislocation density and stacking fault probability increased with increasing strain rate. The more enhanced formation of ultra-fine twins by the increase in strain rate led to higher work hardening and resulted in more excellent strength/ductility balance.
KW - Dislocation density
KW - Heterogeneous nano-structure
KW - In-situ X-ray measurement
KW - Mechanical twin
KW - SUS316LN stainless Steel
KW - Synchrotron radiation
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U2 - 10.1016/j.msea.2021.141251
DO - 10.1016/j.msea.2021.141251
M3 - Article
AN - SCOPUS:85104687537
VL - 815
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
M1 - 141251
ER -