Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study

Yamashita, Takayuki; Koga, Norimitsu; Wenqi, Mao et al.

Materials Science and Engineering: A, 2025, 941, 148602

Number of Access:20（2025-10-05 07:55 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/102608

Link to primary information 

File Format Terms of use Size Views Date.Available Description information
MaterSciEngA_941_148602 pdf None 6.30 MB 16 2025.08.29  
Creative Commons : Attribution - NonCommercial - NoDerivatives

Item Information

Output File Export EndNote Basic Export Mendeley

Title
Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study
Creator
CreatorName
Yamashita, Takayuki
NRID
1000030735923 1000030735923
CreatorName
Koga, Norimitsu
CreatorName
Wenqi, Mao
NRID
1000030780770 1000030780770
CreatorName
Gong, Wu
NRID
1000020626361 1000020626361
CreatorName
Kawasaki, Takuro
NRID
1000040391263 1000040391263
CreatorName
Harjo, Stefanus
NRID
1000000247230 1000000247230
ORCID
0000-0002-5023-3844 0000-0002-5023-3844
researchmap permalink
read0051741 read0051741
Scopus Author ID
7403071460 7403071460
CreatorName
Fujii, Hidetoshi
NRID
1000020343171 1000020343171
CreatorName
Umezawa, Osamu
Subject
Duplex stainless steel
Low temperature
Neutron diffraction
Stacking fault
Stress partitioning
Description
Yamashita T., Koga N., Wenqi M., et al. Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study. Materials Science and Engineering: A 941, 148602 (2025); https://doi.org/10.1016/j.msea.2025.148602.
Abstract
Ferrite-austenite duplex stainless steels exhibit excellent strength and ductility, making them attractive for applications in extreme environments. In this study, in situ neutron diffraction measurements were conducted during tensile testing at 293 K and 200 K to investigate stress partitioning and phase-specific deformation behavior at low temperatures. Phase stress was derived using a texture-compensated method to accurately evaluate stress partitioning and each phase's contribution to the overall strength. Regardless of temperature, ferrite exhibited higher phase stress than austenite, acting as the harder phase. At 200 K, both ferrite and austenite showed increased strength and work hardening, with austenite exhibiting significant stacking fault development in addition to dislocation migration. The plastic deformation mode of ferrite at 200 K was similar to that at 293 K, governed by dislocation migration, but it became more effective. The stress contributions of ferrite and austenite during plastic deformation were comparable at both temperatures. No martensitic transformation was observed in the tested temperature range. The combination of strengthening and enhanced work hardening in both phases contributed to the high strength of duplex stainless steel at 200 K while maintaining ductility comparable to that at 293 K.
Publisher
Elsevier Ltd
Source Title
Materials Science and Engineering: A
Volume (Issue)
941
Page
148602
Date of Issued
2025-06-02
Language
English
Handle URL
https://hdl.handle.net/11094/102608
PISSN
09215093
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.msea.2025.148602
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article