A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction

Shilei Li; Tiancheng Wang; Qing Tan; Runguang Li; Yanli Wang; Xitao Wang; Yang Ren; Yandong Wang

doi:10.1016/j.msea.2018.10.025

A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction

Shilei Li
, Tiancheng Wang
, Qing Tan
, Runguang Li
, Yanli Wang
, Xitao Wang
, Yang Ren
, Yandong Wang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

22 Citations (Scopus)

Abstract

A direct relationship between the microstructural evolution and macroscopic fracture behaviors of a thermally aged (at 475 °C for 400 h) duplex stainless steel (DSS) has been established with experimental results from atom probe tomography (APT), nanoindentation and in situ synchrotron-based high-energy X-ray diffraction (HE-XRD). The APT experiments demonstrate that ferrite in DSS spinodally decomposes into Cr-enriched and Cr-depleted domains during thermal aging, which leads to a severe hardening effect in ferrite. The lattice strain development during deformation acquired with the in situ HE-XRD measurements confirms the cleavage fracture of α{110} and α{200} ferrite grains aligned perpendicular to loading direction. The thermally aged DSS can be readily fractured by connecting the cleavage cracks in ferrite. The spinodal-decomposition-induced hardening in ferrite and the premature failure of ferrite control the final brittle fracture in the aged DSS.

Original language	English
Pages (from-to)	264-271
Journal	Materials Science and Engineering A
Volume	739
DOIs	https://doi.org/10.1016/j.msea.2018.10.025
Publication status	Published - 2 Jan 2019
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Duplex stainless steels
High-energy X-ray diffraction
Spinodal decomposition
Thermal aging

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https://www.sciencedirect.com/science/article/am/pii/S0921509318313467

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title = "A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction",

abstract = "A direct relationship between the microstructural evolution and macroscopic fracture behaviors of a thermally aged (at 475 °C for 400 h) duplex stainless steel (DSS) has been established with experimental results from atom probe tomography (APT), nanoindentation and in situ synchrotron-based high-energy X-ray diffraction (HE-XRD). The APT experiments demonstrate that ferrite in DSS spinodally decomposes into Cr-enriched and Cr-depleted domains during thermal aging, which leads to a severe hardening effect in ferrite. The lattice strain development during deformation acquired with the in situ HE-XRD measurements confirms the cleavage fracture of α\{110\} and α\{200\} ferrite grains aligned perpendicular to loading direction. The thermally aged DSS can be readily fractured by connecting the cleavage cracks in ferrite. The spinodal-decomposition-induced hardening in ferrite and the premature failure of ferrite control the final brittle fracture in the aged DSS.",

keywords = "Duplex stainless steels, High-energy X-ray diffraction, Spinodal decomposition, Thermal aging",

author = "Shilei Li and Tiancheng Wang and Qing Tan and Runguang Li and Yanli Wang and Xitao Wang and Yang Ren and Yandong Wang",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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doi = "10.1016/j.msea.2018.10.025",

language = "English",

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journal = "Materials Science and Engineering A",

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TY - JOUR

T1 - A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction

AU - Li, Shilei

AU - Wang, Tiancheng

AU - Tan, Qing

AU - Li, Runguang

AU - Wang, Yanli

AU - Wang, Xitao

AU - Ren, Yang

AU - Wang, Yandong

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2019/1/2

Y1 - 2019/1/2

N2 - A direct relationship between the microstructural evolution and macroscopic fracture behaviors of a thermally aged (at 475 °C for 400 h) duplex stainless steel (DSS) has been established with experimental results from atom probe tomography (APT), nanoindentation and in situ synchrotron-based high-energy X-ray diffraction (HE-XRD). The APT experiments demonstrate that ferrite in DSS spinodally decomposes into Cr-enriched and Cr-depleted domains during thermal aging, which leads to a severe hardening effect in ferrite. The lattice strain development during deformation acquired with the in situ HE-XRD measurements confirms the cleavage fracture of α{110} and α{200} ferrite grains aligned perpendicular to loading direction. The thermally aged DSS can be readily fractured by connecting the cleavage cracks in ferrite. The spinodal-decomposition-induced hardening in ferrite and the premature failure of ferrite control the final brittle fracture in the aged DSS.

AB - A direct relationship between the microstructural evolution and macroscopic fracture behaviors of a thermally aged (at 475 °C for 400 h) duplex stainless steel (DSS) has been established with experimental results from atom probe tomography (APT), nanoindentation and in situ synchrotron-based high-energy X-ray diffraction (HE-XRD). The APT experiments demonstrate that ferrite in DSS spinodally decomposes into Cr-enriched and Cr-depleted domains during thermal aging, which leads to a severe hardening effect in ferrite. The lattice strain development during deformation acquired with the in situ HE-XRD measurements confirms the cleavage fracture of α{110} and α{200} ferrite grains aligned perpendicular to loading direction. The thermally aged DSS can be readily fractured by connecting the cleavage cracks in ferrite. The spinodal-decomposition-induced hardening in ferrite and the premature failure of ferrite control the final brittle fracture in the aged DSS.

KW - Duplex stainless steels

KW - High-energy X-ray diffraction

KW - Spinodal decomposition

KW - Thermal aging

UR - https://www.scopus.com/pages/publications/85055056326

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85055056326&origin=recordpage

U2 - 10.1016/j.msea.2018.10.025

DO - 10.1016/j.msea.2018.10.025

M3 - RGC 21 - Publication in refereed journal

SN - 0921-5093

VL - 739

SP - 264

EP - 271

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction

Abstract

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