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

Author(s)

Shilei Li
Tiancheng Wang
Qing Tan
Runguang Li
Yanli Wang
Xitao Wang
Yandong Wang

Detail(s)

Original language	English
Pages (from-to)	264-271
Journal / Publication	Materials Science and Engineering A
Volume	739
Publication status	Published - 2 Jan 2019
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.msea.2018.10.025 Final Published version
	Check@CityULib
Document Link	Links https://www.sciencedirect.com/science/article/am/pii/S0921509318313467 Post-print
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85055056326&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(e3516a00-f15f-4f58-b20a-3d37f3e44b9f).html

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.

Research Area(s)

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

Bibliographic 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].

Citation Format(s)

[ RIS ] [ BibTeX ]

A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction. / Li, Shilei; Wang, Tiancheng; Tan, Qing et al.
In: Materials Science and Engineering A, Vol. 739, 02.01.2019, p. 264-271.

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

Li, S, Wang, T, Tan, Q, Li, R, Wang, Y, Wang, X, Ren, Y & Wang, Y 2019, 'A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction', Materials Science and Engineering A, vol. 739, pp. 264-271. https://doi.org/10.1016/j.msea.2018.10.025

Li, S., Wang, T., Tan, Q., Li, R., Wang, Y., Wang, X., Ren, Y., & Wang, Y. (2019). A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction. Materials Science and Engineering A, 739, 264-271. https://doi.org/10.1016/j.msea.2018.10.025

Li S, Wang T, Tan Q, Li R, Wang Y, Wang X et al. A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction. Materials Science and Engineering A. 2019 Jan 2;739:264-271. doi: 10.1016/j.msea.2018.10.025

Li, Shilei ; Wang, Tiancheng ; Tan, Qing et al. / A brittle fracture mechanism in thermally aged duplex stainless steels revealed by in situ high-energy X-ray diffraction. In: Materials Science and Engineering A. 2019 ; Vol. 739. pp. 264-271.