skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Journal Article · · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
 [1];  [2];  [2];  [2]; ORCiD logo [2]; ORCiD logo [2];  [3];  [2]
  1. Univ. of Science and Technology Beijing, Beijing (China); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Univ. of Science and Technology Beijing, Beijing (China)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
+ Show Author Affiliations

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). Furthermore, 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. Conclusively, the spinodal-decomposition-induced hardening in ferrite and the premature failure of ferrite control the final brittle fracture in the aged DSS.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1503592
Alternate ID(s):
OSTI ID: 1636613
Journal Information:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Vol. 739, Issue C; ISSN 0921-5093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

Figures / Tables (12)

Fig. 1(p. 4)figure Fig. 1
Fig. 2(p. 5)figure Fig. 2
Fig. 3(p. 6)figure Fig. 3
Fig. 4(p. 8)figure Fig. 4
Fig. 5(p. 9)figure Fig. 5
Fig. 6(p. 9)figure Fig. 6
Fig. 7(p. 10)figure Fig. 7
Fig. 8(p. 11)figure Fig. 8
Fig. 9(p. 12)figure Fig. 9
Fig. 10(p. 13)figure Fig. 10
Fig. 11(p. 15)figure Fig. 11
Fig. 12(p. 16)figure Fig. 12

Similar Records

Effects of long-term thermal aging on bulk and local mechanical behavior of ferritic-austenitic duplex stainless steels
Journal Article · Wed Mar 21 00:00:00 EDT 2018 · Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing · OSTI ID:1503592
+2 more
Phase Transformation of Thermally Aged and Neutron Irradiated Duplex Stainless Steel Used in LWRs. Final report
Technical Report · Thu Jan 30 00:00:00 EST 2020 · OSTI ID:1503592
DE-NE0000724 - Research Performance Final Report - Investigation of Thermal Aging Effects on the Evolution of Microstructure and Mechanical Properties of Cast Duplex Stainless Steels
Technical Report · Mon Dec 11 00:00:00 EST 2017 · OSTI ID:1503592
+2 more

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
Duplex stainless steels
High-energy X-ray diffraction
spinodal decomposition
thermal aging