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Title: In-situ high-energy X-ray characterization of neutron irradiated HT-UPS stainless steel under tensile deformation

Journal Article · · Acta Materialia
ORCiD logo [1]; ORCiD logo [2];  [2];  [2];  [2];  [2];  [2];  [3]
  1. Univ. of Florida, Gainesville, FL (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Univ. of Florida, Gainesville, FL (United States)

Here, the tensile deformation behavior of a high-temperature, ultrafine-precipitate strengthened (HT-UPS) stainless steel was characterized in-situ with high-energy X-ray diffraction at 20 and 400 °C. The HT-UPS samples were neutron irradiated to 3 dpa at 400 °C. Significant irradiation hardening and ductility loss were observed at both temperatures. Lattice strain evolutions of the irradiated samples showed a strong linear response up to near the onset of the macroscopic yield, in contrast to the unirradiated HT-UPS which showed a pronounced non-linear behavior well below the macroscopic yield. While the room temperature diffraction elastic moduli in the longitudinal direction increased after irradiation, the 400 degrees C moduli were similar before and after irradiation. The evolution of the {200} lattice strain parallel to the loading axis (εL{200}) showed unique characteristics: in the plastic regime, the evolution of (εL{200}) after yield is temperature-dependent in the unirradiated specimens but temperature-independent in the irradiated specimens; and the value of (εL{200}) at the yield is an irradiation-sensitive, temperature-independent . parameter. The evolution of (εL{200}) corresponds well with the dislocation density evolution, and is an effective probe of the deformation-induced long-range internal stresses in the HT-UPS steel.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), Nuclear Energy Enabling Technologies (NEET); USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC02-06CH11357; AC07-051D14517
OSTI ID:
1482550
Alternate ID(s):
OSTI ID: 1601045
Journal Information:
Acta Materialia, Vol. 156, Issue C; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (2)

In situ high-energy X-ray diffraction mapping of Lüders band propagation in medium-Mn transformation-induced plasticity steels journal October 2018
Proton Irradiation Effects on Hardness and the Volta Potential of Welding 308L Duplex Stainless Steel journal December 2018