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Title: Method for Evaluating Irradiation Effects on Flow Stress in Fe-9%Cr ODS Using TEM In Situ Cantilevers

Journal Article · · JOM. Journal of the Minerals, Metals & Materials Society
ORCiD logo [1];  [2];  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Purdue Univ., West Lafayette, IN (United States)
  2. Boise State Univ., ID (United States); Center for Advanced Energy Studies, Idaho Falls, ID (United States)
  3. Purdue Univ., West Lafayette, IN (United States)

Transmission electron microscopic (TEM) in situ mechanical testing has become a widely utilized tool for simultaneously measuring mechanical properties and understanding fundamental deformation mechanisms in irradiated and nuclear materials. Although tensile and compression specimen geometries are amongst the most common, opportunities remain for investigating alternative geometries that could provide unique insights into the plasticity of irradiated materials. This research demonstrates a new TEM in situ cantilever beam configuration. Cantilevers are produced from as-received and proton irradiated (1 dpa, 500°C) Fe-9%Cr oxide dispersion strengthened (ODS) steel. Flow stress is measured using a TEM in situ depth-sensing mechanical testing holder. A 200 MPa increase in flow stress is measured due to irradiation. Size effects arise when the intrinsic (i.e. microstructural) size approaches the extrinsic (i.e. external dimensions) size and can be described using a power law relationship as a function of the material microstructure and cantilever dimensions.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); National Science Foundation (NSF)
Grant/Contract Number:
AC05-76RL01830; NE0008758; DMR-17-52636; 15-540; 16-656; 18-1168
OSTI ID:
1633613
Report Number(s):
PNNL-SA-151821
Journal Information:
JOM. Journal of the Minerals, Metals & Materials Society, Vol. 72, Issue 5; ISSN 1047-4838
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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