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Title: Impact toughness of commercial and model FeCrAl alloys

Abstract

FeCrAl alloys are under development as possible candidate materials of accident-tolerant fuel cladding in light water reactors. In this paper, the cracking resistance of FeCrAl alloys was evaluated using half-size Charpy impact tests at temperatures ranging from room temperature to 600 °C. Ingot-metallurgy wrought FeCrAl alloys with base alloy compositions of Fe-(10–13)Cr-6Al-2Mo, in weight percent, and commercial powder-metallurgy FeCrAl alloys (Kanthal APMT) were investigated. All studied alloys showed almost zero absorbed impact energy at room temperature with brittle fracture behavior. The as-received APMT alloys exhibited poor impact toughness even at 600 °C. The ductile-brittle transition temperatures of the wrought FeCrAl alloys varied from 119 to 318 °C. Finally, the possible effects of microstructures, residual strain, materials preparation methods, process conditions, and chemical composition on the impact toughness of FeCrAl alloys were investigated by examining the Charpy impact data in combination with microstructural details of the alloys.

Authors:
 [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE), Fuel Cycle Technologies (NE-5)
OSTI Identifier:
1468201
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 734; Journal ID: ISSN 0921-5093
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FeCrAl alloy; Charpy impact test; EBSD; residual strain; thermomechanical processing

Citation Formats

Sun, Zhiqian, Yamamoto, Yukinori, and Chen, Xiang. Impact toughness of commercial and model FeCrAl alloys. United States: N. p., 2018. Web. doi:10.1016/j.msea.2018.07.074.
Sun, Zhiqian, Yamamoto, Yukinori, & Chen, Xiang. Impact toughness of commercial and model FeCrAl alloys. United States. doi:10.1016/j.msea.2018.07.074.
Sun, Zhiqian, Yamamoto, Yukinori, and Chen, Xiang. Sat . "Impact toughness of commercial and model FeCrAl alloys". United States. doi:10.1016/j.msea.2018.07.074. https://www.osti.gov/servlets/purl/1468201.
@article{osti_1468201,
title = {Impact toughness of commercial and model FeCrAl alloys},
author = {Sun, Zhiqian and Yamamoto, Yukinori and Chen, Xiang},
abstractNote = {FeCrAl alloys are under development as possible candidate materials of accident-tolerant fuel cladding in light water reactors. In this paper, the cracking resistance of FeCrAl alloys was evaluated using half-size Charpy impact tests at temperatures ranging from room temperature to 600 °C. Ingot-metallurgy wrought FeCrAl alloys with base alloy compositions of Fe-(10–13)Cr-6Al-2Mo, in weight percent, and commercial powder-metallurgy FeCrAl alloys (Kanthal APMT) were investigated. All studied alloys showed almost zero absorbed impact energy at room temperature with brittle fracture behavior. The as-received APMT alloys exhibited poor impact toughness even at 600 °C. The ductile-brittle transition temperatures of the wrought FeCrAl alloys varied from 119 to 318 °C. Finally, the possible effects of microstructures, residual strain, materials preparation methods, process conditions, and chemical composition on the impact toughness of FeCrAl alloys were investigated by examining the Charpy impact data in combination with microstructural details of the alloys.},
doi = {10.1016/j.msea.2018.07.074},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = ,
volume = 734,
place = {United States},
year = {2018},
month = {7}
}

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