Impact toughness of commercial and model FeCrAl alloys

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:734

Article

Sun, Zhiqian¹  Yamamoto, Yukinori¹  Chen, Xiang¹ 

[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

关键词: FeCrAl alloy;    Charpy impact test;    EBSD;    Residual strain;    Thermomechanical processing;   

DOI  :  10.1016/j.msea.2018.07.074

来源: Elsevier

【 摘 要 】

FeCrAl alloys are under development as possible candidate materials of accident-tolerant fuel cladding in light water reactors. In this study, the cracking resistance of FeCrAl alloys was evaluated using half-size Charpy impact tests at temperatures ranging from room temperature to 600 degrees 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 degrees C, The ductile-brittle transition temperatures of the wrought FeCrAl alloys varied from 119 to 318 degrees C. 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.

【 授权许可】

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