期刊
JOM
卷 71, 期 10, 页码 3368-3377出版社
SPRINGER
DOI: 10.1007/s11837-019-03714-2
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类别
资金
- Bruker Nano Surfaces
- US Department of Energy's NNSA [89233218CNA000001]
Development of structural materials for service under extreme conditions is slowed by the lack of high-throughput test protocols. Here, a method that integrates high-throughput nanoindentation mapping with precise temperature control under a vacuum atmosphere is demonstrated. High-entropy alloys (HEAs) may possess the strength and stability required of high-temperature structural materials in next-generation nuclear applications. These alloys, including the compositional variation AlxFeCrNiMn (x = 0, 0.3, 1) presented in this work, have distinct microstructural morphologies, and nanoindentation mapping reveals the mechanical behavior of the distinct phases as a function of temperature up to 400 degrees C. FeCrNiMn (Al = 0) consists of a face-centered cubic (FCC) matrix with body-centered cubic (BCC) precipitates and exhibits significant softening in both phases at elevated temperature. In contrast, both the FCC phase and FCC-BCC phases present in Al0.3FeCrNiMn show approximately 90% retention of the room temperature hardness at 400 degrees C, and AlFeCrNiMn with BCC and B2 structures shows a similar 85% retention of hardness.
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