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Microstructural evolutions of molybdenum‑rhenium (47.5 wt.%) alloy under room and high temperature compressions.
- Source :
-
Materials Characterization . Jun2024, Vol. 212, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Act as a candidate for heat pipe reactor core, molybdenum‑rhenium (47.5 wt%) alloy possesses excellent mechanical properties at a wide temperature range (from room temperature to recrystallized temperature). Compressions at varied temperatures and strain rates were given to study the microstructural evolutions of Mo-47.5Re alloy. Yield strength is similar in sample compressed at 400 °C with high strain rate (1.67 × 10−1 /s) and the one at room temperature with low strain rate (1.67 × 10−3 /s). However, deformation twins are only observed under room temperature and are absent as temperature rises to 400 °C. Thus. Twinning in Mo Re alloy is much sensitive to temperature. The microstructure of Mo-47.5Re alloy is quite stable even compression at 1200 °C. Although sub-grains increasing after 1200 °C compressions, no recrystallization was detected. In addition, microstructural evolutions of Mo-47.5Re are outstandingly dependent on strain rates at 400 °C, while are much less obviously at 800 °C and 1200 °C. No phase changes are detected, which verifies good structural stability in Mo-47.5Re. • Deformation twins in Mo-47.5Re are carefully characterized under room temperature compression. • Deformation twins in Mo-47.5Re are absent as compressive temperature rises. • The rate-dependent microstructural evolutions are outstanding at 400 °C, while are much less obvious at 1200 °C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10445803
- Volume :
- 212
- Database :
- Academic Search Index
- Journal :
- Materials Characterization
- Publication Type :
- Academic Journal
- Accession number :
- 177630996
- Full Text :
- https://doi.org/10.1016/j.matchar.2024.114001