2021
DOI: 10.1557/s43578-020-00026-z
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Controlling the high temperature deformation behavior and thermal stability of ultra-fine-grained W by re alloying

Abstract: Due to their outstanding properties, ultra-fine-grained tungsten and its alloys are promising candidates to be used in harsh environments, hence it is crucial to understand their high temperature behavior and underlying deformation mechanisms. Therefore, advanced nanoindentation techniques were applied to ultra-fine-grained tungsten–rhenium alloys up to 1073 K. A continuous hardness decrease up to 0.2 $$T_{\text{m}}$$ T m … Show more

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Cited by 4 publications
(3 citation statements)
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“…[ 64,199,205–209 ] Furthermore, despite a slightly lowered melting temperature when alloying (e.g., T m ≈ 3200 °C = 3473 K for W‐10Re), Re additions enhance the thermal stability and decrease the thermodynamic driving force for recrystallization and grain growth, thus helping to stabilize grain structure and mechanical properties at the elevated temperatures (hereby termed as the “stabilizing effect”). [ 210–214 ]…”
Section: Recent Progress In Sintered Refractory Metals Alloys and Com...mentioning
confidence: 99%
See 1 more Smart Citation
“…[ 64,199,205–209 ] Furthermore, despite a slightly lowered melting temperature when alloying (e.g., T m ≈ 3200 °C = 3473 K for W‐10Re), Re additions enhance the thermal stability and decrease the thermodynamic driving force for recrystallization and grain growth, thus helping to stabilize grain structure and mechanical properties at the elevated temperatures (hereby termed as the “stabilizing effect”). [ 210–214 ]…”
Section: Recent Progress In Sintered Refractory Metals Alloys and Com...mentioning
confidence: 99%
“…[64,199,[205][206][207][208][209] Furthermore, despite a slightly lowered melting temperature when alloying (e.g., T m ≈ 3200 °C = 3473 K for W-10Re), Re additions enhance the thermal stability and decrease the thermodynamic driving force for recrystallization and grain growth, thus helping to stabilize grain structure and mechanical properties at the elevated temperatures (hereby termed as the "stabilizing effect"). [210][211][212][213][214] On the processing side, like W, W-Re alloys are commonly fabricated through the PM route, where powder compacts are partially pre-densified by pressureless sintering at high temperatures (>2000 °C) then followed by further densification steps such as HIP or thermomechanical processing. [17,213] For sintered products, improving the density, refining, and homogenizing the microstructure are critical to many application-oriented properties, including solving the brittleness problem of W alloys.…”
Section: Tungsten-rhenium Alloysmentioning
confidence: 99%
“…Owing to intense research and development activities during the past decade, nanoindentation has been successfully expanded to applications at high temperatures. This has proven highly beneficial for investigating not only the deformation behavior of high-temperature materials [37,38], but also the fundamental effects of heat treatments [31]. In addition, the focus issue features a study conducted at cryogenic temperatures [39], which underscores that progress is also being made in this direction.…”
Section: Extreme Testing Environmentsmentioning
confidence: 99%