The plasma-based additive manufacturing of the elemental-mixed refractory high-entropy alloy CrMo0.5NbTa0.5TiZr is investigated with focus on printability, microstructure, thermo-mechanical and oxidation performance. This RHEA exhibited excellent printability, enabling the fabrication of crack-free walls with stable deposition behavior. The microstructure consists of a dual-BCC matrix containing intermetallic phases, as well as a significant fraction of partially reacted Ta- and Mo-rich particles, which persist after heat treatment. Tensile testing at 1000 °C revealed relatively high strength (200.3 ± 5.6 MPa), albeit with very limited ductility. Under compression, this RHEA exhibited both high strength (532.4 ± 8.8 MPa) and appreciable plastic strain (˜70%). Oxidation behavior followed a slightly parabolic trend (Kp = 456 mg²|cm4.h) and was marginally better than typically expected for Zr-containing, Al-free RHEAs.
High-entropy alloys (HEAs) have attracted considerable research interest. Refractory high-entropy alloys (RHEAs), composed primarily of high-melting-point elements (Nb, Mo, Ta, W, Re, Hf, etc.), are of particular interest. These alloys are considered promising for aviation and aerospace applications at temperatures a...
V. Sanin, D. Ikornikov, A. Sivakova et al.· Powder Metallurgy аnd Functi...· 0 citations
γ-TiAl-based alloys are promising lightweight materials for high-temperature applications, but their insufficient oxidation resistance near 800 °C remains a major limitation. This study aims to clarify the short-term oxidation behavior and associated scale/interface evolution of an as-cast Ti-44Al-4Nb-1.5Cr-0.5Mo-0.1B...
The limited thermal stability of conventional aluminium alloys at elevated temperatures restricts their application in laser powder bed fusion (LPBF). In this study, a novel Al6Ca3Cu1.8Mn0.4Zr (wt.%) alloy was developed for improved thermal stability via stable intermetallic phases. LPBF processing of gas-atomised powd...
S. Cherkasov, N. Letyagin, P. A. Palkin et al.· Journal of Manufacturing and...· 0 citations
With surging demand for lightweight, high-strength metal components in high-end equipment and large-scale engineering structures, additive manufacturing of low-alloy ultra-high-strength steel (LUHSS) has become a hot research topic. Wire arc additive manufacturing (WAAM) shows remarkable potential for fabricating large...
Kun Li, Shuang-Jun Zhang, Zi-Che Li et al.· Engineering Science in Addit...· 0 citations
