Ta-10W 합금의 미세조직과 상온 인장 특성에 미치는 폭발 압접의 영향

초록

This study investigates the effect of explosive bonding on the deformation, microstructure, and room-temperature tensile properties of a Ta-10W alloy. 360 g of emulsion explosive was used with a stand-off distance of 5 mm between the plate and explosive, and the process was conducted. After detonation, the thickness of the Ta-10W alloy was reduced to 2.44 mm, a 4.3 % decrease from the as-rolled plate. The initial microstructure analysis revealed a uniform distribution of Ta and W, the TD plane showing a high substructure fraction after explosive bonding. Tensile stress-strain curve at room temperature of the as-rolled Ta-10W sample showed strain hardening, with a yield strength (YS) of 626.3 ± 15.0 MPa, ultimate tensile strength (UTS) of 709.7 ± 7.1 MPa, and elongation of 32.4 ± 0.5%. After explosive deformation, the YS increased to 765.0 ± 6.6 MPa, UTS to 840.7 ± 13.1 MPa, while elongation decreased to 17.4 ± 2.4%. Analysis of the tensile-deformed microstructure revealed increased misorientation in all regions of the as-rolled sample. In contrast, the explosive bonded sample exhibited higher misorientation along the grain boundary. Based on these findings, the tensile deformation mechanism of explosive bonded Ta-10W alloy was discussed.

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