首页|Effect of tantalum addition method on microstructure and mechanical properties of the 90(W[sbnd]20Ta)–Ni–Fe alloy
Effect of tantalum addition method on microstructure and mechanical properties of the 90(W[sbnd]20Ta)–Ni–Fe alloy
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NSTL
Elsevier
? 2022 Elsevier LtdThe method of adding the initial elements greatly affects the structure and mechanical properties of a tungsten alloy. In this study, the 90(W[sbnd]20Ta)–Ni–Fe alloy was prepared by the direct addition of elements and W[sbnd]Ta pre-alloying. The element diffusion and phase transformation behavior under different states are discussed. The matrix phase to segregate into lumpy Ni3Ta and Fe2Ta phases after sintering by directly adding tantalum, which deteriorated the structure of the alloy. The pre-alloyed group first formed body-centered cubic W[sbnd]Ta solid solution with fine particles through mechanical milling. During the sintering process, the tantalum element gradually precipitated to form the acicular Ni3Ta phase, which improved the uniformity of the microstructure. Through W[sbnd]Ta pre-alloying, the main failure mode transformed from an interfacial fracture to a trans-granular fracture, which increased the strength of the alloy by 130%.
NSTL
Elsevier
