Microstructure and Properties of Dual Phase Ta-TaCr<sub>2</sub> Alloy Prepared by Vacuum Hot Pressing

Sun Guilin; Xiao Xuan; Hu Kongsheng; Wei Shishi

doi:10.15980/j.tzzz.2022.11.020

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Microstructure and Properties of Dual Phase Ta-TaCr₂ Alloy Prepared by Vacuum Hot Pressing
Vol. 42, Issue 11, Pages: 1415-1418(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.11.020

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Sun Guilin, Xiao Xuan, Hu Kongsheng, et al. Microstructure and Properties of Dual Phase Ta-TaCr₂ Alloy Prepared by Vacuum Hot Pressing. [J]. Special Casting & Nonferrous Alloys 42(11):1415-1418(2022)
DOI：

Sun Guilin, Xiao Xuan, Hu Kongsheng, et al. Microstructure and Properties of Dual Phase Ta-TaCr₂ Alloy Prepared by Vacuum Hot Pressing. [J]. Special Casting & Nonferrous Alloys 42(11):1415-1418(2022) DOI： 10.15980/j.tzzz.2022.11.020.

摘要

通过机械合金化+真空热压烧结工艺制备双相Ta-TaCr

合金，研究了不同Ta含量的双相Ta-TaCr

合金在1 350℃下保压180 min后获得的组织和室温力学性能。结果表明，当Ta含量由50%(摩尔分数)增加至85%时，合金的致密度、断裂韧度、抗压强度以及塑性应变均逐渐增加。当Ta含量增加至85%时试样的抗压强度与塑性应变分别为3 753 MPa、28.57%

充分实现了双相增韧的效果。

Abstract

The dual-phase Ta-TaCr

alloy was prepared by mechanical alloying with vacuum hot pressing sintering. The microstructure and room temperature mechanical properties of dual-phase Ta-TaCr

alloys with different Ta contents were investigated with holding at 1 350 ℃ for 180 min. The results indicate that when the Ta content is increased from 50% to 85%（molar fraction）

the density

fracture toughness

compressive strength and plastic strain of the alloy are gradually increased. When the Ta content is increased to 85%

the compressive strength and plastic strain are 3 753 MPa and 28.57%

respectively

fully achieving the dual-phase toughening effect.