真空热压制备双相Ta-TaCr2合金的组织与性能  

Microstructure and Properties of Dual Phase Ta-TaCr2 Alloy Prepared by Vacuum Hot Pressing

作　　者：孙桂林 肖璇[1] 胡孔生 危诗诗 Sun Guilin;Xiao Xuan;Hu Kongsheng;Wei Shishi(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University)

机构地区：[1]南昌航空大学航空制造工程学院,南昌330063

出　　处：《特种铸造及有色合金》2022年第11期1415-1418,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52161021);南昌航空大学研究生创新专项基金资助项目(YC2021-S676)。

摘　　要：通过机械合金化+真空热压烧结工艺制备双相Ta-TaCr_(2)合金,研究了不同Ta含量的双相Ta-TaCr_(2)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。The dual-phase Ta-TaCr_(2) alloy was prepared by mechanical alloying with vacuum hot pressing sintering. The microstructure and room temperature mechanical properties of dual-phase Ta-TaCr_(2) 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.

关 键 词：TaCr2 机械合金化 双相增韧 室温力学性能 Ta-TaCr合金 

分 类 号：TG146.416[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—金属材料]