Effect of tantalum addition method on microstructure and mechanical properties of the 90(W-20Ta)-Ni-Fe alloy

被引：13

作者：

Zhang, Yong ^{[1
]}

Huang, Yufeng ^{[1
]}

Liu, Wensheng ^{[1
]}

Ma, Yunzhu ^{[1
]}

Wang, Yao ^{[1
]}

Liang, Chaoping ^{[1
]}

机构：

[1] Cent South Univ, Natl Key Lab Sci & Technol High Strength Struct M, Changsha 410083, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2022年 / 105卷

基金：

中国国家自然科学基金;

关键词：

Mechanical milling; Tungsten alloy; Sintering; Microstructure; Mechanical properties; FE HEAVY ALLOYS; FRACTURE-BEHAVIOR; TUNGSTEN ALLOYS; REFINEMENT; SIZE;

D O I：

10.1016/j.ijrmhm.2022.105848

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The method of adding the initial elements greatly affects the structure and mechanical properties of a tungsten alloy. In this study, the 90(W-20Ta)-Ni-Fe alloy was prepared by the direct addition of elements and W-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-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-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%.

引用

页数：11

共 29 条

[1] MICROSTRUCTURAL REFINEMENT OF W-NI-FE HEAVY ALLOYS BY ALLOYING ADDITIONS [J].

BOSE, A ;

GERMAN, RM .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1988, 19 (12) :3100-3103

[2] Microstructure and mechanical properties of additive manufactured W-Ni-Fe-Co composite produced by selective laser melting [J].

Chen, Hui ;

Zi, Xuhui ;

Han, Yong ;

Dong, Jing ;

Liu, Shichao ;

Chen, Chao .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2020, 86

[3] FRACTURE-BEHAVIOR OF W-NI-FE HEAVY ALLOYS [J].

CHURN, KS ;

GERMAN, RM .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1984, 15 (02) :331-338

[4] Assessment of tungsten for use in the ITER plasma facing components [J].

Davis, JW ;

Barabash, VR ;

Makhankov, A ;

Plochl, L ;

Slattery, KT .

JOURNAL OF NUCLEAR MATERIALS, 1998, 258 :308-312

[5]

de Oro Calderon R., 2022, Encyclopedia Mater., Met. Alloys, V3, P481, DOI [10.1016/b978-0-12-819726-4.00127-7, DOI 10.1016/B978-0-12-819726-4.00127-7]

[6]

El-Eskandarany M.S., 2015, MECH ALLOY NANOTECHN, P84

[7]

Fan JL, 2000, T NONFERR METAL SOC, V10, P57

[8] Review: liquid phase sintering [J].