Research on hot isostatic pressing sintering behavior of 90W-Ni-Fe-Cu alloy

被引:4
作者
Wang, Jianning [1 ]
Liu, Wensheng [1 ]
Ma, Yunzhu [1 ]
Zhu, Wentan [1 ]
Chen, Baishan [1 ]
Zhang, Lei [1 ]
Bao, Kuokuo [1 ]
Liang, Chaoping [1 ]
Cai, Qingshan [1 ]
机构
[1] Cent South Univ, Natl Key Lab Sci & Technol High strength Struct Ma, Changsha 410083, Peoples R China
来源
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2023年 / 26卷
基金
中国国家自然科学基金;
关键词
Tungsten heavy alloys; Liquid phase sintering; Hot isostatic pressing; Sintering behavior; Microstructure; Mechanical properties; MECHANICAL-PROPERTIES; DISLOCATION DENSITY; SHAPE DISTORTION; PHASE; DENSIFICATION; EVOLUTION;
D O I
10.1016/j.jmrt.2023.09.053
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In order to understand the underlying material evolution during liquid phase sintering (LPS) process in hot isostatic pressing process (HIP), microstructure and mechanical properties of 90 W-Ni-Fe-Cu alloys fabricated at 1400 degrees C/150 MPa are examined sys-tematically. For 90W-4.2Ni-1.8Fe-4Cu alloy, the typical LPS microstructure, which are spherical W grains uniformly surrounded by continuously distributed g- (Ni, Fe, Cu) matrix phase with the lowest W-W contiguity of 0.31, is achieved successfully after HIP at 1400 degrees C/ 150 MPa. The excellent tensile strength reaches as high as 873 MPa with elongation of 17.3% due to the soft g- (Ni, Fe, Cu) matrix phase. Moreover, the relationship between the microstructure parameters VM(1 -CW-W) and elongation epsilon are established and analyze the association with dislocation motion in depth through electron backscattered diffraction (EBSD) characterization. To our best knowledge, the LPS behavior of tungsten alloy is in-situ revealed by high-temperature confocal scanning laser microscopy (HT-CSLM) for the first time. The current research provides a novel strategy for designing and fabricating powder metallurgy materials by LPS with pressure.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
引用
收藏
页码:7284 / 7299
页数:16
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