Microstructure Characteristics of Transient Liquid Phase Diffusion Bonding Super-Ni/NiCr Laminated Composite to TC4 Alloy

被引：0
作者：
Xu Xiaohan [1 ]
Li Yajiang [1 ]
Liu Kun [1 ,2 ]
Wang Juan [1 ]
机构：
[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
[2] Univ Wisconsin, Dept Mat Sci & Engn, 1509 Univ Ave, Madison, WI 53706 USA
来源：
SCIENCE OF ADVANCED MATERIALS | 2019年 / 11卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Super-Ni/NiCr Laminated Composite; TC4; Alloy; TLP Diffusion Bonding; Microstructure; Shear Strength; TI-6AL-4V ALLOY; EVOLUTION; NI; STEEL; NB;
D O I：
10.1166/sam.2019.3585
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Transient liquid phase (TLP) diffusion bonding super-Ni/NiCr laminated composite to TC4 alloy was carried out using the interlayer of Cu foil and Ti powder at 950 degrees C with the pressure of 5 MPa, microstructure, shear strength and element distribution of joints were studied. Results showed that joint was mainly divided into 2 diffusion layers and 1 middle reaction layer, the width of each layer was increased with the bonding time prolonging. The main elements of joint nearby Ni80Cr20 base layer side were Ti and Cu, the existence of high-hardness intermetallic compounds in diffusion transition zone can easily lead to micro-cracks. The fracture of joint nearby super-Ni cover layer side occurred at the interface of cover layer and TC4 alloy, and the fracture of joint nearby Ni80Cr20 base layer side occurred along the interface of transient liquid phase diffusion bonding. The maximum shear strength of joint nearby super-Ni side and Ni80Cr20 side was 62 MPa and 42 MPa obtained at 950 :C when the bonding time is 90 min. The configuration of Ni80Cr20/Cu + Ti/TC4 was brittle fracture with characteristics of plastic fracture.
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收藏
页码：1252 / 1258
页数：7
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