Diffusion bonding of Ti-45Al-7Nb-0.3W alloy by spark plasma sintering

被引：49
|
作者：
Zhao, Kun [1 ]
Liu, Yong [1 ]
Huang, Lan [1 ]
Liu, Bin [1 ]
He, Yuehui [1 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2016年 / 230卷
基金：
中国国家自然科学基金;
关键词：
TiAl intermetallics; Spark plasma sintering; Diffusion bonding; Mechanical property; Microstructure; MECHANICAL-PROPERTIES; TEMPERATURE; ACTIVATION; PRESSURE;
D O I：
10.1016/j.jmatprotec.2015.11.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Spark plasma sintering (SPS) is a new method for diffusion bonding of TiAl alloys. A powder metallurgical (PM) Ti-45Al-7Nb-0.3W (at%) alloy was bonded using SPS. The effects of bonding temperature, pressure and time on the microstructure and mechanical properties of the alloy were investigated. Complete metallurgical bonding can be produced at temperatures above 1150 degrees C. The tensile strength of specimens depends on the percentage of metallurgical bonding and the interfacial microstructure, and it can exceed the strength of the base material. The fracture mode changes with bonding temperature, transforming from intergranular fracture at the bonding interface to cleavage fracture in the substrate. Due to the activation process of SPS, metallurgical bonding can be achieved at a lower pressure and shorter time than those of the traditional diffusion bonding process. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：272 / 279
页数：8
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