Effect of mechanical milling on Ni-TiH2 powder alloy filler metal for brazing TiAl intermetallic alloy: The microstructure and joint's properties

被引：21

作者：

He, Peng ^{[1
]}

Liu, Duo ^{[1
]}

Shang, Ering ^{[1
]}

Wang, Ming ^{[1
]}

机构：

[1] Harbin Inst Technol, Natl Key Lab Adv Welding Prod Technol, Harbin 150001, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2009年 / 60卷 / 01期

基金：

中国国家自然科学基金;

关键词：

TiAl intermetallic; Brazing; Microstructure; Mechanical milling; TiH2-Ni powder alloy; PHASE; SYSTEM; SHEET;

D O I：

10.1016/j.matchar.2008.05.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A TiH2-50 wt.% Ni powder alloy was mechanically milled in an argon gas atmosphere using milling times up to 480 min. A TiAl intermetallic alloy was joined by vacuum furnace brazing using the TiH2-50 wt.% Ni powder alloy as the filler metal. The effect of mechanical milling on the microstructure and shear strength of the brazed joints was investigated. The results showed that the grains of TiH2-50 wt.% Ni powder alloy were refined and the fusion temperature decreased after milling. A sound brazing seam was obtained when the sample was brazed at 1140 degrees C for 15 min using filler metal powder milled for 120 min. The inter-facial zones of the specimens brazed with the milled filler powder were thinner and the shear strength of the joint was increased compared to specimens brazed with non-milled filler powder. A sample brazed at 1180 degrees C for 15 min using TiH2-50 wt.% Ni powder alloy milled for 120 min exhibited the highest shear strength at both room and elevated temperatures. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：30 / 35

页数：6

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