Microstructure and mechanical properties of TiC/Ti matrix composites and Ti-48Al-2Cr-2Nb alloy joints brazed with Ti-28Ni eutectic filler alloy

被引：10
作者：
Dong, Duo [1 ,2 ]
Xu, Haitao [3 ]
Zhu, Dongdong [2 ]
Wang, Gang [2 ]
He, Qing [1 ]
Lin, Junpin [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 410083, Peoples R China
[2] Quzhou Univ, Key Lab Air Driven Equipment Technol Zhejiang Pro, Quzhou 324000, Peoples R China
[3] Anhui Polytech Univ, Sch Mech & Automot Engn, Wuhu 241000, Peoples R China
来源：
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING | 2019年 / 19卷 / 04期
基金：
中国国家自然科学基金;
关键词：
TMCs; TiAl alloy; Brazing; Microstructure; Shear strength; ZR-CU-NI; TIAL ALLOY; AMORPHOUS ALLOY; TEMPERATURE; EVOLUTION; PHASE; WELDS; NB;
D O I：
10.1016/j.acme.2019.07.005
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Ti-48Al-2Cr-2Nb and TiC/Ti matrix composites were successfully joined using Ti-28Ni eutectic filler metal at different brazing temperatures. Microstructure and mechanical properties of the joints were systematically studied. The results showed that the joints all showed integral interfaces and the microstructures of the joints for 980 degrees C/15 min were detected as Ti-48Al-2Cr-2Nb/alpha(2)-Ti3Al + tau(3)-Al3NiTi2/alpha(2)-Ti3Al/Ti(s,s) + delta-Ti2Ni + TiC/Ti matrix composites. As brazing temperature increased, continuous Ti2Ni layer diminish and Ti2Ni phase became more discrete. However, alpha(2)-Ti3Al rich layer has thickened which deteriorates the properties of the joints. The highest shear strength achieved 469.5 MPa as the joint brazed at 1010 degrees C for 15 min. The evolution of microstructures brazed with different temperatures was studied and its relationship with the shear strength was also revealed in details. (C) 2019 Published by Elsevier B.V. on behalf of Politechnika Wroclawska.
引用
收藏
页码：1259 / 1267
页数：9
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