Microstructure and Properties of Brazed W-W Joints by Ti-35Ni Alloy

被引：1

作者：

Song, Xiaoguo ^{[1
,2
]}

Li, Jiaxun ^{[1
]}

Fu, Wei ^{[1
]}

Li, Yun ^{[3
]}

Niu, Hongwei ^{[2
]}

Long, Weimin ^{[4
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

[2] Shandong Inst Shipbldg Technol, Weihai 264209, Peoples R China

[3] Xian Space Engine Co Ltd, Xian 710000, Peoples R China

[4] Zhengzhou Res Inst Mech Engn Co Ltd, State Key Lab New Brazing Mat & Technol, Zhengzhou 450001, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2022年 / 31卷 / 08期

基金：

中国国家自然科学基金;

关键词：

interface microstructure; mechanical properties; tungsten; Ti-35Ni alloy; vacuum brazing; HELIUM-COOLED DIVERTOR; INTERFACIAL MICROSTRUCTURE; MECHANICAL-PROPERTIES; TZM ALLOY; TUNGSTEN; DIFFUSION; COMPOSITE; TITANIUM;

D O I：

10.1007/s11665-022-06729-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, pure W was successfully brazed to itself using self-prepared Ti-35Ni filler alloy. The scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and x-ray diffractometry (XRD) were utilized to characterized the interfacial microstructure. The results showed that the typical interfacial microstructure of W-W joint was: W substrate/W containing Ti-Ni intermetallics/TiNi+Ti2Ni+Ti(s,s)+W particles/W containing Ti-Ni intermetallics/W substrate. The brazing temperature presented a pronounced influence on the interfacial microstructure and mechanical properties of W-W joints. With increasing brazing temperature, the thickness of brazing seam was gradually reduced while the diffusion zone became widened. The disappearance of the defects was also observed. The shear strength of W-W joints tested at room temperature and at 800 degrees C was up to 74.87 and 214.08 MPa, respectively. The fracture surface presented a mixed characteristic of cleavage and trans-granular fracture.

引用

页码：6827 / 6834

页数：8

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