Laser Beam Welding of a Ti-15Mo/TiB Metal-Matrix Composite

被引：13

作者：

Ozerov, Maxim ^{[1
]}

Povolyaeva, Elizaveta ^{[1
]}

Stepanov, Nikita ^{[1
]}

Ventzke, Volker ^{[2
]}

Dinse, Rene ^{[2
]}

Kashaev, Nikolai ^{[2
]}

Zherebtsov, Sergey ^{[1
]}

机构：

[1] Belgorod State Univ, Lab Bulk Nanostruct Mat, Belgorod 308015, Russia

[2] Helmholtz Zentrum Geesthacht, Dept Laser Proc & Struct Assessment, Inst Mat Mech, Max Planck Str 1, D-21502 Geesthacht, Germany

来源：

METALS | 2021年 / 11卷 / 03期

基金：

俄罗斯科学基金会;

关键词：

titanium-matrix composite; laser beam welding; microstructure; pre-heating temperature; TiB bunches; aspect ratio; microhardness; BETA-TITANIUM ALLOYS; TI-TIB COMPOSITES; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; TENSILE PROPERTIES; BEHAVIOR; WHISKERS; PHASE;

D O I：

10.3390/met11030506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A Ti-15Mo/TiB metal-matrix composite was produced by spark plasma sintering at 1400 degrees C. The fractions of the elements in the initial powder mixture were 80.75 wt.% Ti, 14.25 wt.% Mo, and 5 wt.% TiB2. The initial structure of the synthesized composite was composed of bcc beta titanium matrix and needle-like TiB reinforcements with an average thickness of 500 +/- 300 nm. Microstructure and mechanical properties of the composite were studied after laser beam welding (LBW) was carried out at room temperature or various pre-heating temperatures: 200, 400, or 600 degrees C. The quality of laser beam welded joints was not found to be dependent noticeably on the pre-heating temperature; all welds consisted of pores the size of which reached 200-300 mu m. In contrast to acicular individual particles in the base material, TiB whiskers in the weld zone were found to have a form of bunches. The maximum microhardness in the weld zone (similar to 700 HV) was obtained after welding at room temperature or at 200 degrees C; this value was similar to 200 HV higher than that in the base material.

引用

页码：1 / 12

页数：11

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