Study on Laser Welding Technology and Properties of Ti75 Titanium Alloy

For Ti75 titanium alloy with a thickness of 3mm, 10kW continuous fiber laser was used to conduct lap test on the material. By adjusting the reserved gap between two plates, laser power, welding speed and defocusing amount, the macroscopic morphology and microstructure characteristics of the welded j...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1622; no. 1; pp. 12046 - 12056
Main Authors Cao, Shouqi, He, Xin, Liu, Wanrong, Feng, Jiecai
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.09.2020
Subjects
Continuous fibers
Defocusing
Fiber lasers
Laser beam welding
Lasers
Microhardness
Morphology
Oxidation
Physics
Process parameters
Tensile properties
Tensile strength
Titanium alloys
Titanium base alloys
Welded joints
Welding parameters
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Summary:For Ti75 titanium alloy with a thickness of 3mm, 10kW continuous fiber laser was used to conduct lap test on the material. By adjusting the reserved gap between two plates, laser power, welding speed and defocusing amount, the macroscopic morphology and microstructure characteristics of the welded joint were analyzed, and the tensile properties and micro-hardness of the welded joint were tested. The results show that, under the appropriate process parameters, the weld of the specimens is beautiful and the degree of oxidation is low, the tensile strength of the welded joint can reach the level of the base material, and the hardness value is higher than the base material. By adjusting laser welding parameters such as laser power, welding speed and defocusing amount, welding joint quality can be effectively controlled.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1622/1/012046