Experimental and numerical investigation of temperature distribution and analysis of mechanical properties during pulsed Nd-YAG laser welding of thin Ti6Al4V alloy

Nd: YAG laser welding is an important joining technique for titanium alloys in aerospace industries, aircraft industries, biomedical instrument and various other fusion welding industries. Titanium alloy (Ti-6Al-4V) is used during the research, because it has high strength and oxidation resistance i...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2018-06, Vol.377 (1), p.12158
Main Authors: Kumar, Uday, Patel, Deepankar, Zaffar, Zishan, Gope, D K, Chattopadhyaya, Somnath, Das, A K, Biswal, M K
Format: Article
Language:English
Subjects:
Aerospace industry
Aircraft
Conduction heating
Conductive heat transfer
Emission analysis
Field emission microscopy
Fusion welding
Gas turbines
Heat affected zone
Laser beam welding
Lasers
Linings
Mechanical properties
Medical research
Metallurgy
Morphology
Neodymium lasers
Numerical analysis
Optical microscopy
Optical properties
Oxidation resistance
Process parameters
Semiconductor lasers
Surgical implants
Temperature
Temperature distribution
Titanium alloys
Titanium base alloys
YAG lasers
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Summary:Nd: YAG laser welding is an important joining technique for titanium alloys in aerospace industries, aircraft industries, biomedical instrument and various other fusion welding industries. Titanium alloy (Ti-6Al-4V) is used during the research, because it has high strength and oxidation resistance in a wide range of temperatures. It is used in combustion cans, and transition liners in both aircraft and land-based gas turbines and medical engineering. In the present research work, an experimental and numerical analysis of Nd-YAG laser welded titanium alloy thin sheet for temperature distribution has been done. A three dimensional heat conduction equation has been used for the numerical simulation. The influence of different welding conditions like welding speed, welding power on the heat affected zone (HAZ) morphology, metallurgy and mechanical properties was discussed in detail. Microstructures were assessed by optical microscopy and by field emission scanning electron microscope (FE-SEM), while the mechanical behavior was analyzed in terms of Vickers micro-hardness is compared with different welding conditions. The temperature field of the welding process for the different parameters were studied. It was found that the simulated results are in good agreement with the experimental result.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/377/1/012158