Effect of the Process Parameters on the Geometrical Defects of Ti-6Al-4V Hot Rolled Sheets Laser Beam Welded

Ti-6Al-4V is an alloy that is increasingly used in aeronautics due to its high mechanical properties coupled with the lightness. An effective technology used to manufacture titanium components with a reduced buy to fly ratio is the laser beam welding. Previous studies showed that the key factor that rules the mechanical properties and the fatigue life of the joint is its morphology. The aim of this paper was to investigate the influence of the main process parameters, such as welding speed and laser power, on the geometrical features of the joint, in terms of undercut, underfill, reinforcement and so on. 3.0 mm thick Ti-6Al-4V rolled sheets were welded in butt joint configuration by using a Nd-YAG laser source. The joint performances were studied in terms of weld morphology, microstructure and Vickers microhardness. Then, defects such as underfill and reinforcement, controlling the whole weld morphology, were observed, and the relationship between the occurrence, the entity of these defects and the process parameters was studied.

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Effect of Laser Welding Process Parameters on Microstructure and Mechanical Properties on Butt Joint of New Hot-Rolled Nano-scale Precipitation-Strengthened Steel

Acta Metallurgica Sinica (English Letters) ◽

10.1007/s40195-014-0081-z ◽

2014 ◽

Vol 27 (3) ◽

pp. 521-529 ◽

Cited By ~ 24

Author(s):

Min Zhang ◽

Xiaonan Wang ◽

Guangjiang Zhu ◽

Changjun Chen ◽

Jixin Hou ◽

...

Keyword(s):

Mechanical Properties ◽

Laser Welding ◽

Process Parameters ◽

Welding Process ◽

Butt Joint ◽

Nano Scale ◽

Microstructure And Mechanical Properties ◽

Hot Rolled ◽

Laser Welding Process

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Identification of Optimum Laser Beam Welding Process Parameters for E110 Zirconium Alloy Butt Joint Based on Taguchi-CFD Simulations

Lasers in Manufacturing and Materials Processing ◽

10.1007/s40516-018-0061-7 ◽

2018 ◽

Vol 5 (2) ◽

pp. 182-199 ◽

Cited By ~ 5

Author(s):

G. Satyanarayana ◽

K. L. Narayana ◽

B. Nageswara Rao

Keyword(s):

Laser Beam ◽

Process Parameters ◽

Zirconium Alloy ◽

Laser Beam Welding ◽

Welding Process ◽

Butt Joint ◽

Cfd Simulations

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Fiber Laser Beam Welding of Ti-6242 - Effect of Processing Parameters on Microstructural and Mechanical Properties

Materials Science Forum ◽

10.4028/www.scientific.net/msf.879.903 ◽

2016 ◽

Vol 879 ◽

pp. 903-908 ◽

Cited By ~ 2

Author(s):

Nikolai Kashaev ◽

Dmitry Pugachev ◽

Stefan Riekehr ◽

Volker Ventzke

Keyword(s):

Mechanical Properties ◽

Laser Beam ◽

Fiber Laser ◽

Laser Beam Welding ◽

Base Material ◽

Butt Joint ◽

Beam Power ◽

Focus Position ◽

Laser Beam Power ◽

Advance Speed

The present work investigates the effects of laser beam power, focus position and advance speed on the geometry, microstructure and mechanical properties of fiber laser beam welded Ti-6Al-2Sn-4Zr-2Mo (denoted as Ti-6242) butt joints used for high temperature applications. Detailed microstructural and mechanical studies were performed on welds produced using optimized parameters (a laser beam power of 5 kW, a focus position of 0.0 mm and an advance speed of 6.2 m/min). The Ti-6242 base material is characterized by a globular (α+β) microstructure. The heat input during laser beam welding led to the formation of a martensitic α’-phase fusion zone. The heat affected zone consisted of globular grains and acicular crystallites. These local transformations were connected with a change in the micro-texture, average grain size and β-phase content. Furthermore, the microhardness increased from 330 HV 0.3 to 450 HV 0.3 due to the martensitic transformation. The mechanical behavior of the laser beam welded Ti-6242 butt joint loaded in tension was determined by the properties of the Ti-6242 base material. The local increase in hardness provided a shielding effect that protected the Ti-6242 butt joint against mechanical damage.

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Experimental Investigation on Mechanical and Distortion Characteristics of Titanium/Aluminium Dissimilar Metal Joint Using Laser Beam Welding

Journal of Advanced Manufacturing Systems ◽

10.1142/s0219686718500324 ◽

2018 ◽

Vol 17 (04) ◽

pp. 569-579

Author(s):

K. Kalaiselvan ◽

A. Elango ◽

N. M. Nagarajan ◽

K. Sekar

Keyword(s):

Laser Beam ◽

Laser Beam Welding ◽

Butt Joint ◽

Laser Source ◽

Al Alloy ◽

Test Results ◽

Base Metals ◽

Dissimilar Metal ◽

Metal Joint ◽

Titanium Aluminium

Laser beam welding (LBW) is based on interaction between the laser source and base metals. Different methods have been developed recently to produce weld joints of light metals. This produces good weld bead to simplify the structure and reduce the weight and cost to meet the important concerns of aerospace industry. To achieve these, Ti (Ti6Al4V) and Al (AA2024) dissimilar alloy sheets are welded with butt joint configuration using Nd: YAG pulsed laser welding unit. The weldment is subjected to tests to evaluate mechanical and distortion characteristics. From the test results, it is found that LBW is very much suitable for joining Titanium/Aluminium (Ti/Al) alloy sheets.

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