Effect of laser shock peening on microstructural, mechanical and corrosion properties of laser beam welded commercially pure titanium

Chattopadhyay, Angshuman; Muvvala, Gopinath; Sarkar, Sagar; Racherla, Vikranth; Nath, Ashish Kumar

doi:10.1016/j.optlastec.2020.106527

Cited by 57 publications

(19 citation statements)

References 34 publications

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“…Consequently, the hardness of the cladding is improved. 10 The hardness at the top of the cladding is about 530HV 0.2 , which is about 32.5% higher than the value Fig. 6 Microhardness of the claddings before and after laser shocking.…”

Section: Cladding Microhardness Analysismentioning

confidence: 83%

“…The results showed that the strain hardening and the formation of twining within the grains improved the fatigue resistance of the welded joint. 10 Chi et al carried out laser shock peening on TA15 deposition layer prepared by direct energy deposition. The results showed that laser shock peening made the average area of α phase in the deposition layer from 1.88 μm 2 reduced to 0.73 μm 2 , which improved the microhardness of the samples.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and properties of Ti-6Al-4V alloy coating prepared by laser composite process

Ren

Ren³

et al. 2023

Opt. Eng.

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.A composite process of laser cladding and laser shocking is proposed to prepare the Ti-6Al-4V alloy coating. The structure before laser shocking is flake β phase and acicular martensite α ′ phase precipitated at the grain boundary of the flake β phase. The staggered distribution of acicular martensite α ′ forms a basket structure. After laser shocking, the flake β phase is refined, and the basket structure orientation becomes more complex. In addition, the structure is more uniform and denser. The laser shocking influence depth is about 1.7 mm, the microhardness is increased to 470 to 530 HV0.2, the friction coefficient is decreased to 0.35, the wear amount is decreased by 26%, and the wear form changes from the comprehensive role of abrasive and adhesive wear to abrasive wear.

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Section: Cladding Microhardness Analysismentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Microstructure and properties of Ti-6Al-4V alloy coating prepared by laser composite process

Ren

Ren³

et al. 2023

Opt. Eng.

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“…Recently, LSP techniques have been widely applied as a method for post-processing of welds [ 105 ] and on additively manufactured (AM) components [ 106 ]. LSP techniques successfully imparted significant enhancement in surface mechanical properties of weld joints of Laser beam welding (LBW) [ 107 , 108 , 109 , 110 ], Tungsten inert gas welding (TIG) [ 111 , 112 , 113 ], and Friction stir welding (FSW) [ 114 ] because of the superiority of LSP compared to other methods of peening. The inherent advantage of LSP compared to SP and UIP are the introduction of compressive stress to in-depth, the magnitude of compressive stress, better surface finish, less damage to the initial surface, accuracy, and flexibility [ 18 , 104 ].…”

Section: Peening Techniquesmentioning

confidence: 99%

Peening Techniques for Surface Modification: Processes, Properties, and Applications

et al. 2021

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Surface modification methods have been applied to metals and alloys to change the surface integrity, obtain superior mechanical properties, and improve service life irrespective of the field of application. In this review paper, current state-of-the-art of peening techniques are demonstrated. More specifically, classical and advanced shot peening (SP), ultrasonic impact peening (UIP), and laser shock peening (LSP) have been discussed. The effect of these techniques on mechanical properties, such as hardness, wear resistance, fatigue life, surface roughness, and corrosion resistance of various metals and alloys, are discussed. This study also reports the comparisons, advantages, challenges, and potential applications of these processes.

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“…It has the advantages of zero temperature rise and ultra-deep residual compressive stress strengthening layer, which can significantly improve the mechanical properties of materials. Angshuman Chattopadhyay et al [8] studied the influence of laser impact strengthening on commercial pure titanium laser welding parts, and found that laser shock peening produced a lot of compressive residual stress, strain hardening and microstructure changes through plastic deformation, such as the formation of entangling resulting in significantly improved tensile and fatigue properties of commercial pure titanium laser welds. Xu Haiying et al [9] used laser shock peening (LSP) process to conduct post-welding treatment on TC4 titanium alloy TIG welds, and found that the surface microhardness, tensile properties and fatigue life of the welded joints after laser treatment were improved to varying degrees.…”

Section: Introductionmentioning

confidence: 99%

Effect of laser shock peening process on the tensile properties of TC4 titanium alloy welds

Quan

Liu

Ouyang

et al. 2022

Seventeenth National Conference on Laser Technology and Optoelectronics

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TC4 (Ti-6Al-4V) is a comprehensive metal material with excellent ductility, low density, high specific strength, and a series of advantages such as excellent toughness and weldability, so it is widely used in the aerospace industry. Due to defects such as porosity in the welding process and exposure to alternating loads, welded components of titanium alloys in the aerospace industry become the most vulnerable parts and are extremely susceptible to failure and fracture. In this paper, a single-sided sequential laser impact strengthening process is used to treating the laser welds of TC4 titanium alloy cold rolled parts to investigating the tensile properties of the laser welded welds before and after the process. By observing the tensile fracture by SEM, measuring the microhardness by Vickers hardness tester, and measuring the physical phase by XRD diffractometer, the results of these data were combined to analyze the strengthening mechanism of this laser shock peening process on the laser welds of TC4 titanium alloy. The experimental results show that after the surface strengthening process, the tensile strength and surface hardness of TC4 laser welds are improved compared with those before 1 the treatment. The analysis shows that the high residual compressive stress layer and grain refinement caused by laser shock peening are the reasons for the improvement of mechanical properties of materials.

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Effect of laser shock peening on microstructural, mechanical and corrosion properties of laser beam welded commercially pure titanium

Cited by 57 publications

References 34 publications

Microstructure and properties of Ti-6Al-4V alloy coating prepared by laser composite process

Microstructure and properties of Ti-6Al-4V alloy coating prepared by laser composite process

Peening Techniques for Surface Modification: Processes, Properties, and Applications

Effect of laser shock peening process on the tensile properties of TC4 titanium alloy welds

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