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Effect of Laser Processing Parameters on Surface Texture of Ti6Al4V Alloy
摘要： Surface micro-machining was performed on Ti6Al4V alloy sample by nanosecond laser. The micro-morphology, the depth of texture and the chemical composition of melt deposits were analyzed through different techniques including Ultra-Depth Microscopy, SEM and EDS. The single factor method was applied to investigate the influence of different laser parameters on the depth of texture and micro-morphology. The result showed that the depth of texture increased first and decreased with the increase of average power (11-20.9W), the texture depth decreases sharply when the scanning speed increased from 10mm/s to 40mm/s, and the repetition frequency had little effect on the depth of texture. It was possible to select an optimum combination of laser processing parameters that obtain different depths of texture without decreasing the surface quality of texture.
关键词： laser processing parameters,micro-morphology,Ti6Al4V alloy,depth of texture,surface texture
更新于2025-09-12 10:27:22
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Investigation on Ti6Al4V laser metal deposition using Taguchi based grey approach
摘要： An optimization of laser metal deposition process considering tensile strength, clad hardness, clad grain size and clad porosity as performance characteristics were investigated. The influence of laser power and laser scan speed on the thermal gradient and cooling rate with regard Ti6Al4V powder coating on Ti6Al4V substrate was focused. Taguchi’s experimental design approach is employed for planning the experiments and analyzing the dependency of input variables on desired performance measures such as micro hardness, tensile strength, porosity and grain size. The laser scan speed is found as the dominant factor on the clad hardness while laser power has the influencing effect on grain size of the substrate. GRA is opted for determining the multi performance machining characteristics of laser metal deposition process. The experimental outcomes reveal that the proposed method of multi objective optimization considerably enhances the multi performance machining characteristics.
关键词： Laser metal deposition,Ti6Al4V,Grain size,Thermal gradient,Grey relational approach,Laser scan speed
更新于2025-09-12 10:27:22
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A Parametric Study of Kerf Deviation in Fiber Laser Micro Cutting on Ti6Al4V Superalloy
摘要： A distinctive scope in the fabrication of desired products with specific standard has been achieved by the recent advancement in the technology. This available developing technology is able to produce production of various components, structures, shapes etc made of different kind of materials with necessary dimensional and geometrical features. But it is extremely difficult for 50 Watt average power machine to achieve good quality cutting of the metal sheet upto 2 mm thickness. A unique parameter sawing angle acts as a significant use in kerf deviation in cutting titanium alloy sheet (Ti6Al4V) of 1 mm thickness in low power fiber laser beam machining. The present field of study deals with the effect of sawing angle with other process parameters like cutting speed, power setting, duty cycle, and pulse frequency for a titanium alloy metal sheet to reduce kerf deviation where experiments are carried out on the basis of central composite design (CCD) technique of RSM.
关键词： Kerf deviation,Sawing angle,Titanium alloy Ti6Al4V,RSM
更新于2025-09-11 14:15:04
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A study on microhardness and microstructural evolution of titanium/zirconium diboride cermet coatings with varying scan speeds during laser cladding on Ti6Al4V substrate
摘要： Titanium/zirconium diboride cermet coatings were deposited at different laser scan speeds on Ti–6Al–4V alloy using laser cladding technique. Microhardness of the coatings was compared with the microhardness of the substrate, while the microstructural morphologies of coatings were evaluated via scanning electron microscope with energy dispersive spectroscopy. In addition, resultant grain sizes of the coatings were observed and phases formed within the coatings were also examined. The microhardness of the coatings was seen to be four times harder than the substrate. Scanning electron microscopic images exhibited a refinement in grain size and the development of distinct microstructural features. X-ray diffraction patterns showed significant hard phases such as Al2Zr and Ti3B4 which may be responsible for the sky-rocketed microhardness values of the coatings. This study proffers profound insight on the influence of laser scan speed, during deposition, on the microhardness and microstructural morphology of titanium/zirconium diboride cermet coatings.
关键词： titanium/zirconium diboride cermet coatings,laser cladding technique,Ti6Al4V substrate,laser scan speed
更新于2025-09-11 14:15:04
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Effect of heat input in pulsed Nd:YAG laser welding of titanium alloy (Ti6Al4V) on microstructure and mechanical properties
摘要： In the present investigation, titanium alloy Ti6Al4V of 1.4 mm thickness has been laser-welded in butt joint configuration using pulsed Nd:YAG laser system. The effects of heat input on weld bead shape, fusion zone width (top, middle, and bottom), heat-affected zone (HAZ) width (top, middle, and bottom), and fusion zone area have been studied. The microstructure and mechanical properties of laser-welded specimens at various heat inputs (43.7–103.5 J/mm) have also been investigated. Microstructures of the fusion zone, HAZ, and parent material have been compared at various heat inputs using optical microscope and field emission scanning electron microscope (FESEM). The mechanical properties such as microhardness and tensile strength of the welded joints at varying heat inputs have been studied. Tensile tests of the welded specimen and base metal have been conducted for analyzing ultimate tensile strength and percentage elongation. Surface topography of the tensile fractured specimen of the welded joints and base metal has been examined to analyze the ductile and brittle behavior. EDS analyses of base metal and fusion zone of the welded specimen have been studied. XRD of the as-received base metal and welded specimen have been measured in the range of 30 to 85° to study the crystallographic structure.
关键词： Ti6Al4V,Microstructure,Laser beam welding,Pulsed Nd:YAG laser,Microhardness,Porosity
更新于2025-09-04 15:30:14