Microstructural and mechanical characteristics of laser welding of Ti6Al4V and lead metal

Zhao, Shusen; Yu, Gang; He, Xiuli; Hu, Yijun

doi:10.1016/j.jmatprotec.2012.02.014

Cited by 32 publications

(3 citation statements)

References 17 publications

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“…For friction welding, the low efficiency and welding defects are concerning. Alternatively, highpower-density laser has attracted enormous research interest and found its wide application in a broad branch of manufacturing areas including selective laser sintering and three-dimensional printing [1][2][3][4][5][6], surface nanostructuring [7][8][9][10][11][12], multimaterial joining and integration [13][14][15][16][17], material removal [18,19], and mechanical/optical property enhancements [20][21][22][23]. Characteristics, such as contact-free processing, good flexibility and tunablity, high efficiency, and throughput, make laser a feasible route for welding of 42CrMo [24,25].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere

et al. 2016

Int J Adv Manuf Technol

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Laser keyhole welding of 42CrMo in air and argon atmospheres has been studied both experimentally and numerically. Significant macroscale difference is observed for welding carried out under argon and air shielding. Fusion zone of welding under argon shielding has a "▽" shape, while it has a "U" shape for welding in air. The surface of the weldment is smoother for welding in argon when compared with that in air. Oxygen effect is proposed to account for the experimental results. A three-dimensional heat transfer model with a predefined keyhole is developed to study the heat transport and fluid flow in laser welding process. The variation of weld pool geometry and temperature history is investigated for different oxygen concentrations. It is found that a small amount of oxygen could significantly modify the weld pool dimension, while keeping the temperature history of materials, and thus the microstructure, in the fusion zone and heat-affected zone unchanged.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere

et al. 2016

Int J Adv Manuf Technol

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“…Recently many new metal combinations were successfully joined by laser: Zhao et al (2013) report titanium/lead joining, Tomashchuk et al (2011) carried out titanium to steel welding via copper interlayer, Mathieu et al (2006) and Sierra et al (2007) carried out aluminum to steel welding.…”

Section: Introductionmentioning

confidence: 99%

Direct keyhole laser welding of aluminum alloy AA5754 to titanium alloy Ti6Al4V

Tomashchuk

Sallamand

Cicala

et al. 2015

Journal of Materials Processing Technology

115

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tThe tensile strength of direct AA5754/Ti6Al4V joints performed by high speed Yb:YAG laser welding is found to be determined by morphology and phase content of dissimilar interface formed between contacting Al-rich and Ti-rich melted zones. Three types of contact interfaces were observed: (1) Maximal linear tensile force (220 N/mm for 2 mm thick weld) can be attained when thin contact interface is formed. In this case, the fracture starts in intermetallics-rich zone but propagates mainly in Al-rich melted zone, when in other cases it occurs in brittle intermetallic layers.

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“…High power density lasers have attracted intense research interest in various areas of advanced manufacturing [11][12][13][14][15][16][17][18][19][20][21][22] due to their high efficient, precise, and flexible material-processing features. The transport phenomena during laser-matter interaction is the key for their implementations.…”

Section: Introductionmentioning

confidence: 99%

Capillary convection in pulsed – butt welding of miscible dissimilar couple

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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Pulsed laser butt welding of miscible dissimilar couple has been studied numerically based on a three-dimensional heat and mass transfer model. Driving forces of molten metal flow in the case of stainless steel and nickel are compared using dimensional analysis. Thermo-capillary convection due to surface temperature gradient is recognized as the dominating fluid flow. Temperature coefficients of surface tensions are varied to investigate the influences of the convection on heat and mass transfer phenomena in weld pool. The temperature fields at stainless steel and nickel sides are found to be asymmetric and are greatly affected by different Marangoni convections. Concentration of Ni increases as the temperature coefficient of surface tensions changes from negative to positive. The temperature coefficient of surface tension of stainless steel has greater impact on the weld pool configuration and element concentration than that of nickel. The obtained weld pool configurations are found to be dependent on Prandtl number and convection patterns.

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Microstructural and mechanical characteristics of laser welding of Ti6Al4V and lead metal

Cited by 32 publications

References 17 publications

Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere

Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere

Direct keyhole laser welding of aluminum alloy AA5754 to titanium alloy Ti6Al4V

Capillary convection in pulsed – butt welding of miscible dissimilar couple

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