Laser welding of light metal alloys: aluminium and titanium alloys

Sánchez-Amaya, J.M.; Amaya-Vázquez, M. R.; Botana, Francisco

doi:10.1533/9780857098771.2.215

Cited by 26 publications

(11 citation statements)

References 99 publications

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“…Figure 4 shows the microstructure of the base metal (Ti 6 Al 4 V-BM). It presents a microstructure characterized by two phases: equiaxed α grains with intergranular β particles, in good agreement with previous studies [18,21]. The microstructure of Ti6Al4V samples remelted by laser treatment (Ti 6 Al 4 V-LR) is quite different than that of Ti 6 Al 4 V-BM, as depicted in Figure 5.…”

Section: Samples Of Tisupporting

confidence: 90%

“…Several modifications have been reported in the literature on the improvement of titanium surface properties [5,[15][16][17][18] by different methods, including laser-assisted methods [10,19,20]. In fact, laser technology can be employed in several industrial processes, comprising welding similar [18] and dissimilar alloys [19], or the modification of surface properties for corrosion resistance improvements [20].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, laser technology can be employed in several industrial processes, comprising welding similar [18] and dissimilar alloys [19], or the modification of surface properties for corrosion resistance improvements [20]. Laser remelting (LR) of Ti 6 Al 4 V with appropriate fluence provokes microstructural changes leading to an increase in microhardness without jeopardizing the corrosion resistance [21].…”

Section: Introductionmentioning

confidence: 99%

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Tribocorrosion Study of Ordinary and Laser-Melted Ti6Al4V Alloy

Silva

Churiaque

Bastos

et al. 2016

Metals

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Titanium alloys are used in biomedical implants, as well as in other applications, due to the excellent combination of corrosion resistance and mechanical properties. However, the tribocorrosion resistance of titanium alloy is normally not satisfactory. Therefore, surface modification is a way to improve this specific performance. In the present paper, laser surface-modified samples were tested in corrosion and pin-on-disk tribocorrosion testing in 0.90% NaCl under an average Hertzian pressure of 410 MPa against an alumina sphere. Laser-modified samples of Ti 6 Al 4 V were compared with ordinary Ti 6 Al 4 V alloy. Electrochemical impedance showed higher modulus for laser-treated samples than for ordinary Ti 6 Al 4 V ones. Moreover, atomic force microscopy revealed that laser-treated surfaces presented less wear than ordinary alloy for the initial exposure. For a further exposure to wear, i.e., when the wear depth is beyond the initial laser-affected layer, both materials showed similar corrosion behavior. Microstructure analysis and finite element method simulations revealed that the different behavior between the initial and the extensive rubbing was related to a fine martensite-rich external layer developed on the irradiated surface of the fusion zone.

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Section: Samples Of Tisupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tribocorrosion Study of Ordinary and Laser-Melted Ti6Al4V Alloy

Silva

Churiaque

Bastos

et al. 2016

Metals

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“…The tensile tested samples fractured transgranularly with fine dimples on the fracture surface. Most recently, LBW of Ti64 were performed under conduction regime [18] and under keyhole regime [19], where both modes leading to butt welds with similar tensile properties than the unwelded base metal. In fact, these welded samples broke at the BM, confirming that the HAZ and FZ are stronger than the BM in the welded samples [18].…”

Section: α + β Alloy (Ti6al4v)mentioning

confidence: 99%

“…Most recently, LBW of Ti64 were performed under conduction regime [18] and under keyhole regime [19], where both modes leading to butt welds with similar tensile properties than the unwelded base metal. In fact, these welded samples broke at the BM, confirming that the HAZ and FZ are stronger than the BM in the welded samples [18]. A study by Mitchell et al [7] on welding of Ti64 by electron beam welding (EBW) suggested a slight increase in strength in the weld zone (HAZ and FZ).…”

Section: α + β Alloy (Ti6al4v)mentioning

confidence: 99%

Welding of titanium alloys

et al. 2017

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Abstract. This article briefly summarises previous reports as well as some recent results on welding of various titanium alloys. Titanium is available in a wide range, hence, their properties and characteristics (including welding characteristics) may also varied significantly. The alloys studied represented three major areas; they are (1): unalloyed or commercially pure titanium (CP Ti), (2): near α and α+β alloys, and (3): β alloys. From our preliminary results, it can be reported that the structure of fusion zone (FZ) and heat affected zone (HAZ) of alloys from area (1) may change but their hardness remained, arguably, the same as the as-received material. Alloys from area (2) showed an increase in hardness in the FZ and HAZ areas due to the formation of α-prime or martensite, while alloys from area (3) experienced a reduction in hardness associated with dissolution of α phase leaving only retained β in the FZ. Further investigations are required to confirm these findings. Such information are very useful so that appropriate post welding heat treatment (PWHT) can be applied to improve their properties and performance.

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