A comparative study of pulsed Nd:YAG laser welding and TIG welding of thin Ti6Al4V titanium alloy plate

Gao, Xiaolong; Zhang, Linjie; Liu, Jing; Zhang, Jianxun

doi:10.1016/j.msea.2012.06.016

Cited by 211 publications

(99 citation statements)

References 25 publications

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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%

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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Section: α + β Alloy (Ti6al4v)mentioning

confidence: 99%

Welding of titanium alloys

et al. 2017

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“…When welded joints of titanium alloys are conducted using high heat input, a high level of distortion and contamination risk are involved. Temperatures of over 500 • C in welded joints of Ti6Al4V lead to absorption of deleterious gases such as oxygen, nitrogen and hydrogen in the welding seam, leading to lower mechanical strength [6]. Slower cooling due to high heat input in the welding of titanium and its alloys results in grain coarsening and porosity formation in the welding seam [7].…”

Section: Introductionmentioning

confidence: 99%

Robotic Nd:YAG Fiber Laser Welding of Ti-6Al-4V Alloy

Köse

Karaca

2017

Metals

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Abstract:In the present study, Ti6Al4V titanium alloy plates were joined using a robotic fiber laser welding method. The laser welding process was carried out at two different welding speeds. Effects of different heat input conditions on the microstructure and mechanical properties of robotic fiber laser welded joints were investigated. Some grain coarsening was observed in the microstructure of weld metal in samples joined using high heat input, compared to those using low heat input, and volume rates of primary α structures increased in the weld metal. The microstructure of weld metal in samples joined using low heat input was made of basket-weave or acicular α' grains and primary β grains in grain boundaries. Tensile and yield strength of samples joined using low heat input were higher than for those joined using high heat input, but their ductility was lower.

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“…Recently, laser cutting and welding technology has been increasingly used in automobile and its components supplier industries [6][7][8]. Laser beam welding (LBW) is considered as an optimal joining alternative for its high quality, high productivity and low thermal deformation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ar and He on Microstructures and Properties of Laser Welded 800MPa TRIP Steel

et al. 2018

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Abstract. Fiber laser welding of cold rolled TRIP steel (transformation Induced Plasticity steel) sheet with tensile strength of 820MPa and thickness of 1.4mm was carried out using shielding gases Ar and He, respectively. For the same laser power and welding speed, the effects of different shielding gases on penetration and bead section morphologies were investigated. The microstructures and properties of the TRIP steel joints were also studied. The investigation showed that higher penetration and lower porosity could be obtained under shielding gas He using the same laser power and welding speed. The microstructures of the TRIP joint mainly included martensite and retained austenite. But the joint microhardness and tensile strength were higher under the shielding gas He. The tensile strength of the welded joint perpendicular to the weld line was equal to that of the base metal. But the tensile strength of the joint parallel with the weld line was higher than that of the base metal. The plasticity and formability of the welded joint were impaired due to the formation of martensite in the weld metal.

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A comparative study of pulsed Nd:YAG laser welding and TIG welding of thin Ti6Al4V titanium alloy plate

Cited by 211 publications

References 25 publications

Welding of titanium alloys

Welding of titanium alloys

Robotic Nd:YAG Fiber Laser Welding of Ti-6Al-4V Alloy

Effects of Ar and He on Microstructures and Properties of Laser Welded 800MPa TRIP Steel

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