Influence of welding processes on microstructure, tensile and impact properties of Ti-6Al-4V alloy joints

Balasubramanian, T.; Balakrishnan, M.; Balasubramanian, V.; Manickam, M. A. Muthu

doi:10.1016/s1003-6326(11)60850-9

Cited by 92 publications

(39 citation statements)

References 15 publications

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“…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]. Grain coarsening and porosities cause lower mechanical strength, especially in welded joints.…”

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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Section: Introductionmentioning

confidence: 99%

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

Köse

Karaca

2017

Metals

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“…Balasubramanian et al (2011) reported that severe embrittlement in the weld is caused by the base metal reacting with atmosphere gases such as oxygen, nitrogen, carbon or hydrogen. The major welding methods are gas metal arc welding (GMAW), electron beam welding and gas tungsten arc welding (GTAW).…”

Section: Introductionmentioning

confidence: 99%

Analysis of microstructure and mechanical properties change in laser welding of Ti6Al4V with a multiphysics prediction model

Hong

Shin

2016

Journal of Materials Processing Technology

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“…It is reported that tungsten inert gas (TIG) welding of Ti-6Al-4V alloy plates resulted in the highest impact strength as compared to laser and electron beam welding [6]. Gao et al [7] found that for welding thin sheets of titanium alloys, TIG welding led to higher residual distortions and a coarse microstructure.…”

Section: Introductionmentioning

confidence: 99%

Laser Welding of BTi-6431S High Temperature Titanium Alloy

Zeng

Oliveira

et al. 2017

Metals

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Abstract:A new type of high temperature titanium alloy, BTi-6431S, has recently become the focus of attention as a potential material for aircraft engine applications, which could be used up to 700 • C. Pulsed laser welding was used to butt join the BTi-6431S titanium alloy in order to understand the feasibility of using fusion-based welding techniques on this material. The effect of laser energy on the microstructure and mechanical properties of the joints was investigated. The microstructural features of the joints were characterized by means of microscopy and X-ray diffraction. Tensile testing was conducted at both room temperature and high temperature to simulate potential service conditions. The results show that the microstructure of the laser welded joints consists of primary α phase and needle α' phase, while the microstructure of the heat affected zone consists of α, β, and needle α' phases. The tensile strength of the welded joints at room temperature was similar to that of the base material, despite a reduction in the maximum elongation was observed. This was related to the unfavorable microstructure in the welded joints. Nonetheless, based on these results, it is suggested that laser welding is a promising joining technique for the new BTi-6431S titanium alloy for aerospace applications.

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Influence of welding processes on microstructure, tensile and impact properties of Ti-6Al-4V alloy joints

Cited by 92 publications

References 15 publications

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

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

Analysis of microstructure and mechanical properties change in laser welding of Ti6Al4V with a multiphysics prediction model

Laser Welding of BTi-6431S High Temperature Titanium Alloy

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