Investigation of microstructure and mechanical properties of titanium alloy sheet using low power Nd-YAG laser welding process

Kumar, Ujwal; Gope, Deepak Kumar; Kumar, R.; Chattopadhyaya, Somnath; Das, Anil Kumar; Pramanik, Alokesh; Królczyk, Grzegorz M.

doi:10.4149/km_2018_2_121

Cited by 13 publications

(6 citation statements)

References 19 publications

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“…Both plate 1 and plate 2 had the α and β phases together. This result is similar to those of reported by [2] and [6]. The appearance of the α+β phases is almost globular, which establishes that the welded joint is ductile.…”

Section: Discussionsupporting

confidence: 91%

“…The previous studies revealed that α and β are the two phases present in the Ti-alloys. The α-phase is usually characterized as a soft phase whereas the β phase is known to possess high hardness [2,6]. The different types of alloying elements in titanium are classified on the basis of their effects on α-β transformation temperature.…”

Section: Testing and Results Analysismentioning

confidence: 99%

“…Ti-6Al-4V is the commercially available and is the most widely used α+β titanium alloy. It is also called grade-5 alloy [6]. It imparts a beneficial combination of yield strength, wear resistance, weldability and hardness [7].…”

Section: Introductionmentioning

confidence: 99%

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Preliminary Investigations of Structure and Properties of TIG Welded Ti-6Al-4V Alloy

Dewangan¹,

Ranjan²,

Chattopadhyaya³

et al. 2021

Adv. Sci. Technol. Res. J.

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The titanium (Ti) and its alloys are taken into interest for commercial purpose due to its low density, high yield strength and high corrosion resistance properties. The present work deals with microstructural observation and mechanical property analysis of tungsten inert gas (TIG) welded Ti-6Al-4V alloy joints. For the purpose, two different set of plates were welded at same current and voltage, i.e., 190 A and 24 V, by the TIG welding technique. A critical analysis of the microstructure and mechanical properties like tensile strength and hardness of the welded Ti-6Al-4V plates was carried out in this work. It was found that both plates showed different behavior during the tension test. Plate 1 had 464.54 MPa of tensile stress and it broke at the welded joint. Plate 2 was unaffected at the welded zone but was broken at the base metal zone. The second plate had tensile strength of 501.83 MPa. According to the hardness test, both the welded plates possessed the highest hardness at the welded zone. However, plate 2 showed approximately 10% higher hardness than that of plate 2. A proper interrelationship was observed between the mechanical behavior and microstructural appearance. The microscopic view of the welded joints revealed the presence of α, β and martensitic-α phases.

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Section: Discussionsupporting

confidence: 91%

Section: Testing and Results Analysismentioning

confidence: 99%

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Preliminary Investigations of Structure and Properties of TIG Welded Ti-6Al-4V Alloy

Dewangan¹,

Ranjan²,

Chattopadhyaya³

et al. 2021

Adv. Sci. Technol. Res. J.

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“…However, it is lower than that of the FZ. This hardness could be linked to the zones' martensitic microstructure and cooling rate [8,9,22,23]. There is a significant decrease in hardness within the BM, 343 ± 12 HV, compared to the HAZ and FZ.…”

Section: Microhardnessmentioning

confidence: 99%

Laser Butt Welding of Thin Ti6Al4V Sheets: Effects of Welding Parameters

et al. 2021

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Titanium and its alloys, particularly Ti6Al4V, which is widely utilized in the marine and aerospace industries, have played a vital role in different manufacturing industries. An efficient and cost-effective way of joining this metal is by laser welding. The effect of laser power and welding speed on the tensile, microhardness, and microstructure of Ti6Al4V alloy is investigated in this paper. Results show that the microhardness is highest at the fusion zone and reduces towards the base metal. The microstructure at the fusion zone shows a transformed needle-like lamellar α phase, with a martensitic α’ phase observed within the heat affected zone. Results of tensile tests show an improved tensile strength compared to the base metal.

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“…In the present scenario, research on welding and its analysis is still happening. Mostly metals such as Al, Tialloys, and diferent grades of steels have been thoroughly analyzed by the researchers to enhance their application range in industries [6,7]. Te importance of heat treatment to metals has also been extensively discussed to modify the mechanical properties such as strength [8], hardness [9], bending strength [10], toughness [11], and ductility [12].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis among Quenched, Tempered, and Stepped Cooled TIG Welded SS-304 Plates Based on Tensile Strength, Hardness, and Microstructural Appearance

Dewangan

Saksham

Paul

et al. 2023

Advances in Materials Science and Engineering

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The present experimental work critically analyses the changes in microstructural orientation and mechanical properties of TIG (tungsten inert gas) welded AISI-304 (SS) plates which have undergone through various heat treatments. The characteristics of heat-treated samples have been compared with those of untreated samples which is denoted by the original sample in this study. Five SS-304 plates were welded by the TIG method. Out of five, four plates were heat treated and one plate was put in the original condition. Four heat treatment includes quenching, stepped heat treating (sand + water), tempering-1 (quick quench then sand cooling), and tempering-2 (quick quench then air cooling). In all the five plates, the tensile test and microhardness test have been performed. In addition, microscopic observation of cross-sectional surfaces has also been carried out. The base metal (BM) zone of all five plates mainly consists of equiaxed γ-grains, although twin can be observed only in the original sample. The heat-affected zone (HAZ) imparts both lathy and dendritic type δ-ferrite at the transition of the BM and welded zone (WZ). At the welded zone, the γ-matrix has become coarse with numerous spots and dendrites of δ-ferrite could be seen. Sample 3, tempered by means by water sprinkling for a very short time and then cooling in sand, has shown satisfactory results among all. The sample has achieved the 23% higher extension value and 10% higher hardness at WZ than these of the original sample, although a negligible loss (0.2%) of ultimate tensile strength (UTS) is also reported in sample 3.

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Investigation of microstructure and mechanical properties of titanium alloy sheet using low power Nd-YAG laser welding process

Cited by 13 publications

References 19 publications

Preliminary Investigations of Structure and Properties of TIG Welded Ti-6Al-4V Alloy

Preliminary Investigations of Structure and Properties of TIG Welded Ti-6Al-4V Alloy

Laser Butt Welding of Thin Ti6Al4V Sheets: Effects of Welding Parameters

A Comparative Analysis among Quenched, Tempered, and Stepped Cooled TIG Welded SS-304 Plates Based on Tensile Strength, Hardness, and Microstructural Appearance

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