Fracture toughness of friction stir welded TA5 titanium alloy joint

Gao, Fuyang; Yi, Guo; Shengwen, Qiu; Yu, Yang; Yu, Wei

doi:10.1016/j.msea.2020.138962

Cited by 23 publications

(11 citation statements)

References 20 publications

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“…The welded zone had fine α phases. The fracture was mainly inter-granular in nature [23]. A complex thermal gradient was also reported during the TIG welding of Ti-6Al-4V alloy.…”

Section: Introductionmentioning

confidence: 62%

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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“…The welded zone had fine α phases. The fracture was mainly inter-granular in nature [23]. A complex thermal gradient was also reported during the TIG welding of Ti-6Al-4V alloy.…”

Section: Introductionmentioning

confidence: 62%

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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“…For comparison purposes and to abstract the effect on different zone energy release rates, the yield stress (105.6 ± 1.8 MPa) of the BM was used in the above expression. 16 The energy release rate of WNZ, TMAZ, and HAZ was 162, 132, and 250 J m −2 , respectively. HAZ showed the highest G IC and this increase in G IC can be credited to increased grain size, lower hardness relative to WNZ and other zones, and the presence of coarser precipitates both of them believed to increase the resistance and slow the crack propagation rate.…”

Section: Fracture Toughnessmentioning

confidence: 94%

“…In the case of ductile material, the plastic deformation ahead of a crack tip will lead to strain hardening, consequently greater the ability to strain harden as well as resist the crack propagation and thus higher the corresponding value of fracture toughness. [16][17][18] As the microstructure and precipitate morphology of one zone of FSW weld are different from other zones therefore mechanical, corrosion, fatigue, and crack propagation behavior are also different. FSW weld of AA2024-T3 was more resistant to longitudinally growing fatigue cracks than the base metal (BM) at threshold ΔK values under constant loading amplitude owing to the beneficial influence of compressive residual stresses.…”

Section: Introductionmentioning

confidence: 99%

“…14 Therefore, the influence of welding process parameters and temper conditions on fracture toughness is an important issue to understand. 15,16 Fracture toughness is defined as the ability of the material to resist quasi-static crack propagation. In the case of ductile material, the plastic deformation ahead of a crack tip will lead to strain hardening, consequently greater the ability to strain harden as well as resist the crack propagation and thus higher the corresponding value of fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of fatigue crack growth rate in different zones of friction stir welded AA7039

Sharma¹,

Verma²,

Basanthkumar³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The present research aims to study the fatigue crack propagation and fracture toughness behavior of different zones of friction stir welds of AA7039 alloy, as different zones had varying microstructural and mechanical properties. Compact tension specimens with an initial notch in distinct weld zones parallel to the welding direction were machined using welded plates. Friction stir welding altered the base metal grain structure momentously, refined the grain structure in the weld nugget zone, and coarsen the same in the heat-affected zone. No correlation was observed between grain size and weld zone(s) hardness. Weld tensile properties were slightly inferior to base metal despite significantly higher hardness and alternation of grain structure. The fatigue life was dominated by the cycles consumed in crack propagation than crack initiation. The heat-affected zone had higher quasi-static fracture toughness, energy release rate, and resistance toward fatigue crack growth than other zones, because coarse grains and precipitates acted as effective impediments and slowed crack propagation. The heat-affected zone had a mixed-mode fracture, but the weld nugget zone and thermo-mechanically affected zone had an I mode fracture. On fracture surfaces, fracture characteristics such as microvoid coalescence were apparent.

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“…In its early stages, FSW was intended for welding aluminum alloys [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. Nonetheless, FSW proved its effectiveness in joining a wide variety of metals such as steel [ 38 , 39 , 40 , 41 , 42 , 43 ], magnesium [ 44 , 45 , 46 , 47 , 48 ], and titanium [ 49 , 50 , 51 , 52 ]. Successful joints were made of polymers such as Polyethylene (PE) [ 53 , 54 ], Polycarbonate (PC) [ 55 , 56 ], and Polymethyl Methacrylate (PMMA) [ 57 , 58 ].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Technical Review of the Friction Stir Welding of Metal-to-Polymer Hybrid Structures

et al. 2022

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Metal–polymer hybrid structures are becoming desirable due to their wide range of applications in the automotive, aerospace, biomedical and construction industries. Properties such as a light weight, high specific strength, and design flexibility along with the low manufacturing costs of metal–polymer hybrid structures make them widely attractive in several applications. One of the main challenges that hinders the widespread utilization of metal–polymer hybrid structures is the challenging dissimilar joining of metals to polymers. Friction stir welding (FSW) shows a promising potential in overcoming most of the issues and limitations faced in the conventional joining methods of such structures. Several works in the literature have explored the FSW of different metal-to-polymer combinations. In some of the works, the joints are examined based on processing parameter optimization, microstructural characteristics, and mechanical performances. It is, therefore, important to summarize the findings of these works as a means of providing a reference to researchers to facilitate further research on the utilization of FSW in joining metals to polymers. Thus, this work aims to present a comprehensive technical review on the FSW technique for joining metals to polymers by reviewing the reported literature findings on the impact of materials, tools, process parameters, and defects on the strength and microstructure of the produced joints. In addition, this work reviews and presents the latest practices aiming to enhance the metal–polymer joint quality that have been reported in the literature.

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Fracture toughness of friction stir welded TA5 titanium alloy joint

Cited by 23 publications

References 20 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

Estimation of fatigue crack growth rate in different zones of friction stir welded AA7039

A Comprehensive Technical Review of the Friction Stir Welding of Metal-to-Polymer Hybrid Structures

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