Evolution of microstructure and mechanical properties of Ti6Al4V alloy by multiple passes of constrained groove pressing at elevated temperature

Bhardwaj, A.; Mudaliar, Vishwesh; Gohil, Naishadh; Gupta, Amit Kumar; Kumar, Sanjeev

doi:10.1016/j.jmatprotec.2020.116891

Cited by 14 publications

(4 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Like in previous studies 61,100,103–105 of magnesium alloys, many other alloys 102,106–109 also demonstrate the characteristics of thermal stability and its effect on mechanical properties as shown in Table 3. 6061 aluminum alloy, 106 low carbon steel, 107 and NiTi alloy 102 are initially processed through CGP followed by annealing at various temperature ranges.…”

Section: Advanced Developing Processes Of Cgpsupporting

confidence: 65%

“…However, the strength and hardness reduce after holding for a longer time at higher temperatures due to grain growth, but they are still greater than the initial sample due to the absence of abnormal grain growth. 104 In some literature, Ti6Al4V titanium alloy, 108,109 2024 aluminum alloy, 111 and Cu-Zn alloy 110 are processed through CGP at elevated temperatures to study the microstructural evolution and mechanical properties as shown in Table 4. Grain refinement and strain hardening occur in the processed sample and are confirmed by XRD, texture, and microstructural analysis.…”

Section: Annealing Of Cgp Samplesmentioning

confidence: 99%

“…In some literature, Ti6Al4V titanium alloy, 108,109 2024 aluminum alloy, 111 and Cu–Zn alloy 110 are processed through CGP at elevated temperatures to study the microstructural evolution and mechanical properties as shown in Table 4. Grain refinement and strain hardening occur in the processed sample and are confirmed by XRD, texture, and microstructural analysis.…”

Section: Advanced Developing Processes Of Cgpmentioning

confidence: 99%

See 2 more Smart Citations

Developing methods of constrained groove pressing technique: A review

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

Among various severe plastic deformation (SPD) techniques, constrained groove pressing (CGP) has arisen as a famous technique for fabricating ultrafine-grained sheet metals and alloys in recent times. The severe strain is applied to improve the mechanical performance and properties. However, inhomogeneous grain refinement, lower formability, surface unevenness, and microcracks are the common limitations of conventional CGP-processed samples. Therefore, this review inspects the latest progress through modifications of the CGP process and compares the process efficacy with the conventional process. Advanced CGP processing techniques, such as modification of die design, annealing of the processed sample, cross CGP, ring CGP, hybrid SPD, covered sheet casing CGP, and rubber pad CGP, are emerging techniques to up-scale the procedure and improve the grain refinement and thereby produce superior mechanical properties. In this review paper, the historic research of conventional CGP and its effect on grain refinement and mechanical properties is initially briefed and then recent progress through different advanced techniques is highlighted, especially in alloys. Albeit significant progress has been observed in CGP, the future scope and successful usage of CGP-processed samples in actual practice are discussed in the last stage.

show abstract

Section: Advanced Developing Processes Of Cgpsupporting

confidence: 65%

Section: Annealing Of Cgp Samplesmentioning

confidence: 99%

Section: Advanced Developing Processes Of Cgpmentioning

confidence: 99%

See 1 more Smart Citation

Developing methods of constrained groove pressing technique: A review

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…In the last two decades, there has been a notable emphasis on researching the production of UFG materials through SPD. Titanium alloys, such as Ti-6Al-4V, can be effectively processed using a range of SPD techniques, including Multi-axial Forging (MF) [ 4 ], High-Pressure Torsion (HPT) [ 5 ], Equal Channel Angular Pressing (ECAP) [ 6 , 7 ], Constrained Groove Pressing (CGP) [ 8 , 9 ], and Accumulative Roll Bonding (ARB) [ 10 ]. Employing diverse heat treatment processes on the Ti-6Al-4V alloy can yield a range of microstructures, including the fully equiaxed structure [ 11 ], widmanstätten structure [ 12 ], bimodal structure [ 13 ], martensitic structure [ 14 ], lamellar structure [ 15 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure and Mechanical Properties of Ti-6Al-4V Alloy under Heat Treatment and Multi-Axial Forging

Du,

Song,

et al. 2024

Materials

View full text Add to dashboard Cite

The mechanical properties of various Ti-6Al-4V alloys are influenced by their respective microstructures. This study generated an ultrafine-grain (UFG) Ti-6Al-4V alloy featuring bimodal grain distribution characteristics achieved through initial heat treatment, multi-axial forging (MF), and annealing. The study also extensively examined the evolution process of the alloy’s microstructure. By subjecting the materials to heat treatments at 900 °C with air cooling and 950 °C with air cooling, both materials were found to be consisted of primary α (αp) and transformed β (αs+β) regions with different proportions. Following MF, the sample treated at 900 °C displays a microstructure featuring UFGs of α+β surrounding larger micron-sized αp grains. On the other hand, the sample treated at 950 °C displays a microstructure distinguished by twisted αs lamellar and fragmented β grains surrounding larger micron-sized αp grains. Following annealing, no significant grain growth was observed in the sample. The geometrically necessary dislocations (GNDs) within the UFGs were eliminated, though some GNDs persisted within the αp grains. The samples undergoing the 900 °C heat treatment, MF, and subsequent annealing exhibited elevated strength (1280 MPa) and total elongation (10.7%). This investigation introduces a novel method for designing the microstructure of the Ti-6Al-4V alloy to achieve superior performance.

show abstract