Superplasticity and Its Application of Ultra-Fine Grained Ti-6Al-4V Alloy Obtained through Protium Treatment

Nakahigashi, Jun; Yoshimura, Hirofumi

doi:10.2320/matertrans.43.2768

Cited by 16 publications

(7 citation statements)

References 4 publications

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“…Kim et al [51] proposed lattice diffusion-controlled GBS as a deformation mechanism for high-strain-rate superplasticity in 0.3-0.4-μm-sized grain Al alloy. Superplastic elongation of 9000% was achieved in an ultrafine-grained Ti-6Al-4 V alloy at 850°C [52]. However, Cu-Zn-Zr alloy exhibited superplasticity at a temperature above 400°C and at strain rates below 1 × 10 −3 s −1 .…”

Section: Ultrafine-grained Superplasticitymentioning

confidence: 95%

Effect of Grain Size on Superplastic Deformation of Metallic Materials

Raja¹,

Jayaganthan²,

Tiwari³

et al. 2020

Aluminium Alloys and Composites

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The superplastic deformation exhibited by metals with different grain sizes and their corresponding deformation mechanism influences the industrial metalforming processes. The coarse-grained materials, which contain grain size greater than 20 μm, exhibited superplastic deformation at high homologous temperature and low strain rate of the order of 10 −4 s −1. Fine grain materials (1-20 μm) are generally considered as favorable for superplastic deformation. They possess highstrain-rate sensitivity "m" value, approximately, equal to 0.5 at the temperature of 0.5 times the melting point and at a strain rate of 10 −3 to 10 −4 s −1. Ultrafine grains (100 nm to less than 1 μm) exhibit superplasticity at high strain rate as well as at low temperature when compared to fine grain materials. It is attributed to the fact that both temperature and strain rates are inversely proportional to the grain size in Arrhenius-type superplastic constitute equation. The superplastic phenomenon with nano-sized grains (10 nm to less than 100 nm) is quite different from their higher-scale counterparts. It exhibits high ductility with high strength. Materials with mixed grain size distribution (bimodal or layered) are found to exhibit superior superplasticity when compared to the homogeneous grain-sized material. The deformation mechanisms governing these superplastic deformations with different scale grain size microstructures are discussed in this chapter.

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Section: Ultrafine-grained Superplasticitymentioning

confidence: 95%

Effect of Grain Size on Superplastic Deformation of Metallic Materials

Raja¹,

Jayaganthan²,

Tiwari³

et al. 2020

Aluminium Alloys and Composites

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show abstract

“…Owing to this attractive potential, many studies have investigated for heat treatments to obtain various microstructures and their effect on the mechanical properties of the alloy. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] One of the well-known heat treatments is solution treatment and quenching plus aging. With this series of heat treatment, the tensile strength of Ti-6Al-4V alloy is increased by the transformation of phase to 0 martensite phase and its decomposition to fine and phases.…”

Section: Introductionmentioning

confidence: 99%

Strengthening of Ti–6Al–4V Alloy by Short-Time Duplex Heat Treatment

et al. 2005

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The effect of short-time duplex heat treatment on the microstructure and mechanical properties of Ti-6Al-4V alloy was investigated. This heat treatment consisted of solution treatment at 1203 K for 60 s and subsequent water-quenching plus aging at 753, 853 and 953 K for 40 s. The yield strength and tensile strength of the alloy were significantly increased by the above heat treatment and their maximum improvement rates reached about 25%. It was thought that this strengthening was caused by the formation of 0 martensite phase with quenching after the short-time solution treatment and the precipitation of fine phase in the retained phase during the short-time aging. In spite of the remarkable improvement in the strength, the ductility of the heat-treated materials remained above the level of the non-treated material, most likely because strain-induced martensite transformation occurred in phase which was retained even after the short-time aging.

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“…Denture bases were fabricated by superplastic formation of hydrogen-treated Ti-6Al-4V alloy (Nakahigashi and Yoshimura, 2002). hydrogen treatment of a + b type Ti alloys in combination with superplastic forming is a suitable technique to fabricate implants with complicated shapes and small production mass.…”

Section: Hydrogen Treatmentmentioning

confidence: 99%

New-generation metallic biomaterials

Narushima

2010

Metals for Biomedical Devices

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Superplasticity and Its Application of Ultra-Fine Grained Ti-6Al-4V Alloy Obtained through Protium Treatment

Cited by 16 publications

References 4 publications

Effect of Grain Size on Superplastic Deformation of Metallic Materials

Effect of Grain Size on Superplastic Deformation of Metallic Materials

Strengthening of Ti–6Al–4V Alloy by Short-Time Duplex Heat Treatment

New-generation metallic biomaterials

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Superplasticity and Its Application of Ultra-Fine Grained Ti-6Al-4V Alloy Obtained through Protium Treatment

Cited by 16 publications

References 4 publications

Effect of Grain Size on Superplastic Deformation of Metallic Materials

Effect of Grain Size on Superplastic Deformation of Metallic Materials

Strengthening of Ti&ndash;6Al&ndash;4V Alloy by Short-Time Duplex Heat Treatment

New-generation metallic biomaterials

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Strengthening of Ti–6Al–4V Alloy by Short-Time Duplex Heat Treatment