Ultrafine-grained β-type titanium alloy with nonlinear elasticity and high ductility

Li, S. J.; Cui, Tiancheng; Li, Y. L.; Hao, Yulin; Yang, Rui

doi:10.1063/1.2839594

Cited by 37 publications

(21 citation statements)

References 15 publications

(11 reference statements)

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“…Indeed, due to this martensitic transformation, the Ti2448 alloy shows good superelasticity at room temperature characterized by a large recoverable strain of 3.3% [1][2][3]. This recoverable strain is much higher than that observed in the conventional Ti-6Al-4V alloy and in other binary Ti-Nb superelastic alloys [4,5].…”

Section: Introductionmentioning

confidence: 83%

Characterization of the martensitic transformation in the superelastic Ti–24Nb–4Zr–8Sn alloy by in situ synchrotron X-ray diffraction and dynamic mechanical analysis

et al. 2015

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In this work, the martensitic transformation occurring in the superelastic Ti-24Nb-4Zr-8Sn alloy was investigated by tensile tests, in situ synchrotron X-ray diffraction (SXRD) and dynamic mechanical analysis (DMA). The SXRD results clearly showed the diffraction peaks related to the a 00 and b phases and their evolution, under loading and unloading conditions, have highlighted the reversible stress-induced martensitic (SIM) transformation. Consequently, a three step deformation sequence was established from both SXRD analysis and tensile test characterization. On the other hand, the characteristic temperatures related to the martensitic transformation under different applied stresses have been determined from the storage modulus and the damping curves by DMA analysis. Very good accordance concerning the critical stress inducing the martensitic transformation was obtained by comparing the results obtained from SXRD, DMA and tensile tests.

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Section: Introductionmentioning

confidence: 83%

Characterization of the martensitic transformation in the superelastic Ti–24Nb–4Zr–8Sn alloy by in situ synchrotron X-ray diffraction and dynamic mechanical analysis

et al. 2015

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“…In previous works, different kinds of thermo-mechanical treatments were used for the processing of the alloy (cold deformation, hot rolling and warm rolling) [1][2][3][4][5][6]. Thanks to these investigations, a superelasticity of about 3.3% was obtained [3][4][5][6], which is much higher than the values usually obtained with binary Ti-Nb alloys [7][8][9]. Moreover, " flash treatments "…”

Section: Introductionmentioning

confidence: 86%

“…A hot-forged Ti2448 cylinder with diameter of 55 mm was used as raw material 3 in this work. The chemical composition of the alloy is given in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Texture investigation of the superelastic Ti–24Nb–4Zr–8Sn alloy

Yang

Castany

Cornen

et al. 2014

Journal of Alloys and Compounds

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“…This approach, commonly referred to as strain induced phase transformations (SIT), has shown great potential in the development of ultra-fine grain structures not only in steels, but also in other metallic materials [3][4]. Because there are so many parallels between the J-to-α phase transformation in iron-based alloys and the β-to-α phase transformation in titanium-based alloys, there is reason to believe that strain-induced phase transformations in titanium alloys can in similar vein, lead to the development of fine-grained microstructures.…”

Section: Introductionmentioning

confidence: 99%

Strain-induced phase transformation during thermo-mechanical processing of titanium alloys

Dehghan-Manshadi

Dippenaar

2012

Materials Science and Engineering: A

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Strain-induced phase transformation studies have been conducted in a Ti-6Al-2Sn-4Zr-6Mo alloy. This alloy was subjected to b sub-transus deformation upon slow cooling from the b-phase field and the effect of strain on the extent and morphology of the phase transformation during hot-deformation was determined. In addition, the transformation kinetics and the morphology of the newly formed a-phase were studied following deformation under different cooling conditions. By applying strain, the rate of the b-to-a phase transformation increased significantly during deformation as well as during slow cooling following deformation. This increase in the kinetics of the b-to-a transformation can be ascribed to straininduced phase transformation. Also, the extent of deformation of the b-phase had a marked effect on the resulting morphology and size of the newly formed a-phase. Transformation of un-deformed b-phase rendered a-phase of acicular morphology only. However, following deformation of the b-phase, acicular as well as globular a-phase morphologies have been observed upon cooling. alloy. This alloy was subjected to β sub-transus deformation upon slow cooling from the β-phase field and the effect of strain on the extent and morphology of the phase transformation during hot-deformation was determined. In addition, the transformation kinetics and the morphology of the newly formed D-phase were studied following deformation under different cooling conditions. By applying strain, the rate of the β-to-α phase transformation increased significantly during deformation as well as during slow cooling following deformation. This increase in the kinetics of the E-to-D transformation can be ascribed to strain-induced phase transformation. Also, the extent of deformation of the β-phase had a marked effect on the resulting morphology and size of the newly-formed D-phase. Transformation of un-deformed β-phase rendered D-phase of acicular morphology only. However, following deformation of the β-phase, acicular as well as globular D-phase morphologies have been observed upon cooling.

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Ultrafine-grained β-type titanium alloy with nonlinear elasticity and high ductility

Abstract: Articles you may be interested inSn and Nb modified ultrafine Ti-based bulk alloys with high-strength and enhanced ductility

Cited by 37 publications

References 15 publications

Characterization of the martensitic transformation in the superelastic Ti–24Nb–4Zr–8Sn alloy by in situ synchrotron X-ray diffraction and dynamic mechanical analysis

Characterization of the martensitic transformation in the superelastic Ti–24Nb–4Zr–8Sn alloy by in situ synchrotron X-ray diffraction and dynamic mechanical analysis

Texture investigation of the superelastic Ti–24Nb–4Zr–8Sn alloy

Strain-induced phase transformation during thermo-mechanical processing of titanium alloys

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