A review of microstructure and texture evolution during plastic deformation and heat treatment of β-Ti alloys

Gupta, Aman; Khatirkar, Rajesh K.; Singh, Jaiveer

doi:10.1016/j.jallcom.2021.163242

Cited by 83 publications

(17 citation statements)

References 146 publications

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“…It can be also remarked that deformation bands and twins become more and more visible as the intensity of cold-rolling deformation increases. Similar observations were obtained in the case of different types of Ti alloys [ 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 ]. The most obvious microstructural features induced by the intense deformation are shown in Figure 3 d, which illustrates the microstructure of the TNZT alloy when subjected to a 60% deformation degree.…”

Section: Resultssupporting

confidence: 85%

Evolution of Microstructural and Mechanical Properties during Cold-Rolling Deformation of a Biocompatible Ti-Nb-Zr-Ta Alloy

et al. 2022

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In this study, a Ti-32.9Nb-4.2Zr-7.5Ta (wt%) titanium alloy was produced by melting in a cold crucible induction in a levitation furnace, and then deforming by cold rolling, with progressive deformation degrees (thickness reduction), from 15% to 60%, in 15% increments. The microstructural characteristics of the specimens in as-received and cold-rolled conditions were determined by XRD and SEM microscopy, while the mechanical characteristics were obtained by tensile and microhardness testing. It was concluded that, in all cases, the Ti-32.9Nb-4.2Zr-7.5Ta (wt%) showed a bimodal microstructure consisting of Ti-β and Ti-α″ phases. Cold deformation induced significant changes in the microstructural and the mechanical properties, leading to grain-refinement, crystalline cell distortions and variations in the weight-fraction ratio of both Ti-β and Ti-α″ phases, as the applied degree of deformation increased from 15% to 60%. Changes in the mechanical properties were also observed: the strength properties (ultimate tensile strength, yield strength and microhardness) increased, while the ductility properties (fracture strain and elastic modulus) decreased, as a result of variations in the weight-fraction ratio, the crystallite size and the strain hardening induced by the progressive cold deformation in the Ti-β and Ti-α″ phases.

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Section: Resultssupporting

confidence: 85%

Evolution of Microstructural and Mechanical Properties during Cold-Rolling Deformation of a Biocompatible Ti-Nb-Zr-Ta Alloy

et al. 2022

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“…In addition to the alloy composition, microstructure and mechanical properties of metastable β-type Ti alloys are highly dependent on the thermomechanical process. [8,[61][62][63][64][65][66] For example, annealing temperature and time are important parameters in controlling microstructure and mechanical properties. Matsumoto et al investigated the microstructural changes during thermomechanical processing and the mechanical properties in a (Ti-35Nb)-4Sn (wt%) alloy.…”

Section: Discussionmentioning

confidence: 99%

“…[61] Cold rolling ratio is also an important parameter because not only deformation texture but also recrystallization texture is strongly dependent on the deformation ratio. [62][63][64] Recently, it was suggested that Young's modulus of a Ti-13Nb-13Zr (wt%) alloy could be further reduced by a cold caliber rolling due to the formation of fine (α 0 þα 00 ) structure. [65] This study focused on the effect of the Nb content and Sn content on the microstructure and mechanical properties using solution-treated specimens.…”

Section: Discussionmentioning

confidence: 99%

Achievement of Ultralow Elastic Modulus through Optimization of Phase Stability and Recrystallization Texture in Ti–Nb–Fe–Sn Alloys

et al. 2023

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Ti–Nb–Fe–Sn alloys with relatively low Nb content, located near the phase boundary of (β + ω)/β, are designed on the basis of electron‐to‐atom (e/a) ratio, d‐electron alloy design concept, and Mo equivalent (Moeq) aiming at low Young's modulus comparable to human bone. The effect of Sn content and Nb content on the microstructure and the mechanical properties is investigated in Ti–5Nb–3Fe–(0–6)Sn (at%) and Ti–(3–9)Nb–3Fe–4Sn (at%) alloys. The composition dependence of Young's modulus and tensile strength of Ti–Nb–Fe–Sn alloys is analyzed in terms of the phase stability, ω phase, and recrystallization texture. Both Nb and Sn are effective in suppressing the athermal ω phase and stabilizing the β phase. The recrystallization texture is strongly influenced by the content of Sn and Nb. A strong {110}β<001>β Goss texture is formed in the Ti–5Nb–3Fe–(2–4)Sn and Ti–(3–5)Nb–3Fe–4Sn alloys. The Ti–5Nb–3Fe–4Sn alloy exhibits an exceptionally low Young's modulus of 30 GPa due to the combined effects of low stability of the β phase, a small amount of ω phase, and a strong Goss texture.

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“…When the strain rate is 0.001s -1 , it can be seen from figure 5(a) that fine recrystallized grains are found in some triple junction, and the orientations of these grains are significantly different from that of the original β grains, which is a typical DDRX characteristic [15]. In addition, some β grains are divided into several fine sub-grains by LAGBs distributed within the grains, which may be the result of CDRX [16]. These sub-grains are likely to evolve into new grains as the strain increases.…”

Section: Analysis Of Recrystallization Mechanismmentioning

confidence: 99%

Study on dynamic recrystallization mechanism and model of TB15 titanium alloy

Zhang

Dong

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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TB15 titanium alloy has shown a good application prospect in aviation large-scale structural parts. In this paper, the dynamic recrystallization (DRX) mechanism and model of TB15 titanium alloy were studied by thermal simulation compression experiment in temperature range of 810-930°C and strain rate range of 0.001s−1-10s−1. The microstructures under different deformation conditions were analyzed by optical microscopy (OM) and electron back scatter diffraction (EBSD). The results show that the degree of dynamic recrystallization decreased significantly with the increase of strain rate, and the nucleation position of dynamic recrystallization tended to migrate from the interior of grain to grain boundary. At low strain rate, the continuous dynamic recrystallization (CDRX) mechanism of subgrain merging and rotation was dominant. When the strain rate was 10s−1, the rare geometric dynamic recrystallization (GDRX) occurred due to strong strain concentration effect, and the dynamic recrystallization grains showed fine chain distribution. Finally, the DRX critical strain, volume fraction and grain size models of the studied alloy were established, and the DRX volume fraction model was modified by quantitative microstructure.

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A review of microstructure and texture evolution during plastic deformation and heat treatment of β-Ti alloys

Cited by 83 publications

References 146 publications

Evolution of Microstructural and Mechanical Properties during Cold-Rolling Deformation of a Biocompatible Ti-Nb-Zr-Ta Alloy

Evolution of Microstructural and Mechanical Properties during Cold-Rolling Deformation of a Biocompatible Ti-Nb-Zr-Ta Alloy

Achievement of Ultralow Elastic Modulus through Optimization of Phase Stability and Recrystallization Texture in Ti–Nb–Fe–Sn Alloys

Study on dynamic recrystallization mechanism and model of TB15 titanium alloy

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