Effect of Cold Rolling and Heat Treatment on Microstructure and Mechanical Properties of Ti-4Al-1Mn Titanium Alloy

Gaur, Rishi; Gupta, Rohit; Kumar, V. Anil; Banwait, S. S.

doi:10.1007/s11665-018-3412-9

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…Taking into account the demand for implantable biomaterials characterized by a low elasticity modulus (E) [33][34][35][36][37][38][39][40][41][42], the need for an internal microstructure capable of providing this has emerged-a homogenous β-Ti phase microstructure possessing small grain size/crystallite size and high mechanical properties being essential [32,43]. The microstructures/mechanical properties obtained after cold-rolling processing can be further improved by applying different thermal treatments to induce the alloy's internal microstructure/mechanical properties towards a decreased elasticity modulus (Young's modulus)/increased strength [44][45][46][47][48][49][50][51][52][53].…”

Section: Cold-deformed By Rolling (Cr) State Of the Tnztsf Alloymentioning

confidence: 99%

Effect of Cold-Rolling Deformation on the Microstructural and Mechanical Properties of a Biocompatible Ti-Nb-Zr-Ta-Sn-Fe Alloy

Cojocaru,

Dan,

Șerban

et al. 2024

Materials

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The primary focus of the current paper centers on the microstructures and mechanical properties exhibited by a Ti-30Nb-12Zr-5Ta-2Sn-1.25Fe (wt. %) (TNZTSF) alloy that has been produced through an intricate synthesis process comprising cold-crucible induction in levitation, carried out in an atmosphere controlled by argon, and cold-rolling deformation (CR), applying systematic adjustments in the total deformation degree (total applied thickness reduction), spanning from 10% to 60%. The microstructural characteristics of the processed specimens were investigated by SEM and XRD techniques, and the mechanical properties by tensile and microhardness testing. The collected data indicate that the TNZTSF alloy’s microstructure, in the as-received condition, consists of a β-Ti phase, which shows polyhedral equiaxed grains with an average grain size close to 82.5 µm. During the cold-deformation processing, the microstructure accommodates the increased applied deformation degree by increasing crystal defects such as sub-grain boundaries, dislocation cells, dislocation lines, and other crystal defects, powerfully affecting the morphological characteristics. The as-received TNZTSF alloy showed both high strength (i.e., ultimate tensile strength close to σUTS = 705.6 MPa) and high ductility (i.e., elongation to fracture close to εf = 11.1%) properties, and the computed β-Ti phase had the lattice parameter a = 3.304(7) Å and the average lattice microstrain ε = 0.101(3)%, which are drastically influenced by the applied cold deformation, increasing the strength properties and decreasing the ductility properties due to the increased crystal defects density. Applying a deformation degree close to 60% leads to an ultimate tensile strength close to σUTS = 1192.1 MPa, an elongation to fracture close to εf = 7.9%, and an elastic modulus close to 54.9 GPa, while the computed β-Ti phase lattice parameter becomes a = 3.302(1) Å.

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Section: Cold-deformed By Rolling (Cr) State Of the Tnztsf Alloymentioning

confidence: 99%

Effect of Cold-Rolling Deformation on the Microstructural and Mechanical Properties of a Biocompatible Ti-Nb-Zr-Ta-Sn-Fe Alloy

Cojocaru,

Dan,

Șerban

et al. 2024

Materials

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“…The YS and UTS decreased overall after STA. This is due to the greater reduction in the work hardening effects by grain growth [21], and the decrease in dislocation density and plastic deformation energy [22], despite a hardening effect by the precipitates of the ω phase after the aging treatment [23]. In the case of the TNZ40 + 0.2 Si alloy, the YS (915 MPa) and UTS (942 MPa) increased after the heat treatment, due to the precipitation hardening effects of the Ti silicides by over-aging.…”

Section: Variation Of Mechanical Propertiesmentioning

confidence: 99%

Effects of Silicon and Heat-Treatment on Microstructure and Mechanical Properties of Biomedical Ti-39Nb-6Zr Alloy

Jang

Lee

2021

Metals

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The cytotoxic tissue reactions of alloying elements (Al, V) of Ti-6Al-4V have been reported, whereas the Ti-39Nb-6Zr (TNZ40) alloy developed by adding β-phase stabilizing elements is known to have no cytotoxicity and exhibits excellent biocompatibility. In addition, there is a slight modulus difference between the TNZ40 alloy and human bones as the elastic modulus of the TNZ40 alloy is very low. This can inhibit detrimental effects such as osteoblast loss due to a stress-shielding effect. In this study, various Si contents were added and heat treatment under various conditions was performed to control the microstructure and mechanical properties of the TNZ40 alloy. In the β-type titanium alloy, the ω phase is commonly observed by quenching from the solution-treatment or aging-treatment temperature. These ω precipitates can typically increase the elastic modulus, hardness, and embrittlement of the β-type titanium alloy, which are important to control this phase. The correlation between Si content and precipitation and the effects of solution treatment and aging condition on the mechanical properties such as tensile strength, and hardness, were analyzed.

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“…It cannot be separated from dislocation movement. In cold worked condition, the microstructure shows fine fragmented α plate with high dislocation density along with a large amount of strain fields and winning [17]. The surface area of high-angle grain boundaries was almost tripled, thus giving rise to an ultra-fine microstructure for heavily cold-rolled alpha-titanium [18].…”

Section: Microstructural Evolvement and Cold Forming Propertiesmentioning

confidence: 99%

Effects of Rolling Reduction on Cold Forming Properties of Commercially Pure Titanium Sheet

Zhang

Cai

Wang

et al. 2019

MSF

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Different cold rolling reductions were adopted for commercially pure titanium sheet. Cold forming properties were investigated by a microstructural analysis, Vickers microhardness and erichsen value measurements. The results have shown that Cold rolling resulted in refined alpha grains. Alpha grain size was refined further by greater cold reduction. Alpha grain sizes of the specimens of processing 1, 2 and 3 reached 30.90 μm, 26.48 μm and 20.58 μm, respectively. Cold forming properties were affected by different alpha grain sizes. The hardness and erichsen value reached the lowest and the highest values for the specimens in processing 1. The hardness increased and erichsen value decreased due to the finer alpha grain size for the specimen which was cold-rolled at a reduction of 50% in processing 2. Erichsen test results of the specimens of processing 3 had the lowest values due to the deformation of a reduction of 70%. Cold forming properties of the specimens of processing 3 were deteriorated, this is because deformation leads to the high dislocation density and the stored energy increases with accumulated strain after deformation.

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Effect of Cold Rolling and Heat Treatment on Microstructure and Mechanical Properties of Ti-4Al-1Mn Titanium Alloy

Cited by 14 publications

References 22 publications

Effect of Cold-Rolling Deformation on the Microstructural and Mechanical Properties of a Biocompatible Ti-Nb-Zr-Ta-Sn-Fe Alloy

Effect of Cold-Rolling Deformation on the Microstructural and Mechanical Properties of a Biocompatible Ti-Nb-Zr-Ta-Sn-Fe Alloy

Effects of Silicon and Heat-Treatment on Microstructure and Mechanical Properties of Biomedical Ti-39Nb-6Zr Alloy

Effects of Rolling Reduction on Cold Forming Properties of Commercially Pure Titanium Sheet

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