Effect of Heat Treatment and Combination of Cold Rolling and Heat Treatment on Microstructure and Mechanical Properties of Titanium Alloy Ti6Al2V2Zr1.5Mo

Gupta, Rohit; Kumar, V. Anil; Gaur, Rishi; Singh, Bhavanish Kumar

doi:10.1007/s11665-018-3576-3

Cited by 4 publications

(1 citation statement)

References 23 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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