Mechanical behavior of ultrafine-grained titanium rods obtained using severe plastic deformation

Semenova, Irina P.; Korshunov, A. I.; Salimgareeva, Gulnaz; Латыш, В. В.; Yakushina, E.; Valiev, Ruslan Z.

doi:10.1134/s0031918x08080140

Cited by 12 publications

(5 citation statements)

References 5 publications

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“…Recently developed approaches for effectively enhancing the mechanical and fatigue properties of CP Ti through grain refinement and nanostructuring by severe plastic deformation (SPD) techniques9 may offer a new chance to solve the problem mentioned above. The new SPD processing method, namely equal channel angular pressing (ECAP) with follow‐up drawing and annealing can maximize the sizable products up to 3000 mm in length and 4–8 mm in diameter, with h8 tolerance10 and bending no more than 2 mm per meter 11–13. The bulk samples with nanocrystalline microstructure ensure the cornerstone of industrialization of bulk nanostructured materials for its biomedical application11 with following advantages.…”

Section: Introductionmentioning

confidence: 99%

“…The new SPD processing method, namely equal channel angular pressing (ECAP) with follow-up drawing and annealing can maximize the sizable products up to 3000 mm in length and 4-8 mm in diameter, with h8 tolerance 10 and bending no more than 2 mm per meter. [11][12][13] The bulk samples with nanocrystalline microstructure ensure the cornerstone of industrialization of bulk nanostructured materials for its biomedical application 11 with following advantages. First, expensive (and as a rule, toxic) alloying elements can be avoided because the required strength would be achieved by nanostructuring.…”

Section: Introductionmentioning

confidence: 99%

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In vitro and in vivo studies on nanocrystalline Ti fabricated by equal channel angular pressing with microcrystalline CP Ti as control

Nie

Zheng

Wei

et al. 2012

J Biomedical Materials Res

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Bulk nanocrystalline Ti bars (Grade 4, Φ4 × 3000 mm(3)) were massively fabricated by equal channel angular pressing (ECAP) via follow-up conform scheme with the microcrystalline CP Ti as raw material. Homogeneous nanostructured crystals with the average grain size of 250 nm were identified for the ECAPed Ti, with extremely high tensile/fatigue strength (around 1240/620 MPa) and adorable elongation (more than 5%). Pronounced formation of bonelike apatite for the nanocrystalline Ti group after 14 days static immersion in simulated body fluids (SBF) reveals the prospective in vitro bioactive capability of fast calcification, whereas an estimated 17% increment in protein adsorption represents good bioaffinity of nanocrystalline Ti. The documentation onto the whole life circle of osteoblast cell lines (MG63) revealed the strong interactions and superior cellular functionalization when they are co-incubated with bulk nanocrystalline Ti sample. Moreover, thread-structured specimens were designed and implanted into the tibia of Beagles dogs till 12 weeks to study the in vivo responses between bone and metallic implant made of bulk nanocrystalline Ti, with the microcrystalline Ti as control. For the implanted nanostructured Ti group, neoformed bone around the implants underwent the whole-stage transformation proceeding from originally osteons or immature woven bone to mature lamellar bone (skeletonic trabecular), even with the remodeling being finished till 12 weeks. The phenomenal osseointegration of direct implant-bone contact can be revealed from the group of the ECAPed Ti without fibrous tissue encapsulation in the gap between the implant and autogenous bone.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In vitro and in vivo studies on nanocrystalline Ti fabricated by equal channel angular pressing with microcrystalline CP Ti as control

Nie

Zheng

Wei

et al. 2012

J Biomedical Materials Res

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“…Thus, the elimination of structural anisotropy and mechanical properties in a material can be achieved with the combined SPD methods. In the first stage, equal channel angular pressing (ECAP) is used as one of the SPD methods, whereas in the second stage, the methods are cold and/or hot rolling, drawing or extrusion [58][59][60][61][62][63][64].…”

Section: Technological Aspects Of Combined Spd Including Mdf or Psc A...mentioning

confidence: 99%

“…Currently, the question of how to form UFG and NS states in bio-medical metal materials by SPD is being addressed by a number of research groups. These states can be achieved using the following methods: equal channel angular pressing and its modifications (ECAP) [34][35][36][37][38][39][40][41][42], high-pressure torsion [43][44][45], multidirectional forging (MDF) [46][47][48][49], and cyclic extrusion and compression (CEC) [49][50][51], as well as various methods of severe plastic deformation and rolling [52][53][54][55][56][57] and combined methods [58][59][60][61][62][63][64][65]. These methods can be used for the formation of UFG and NS structures in commercially pure titanium [36][37][38][39]50,51,65,66], in Ti-Nb alloy systems [67][68][69][70][71]…”

Section: Introductionmentioning

confidence: 99%

Development of Ultrafine–Grained and Nanostructured Bioinert Alloys Based on Titanium, Zirconium and Niobium and Their Microstructure, Mechanical and Biological Properties

Sharkeev

Eroshenko

Легостаева

et al. 2022

Metals

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For this paper, studies of the microstructure as well as the mechanical and biological properties of bioinert titanium, zirconium, and niobium alloys in their nanostructured (NS) and ultrafine-grained (UFG) states have been completed. The NS and UFG states were formed by a combined two-step method of severe plastic deformation (SPD), first with multidirectional forging (MDF) or pressing into a symmetrical channel (PSC) at a given temperature regime, and then subsequent multi-pass groove rolling (MPGR) at room temperature, with pre-recrystallization annealing. Annealing increased the plasticity of the alloys in the NS and UFG states without changing the grain size. The UFG structure, with an average size of structural elements of no more than 0.3 μm, was formed as a result of applying two-step SPD and annealing. This structure presented significant improvement in the mechanical characteristics of the alloys, in comparison with the alloys in the coarse-grained (CG) or small-grained (SG) states. At the same time, although the formation of the UFG structure leads to a significant increase in the yield strength and tensile strength of the alloys, their elastic modulus did not change. In terms of biocompatibility, the cultivation of MG-63 osteosarcoma cells on the polished and sandblasted substrates demonstrated high cell viability after 10 days and good cell adhesion to the surface.

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“…In order to further increase the strength, a large number of investigations have applied additional cold working or SPD processes after the ECAP processing on CP Ti (Jia et al, 2001;Stolyarov et al, 2003;Zhu et al, 2003;Sadikova et al, 2005;Latysh et al, 2006;Salimgareeva et al, 2006;Semenova et al, 2008;Valiev et al, 2008). These processes can further refine the grain size/microstructure and/or introduce more dislocations to improve the strength.…”

Section: Ufg/nc Ti In Literaturementioning

confidence: 99%

Mechanical behavior of ultrafine-grained/nanocrystalline titanium synthesized by mechanical milling plus consolidation: Experiments, modeling and simulation

Liu

Khan

Takács

et al. 2015

International Journal of Plasticity

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High quality bulk ultrafine-grained/nanocrystalline titanium samples were prepared through room temperature mechanical milling and conventional consolidation processes. The prepared bulk samples showed high purity, very low porosity and high ductility under compression. The dependency of yield stress and post-yielding behavior on grain size, strain rate and temperature were comprehensively studied. The texture evolution of the ufg/nc samples under compression was measured by synchrotron XRD. On the macroscopic scale, the viscoplastic phenomenological Khan-Liang-Farrokh (KLF) model was used to correlate the experimental results of the ufg/nc Ti.

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Mechanical behavior of ultrafine-grained titanium rods obtained using severe plastic deformation

Cited by 12 publications

References 5 publications

In vitro and in vivo studies on nanocrystalline Ti fabricated by equal channel angular pressing with microcrystalline CP Ti as control

In vitro and in vivo studies on nanocrystalline Ti fabricated by equal channel angular pressing with microcrystalline CP Ti as control

Development of Ultrafine–Grained and Nanostructured Bioinert Alloys Based on Titanium, Zirconium and Niobium and Their Microstructure, Mechanical and Biological Properties

Mechanical behavior of ultrafine-grained/nanocrystalline titanium synthesized by mechanical milling plus consolidation: Experiments, modeling and simulation

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