Enhanced Fatigue Properties of Ultrafine-Grained Titanium Rods Produced Using Severe Plastic Deformation

Semenova, Irina P.; Salimgareeva, Gulnaz; Латыш, В. В.; Valiev, Ruslan Z.

doi:10.4028/www.scientific.net/ssp.140.167

Cited by 6 publications

(3 citation statements)

References 6 publications

(11 reference statements)

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“…Rather, they have been developed for different purposes, and therefore their joint applications can yield a synergistic effect for achieving a beneficial combination of properties. By integrating warm ECAP and cold working, the residual ductility after ECAP can be 'converted' into strength via further grain refinement and/or dislocation hardening, as has been successfully demonstrated for Ti [20]. Particularly, for deformation processing of rods, rotary swaging (RS) is a well-established and promising deformation technique, which belongs to a family of radial hammer forging processes for axisymmetric rods [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

High Performance Fine-Grained Biodegradable Mg-Zn-Ca Alloys Processed by Severe Plastic Deformation

Vinogradov

Васильев

Копылов

et al. 2019

Metals

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The tensile strength, fatigue, and corrosion fatigue performance of the magnesium alloy ZX40 benefit strongly from hybrid deformation processing involving warm equal-channel angular pressing (ECAP) at the first step and room temperature rotary swaging at the second. The general corrosion resistance improved as well, though to a lesser extent. The observed strengthening is associated with a combined effect of substantial microstructure refinement down to the nanoscale, reducing deformation twinning activity, dislocation accumulation, and texture transformation. The ultimate tensile strength and the endurance limit in the ultrafine-grained material reached or exceeded 380 and 120 MPa, respectively, which are remarkable values for this nominally low strength alloy.

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Section: Introductionmentioning

confidence: 99%

High Performance Fine-Grained Biodegradable Mg-Zn-Ca Alloys Processed by Severe Plastic Deformation

Vinogradov

Васильев

Копылов

et al. 2019

Metals

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“…23,24,27,28 Too limited investigations have been conducted on fatigue behavior of UFG/NC CP-Ti produced by cold/warm/hot ECAP and most studies have been focused on CP-Ti imposed by warm/hot ECAP. 13,27,29–33 The research’s results have demonstrated however pressing at high temperatures is easier, but optimum UFG microstructures it will be obtained when cold-working was performed at lowest possible temperature (like room temperature, RT) from this aspect that there are not any appreciable cracks on work-piece. By keeping pressing temperature low, it will be assured that all effective factors for improving properties of metals like “minimum of average grain size”, “increasing density of dislocations” and “the highest percentage of high angle grain boundaries (HAGBs)” are obtained.…”

Section: Introductionmentioning

confidence: 99%

Corrosion-fatigue resistance of ultrafine grain commercially pure titanium in simulated body fluid

Naseri

Hiradfar

Shariati

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Commercially pure titanium (CP-Ti) due to excellent biocompatibility and high specific strength is known as a metallic biomaterial and is widely utilized in medical applications as implant material. Because of low strength of CP-Ti as compared to other bio-metals, it has been proved in literatures that applying equal channel angular pressing (ECAP) process can be useful to enhancement of mechanical and metallurgical properties of CP-Ti by improvement of initial microstructure to ultrafine grained (UFG). Implant in human body is attacked from cyclic fatigue loads and corrosion, simultaneous. Hence, aim of this study is examination of corrosion-fatigue resistance of CP-Ti before and after introducing ECAP in simulated body fluid (SBF) as a saline solution close to blood plasma. In this study, multi-pass ECAP is conducted on CP-Ti at room temperature and then the axial fatigue test is performed in SBF environment with temperature 37 °C. The comparison of stress-cycle curves demonstrated that corrosion-fatigue resistance of ECAPed CP-Ti is extremely higher than initial annealed one. Moreover, it was observed that by increasing the pass number of ECAP, corrosion-fatigue resistance improves significantly. Furthermore, these results are compared to fatigue behavior of CP-Ti in air environment. The results show that corrosion-fatigue resistance of unECAPed and ECAPed CP-Ti in SBF is slightly lower than fatigue ones in air. According to the results of this experimental research, it is concluded that UFG CP-Ti has an awesome corrosion-fatigue resistance in human body and it is very suitable for utilizing as material of implants.

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“…A beneficial combination of properties can be often achieved through a combination of different processing routes. For example, by combing warm (or hot) ECAP and cold working, the residual ductility after ECAP can be "converted" into strength via further grain refinement and / or dislocation hardening [13]. Particularly, for deformation processing of rods, rotary swaging (RS) [14] is a well-received technique, which has been proven effective for grain refinement and strength improvement of Mg and its AZ31 alloy [15,16].…”

Section: Introductionmentioning

confidence: 99%

High strength and fatigue properties of Mg-Zn-Ca alloys after severe plastic deformation

et al. 2019

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Magnesium alloys are the lightest metallic structural materials with an outstanding specific strength. This makes them appealing for a wide range of applications in "green" transportation where weight saving is of major concern. Another emerging application area for modern Mg-based alloys is in the biomedical domain where they are considered as bioabsorbable temporary implants, and where the worldwide market is expanding particularly rapidly in parallel with the surging research. Requirements for mechanical properties-strength, ductility and fatigue resistance-of implants in orthopaedics are stringent. Therefore, a broad variety of processing routes have been proposed in the past decade to tailor the microstructure in order to optimize the properties. In the present brief communication, we demonstrate that using a hybrid deformation processing schedule involving warm equal-channel angular pressing (ECAP) on the first stage and cold rotary swaging on the second dramatically improves the tensile and fatigue properties of the magnesium alloy ZX40. Due to a combined effect of significant grain refinement and dislocation storage after rotary swaging, the ultimate tensile strength and the conventional fatigue limit achieved very high values (for this class of alloys) of 380 MPa and 115 MPa, respectively. Preliminary results of the microstructural investigations are discussed briefly.

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Enhanced Fatigue Properties of Ultrafine-Grained Titanium Rods Produced Using Severe Plastic Deformation

Cited by 6 publications

References 6 publications

High Performance Fine-Grained Biodegradable Mg-Zn-Ca Alloys Processed by Severe Plastic Deformation

High Performance Fine-Grained Biodegradable Mg-Zn-Ca Alloys Processed by Severe Plastic Deformation

Corrosion-fatigue resistance of ultrafine grain commercially pure titanium in simulated body fluid

High strength and fatigue properties of Mg-Zn-Ca alloys after severe plastic deformation

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