Tribological Characterization of Commercial Pure Titanium Processed by Multi-Directional Forging

Ansarian, I.; Shaeri, M.H.; Ebrahimi, Mahmoud; Minárik, Peter

doi:10.1007/s40195-019-00877-4

Cited by 18 publications

(3 citation statements)

References 37 publications

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“…According to Figure 11(a), the substantial substrate plastic deformation of the un-processed Ti sample after wearing under the applied load of 20 N has resulted in the formation of large extruded upset visible at the edges of the pin. Therefore, in agreement with the previous studies [18,44,45] severe tribolayer delamination and plastic deformation can be considered as the main wear mechanisms. This is while the occurrence of wear debris between the sliding surfaces can also promote the abrasive wear mechanism.…”

Section: Effect Of Fss On Tribological Propertiessupporting

confidence: 91%

Enhancing the tribological properties of pure Ti by pinless friction surface stirring

Ashoori,

Jafarzadegan,

Taghiabadi

et al. 2023

Materials Science and Technology

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Friction surface stirring (FSS) was employed to enhance the tribological properties of commercially pure Ti (CP-Ti). Applying FSS under the optimised process parameters (i.e. rotation and traverse speeds of 100 rpm and 8 mm/min, respectively) was found to increase the surface hardness of as-received CP-Ti from about 200–630 HV. The sliding wear resistance was therefore increased by 76, 76, and 85% under applied loads of 5, 10, and 20 N, respectively. The average friction coefficient (AFC) of CP-Ti also reduced considerably by the FSS. For instance, the AFC was reduced from 0.67 ± 0.07 and 1.04 ± 0.14 to about 0.33 ± 0.03 and 0.45 ± 0.04 at the applied loads of 5 and 20 N, respectively. The wear and friction mechanisms were also discussed.

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Section: Effect Of Fss On Tribological Propertiessupporting

confidence: 91%

Enhancing the tribological properties of pure Ti by pinless friction surface stirring

Ashoori,

Jafarzadegan,

Taghiabadi

et al. 2023

Materials Science and Technology

Self Cite

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“…It is thus of great interest to improve the mechanical properties of CP titanium, such as ultimate tensile and fatigue strength, to be able to replace the critically discussed titanium alloys in load bearing biomedical applications. [ 4,5 ] The use of severe plastic deformation, multi directional forging, [ 6,7 ] and especially equal channel angular pressing (ECAP) [ 5,8–10 ] to this end offers numerous advantages. ECAP not only allows for rapid treatment of large samples [ 11 ] which can be further processed for biomedical applications, but also results in high dislocation and grain boundary densities of the metallic phase [ 12 ] in CP titanium.…”

Section: Figurementioning

confidence: 99%

Strengthening of Titanium by Equal Channel Angular Pressing ‐ Impact on Oxide Layer Properties of Pure Titanium and Ti6Al4V

Franz

Mingler

Krystian

et al. 2020

Adv Materials Inter

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Equal channel angular pressing (ECAP) as a method applicable to large samples for strengthening metallic materials via severe plastic deformation has recently attracted considerable interest. For biomedical applications, ECAP‐treated pure titanium is a promising alternative for implants subjected to high mechanical loads as it contains no potentially cytotoxic alloying elements. The consequences of an ECAP treatment for the physico‐chemical properties of the air formed passive layers of pure or alloyed titanium, which are of the utmost importance for the biological response to these materials, are studied here for the first time. This includes mechanical, electron microscopic, and electrochemical investigations in protein containing media to study the reactions that occur immediately after implantation in the phase boundary between implant and biological system. The ECAP treatment results in a positive shift of the flatband potential and a particularly strong increase of the donor density for the native oxide layers. This is associated with increased electronic conductivity of the oxide layers under anodic polarization.

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“…Researchers attempted to elevate the strength of CP Ti through the other two strengthening mechanisms, namely dislocation strengthening mechanism and interfacial strengthening mechanism [4][5][6][7][8][9][10]. Severe plastic deformation techniques, for example ECAP (equal-channel angular pressing), HPT (high-pressure torsion), ARB (accumulative roll bonding) and MDF (multi-directional forging), can achieve the above two strengthening effects simultaneously [11].…”

Section: Introductionmentioning

confidence: 99%

Texture Evolution Behavior and Its Triggered Mechanical Anisotropy of CP Ti During Severe Cold Rolling and Subsequent Annealing

Shi

Cao

Fan

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The texture evolution behavior and its triggered mechanical anisotropy of commercially pure titanium (CP Ti) during severe cold rolling and subsequent annealing are discussed based on the optical microscopy and the electron backscattered diffraction analyses. Some enlightening results are found. It is shown that planar textures exist under all treatments, namely the {11-29}<10-10> under rolling state, the {11-27}<10-10> under 300 °C annealing state and the {11-24}<10-10> under 500 °C annealing state. This indicates that the crystal plane indices of planar texture change toward {− 12-10} with increasing annealing temperature, which is a result of crystal lattice rotation. Planar texture triggers anisotropy of the mechanical properties for CP Ti sheets under all treatments. In particular, CP Ti sheets exhibit severe and similar anisotropy behavior under rolling and 300 °C annealing states. Generally speaking, the rolling direction (RD) specimens get relatively low yield strength, high ultimate tensile strength and good plasticity, and RD + 45° specimens show relatively high yield strength, low ultimate tensile strength and good plasticity. The transverse direction specimens, however, usually exhibit high yield strength and low plasticity. It is proved that the above anisotropy behavior is mainly determined by the Schmid factor distribution of the (10-10) [11][12][13][14][15][16][17][18][19][20] prismatic slip system in different directions. Due to the non-negligible influence exerted by the (0001) [11][12][13][14][15][16][17][18][19][20] basal slip system after 500 °C annealing, the anisotropy behavior under this state is obviously different.

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Tribological Characterization of Commercial Pure Titanium Processed by Multi-Directional Forging

Cited by 18 publications

References 37 publications

Enhancing the tribological properties of pure Ti by pinless friction surface stirring

Enhancing the tribological properties of pure Ti by pinless friction surface stirring

Strengthening of Titanium by Equal Channel Angular Pressing ‐ Impact on Oxide Layer Properties of Pure Titanium and Ti6Al4V

Texture Evolution Behavior and Its Triggered Mechanical Anisotropy of CP Ti During Severe Cold Rolling and Subsequent Annealing

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