Microstructure, texture evolution and mechanical properties of pure Ti by friction stir processing with slow rotation speed

Jiang, Luyao; Huang, Weijiu; Liu, Chenglong; Chai, Linjiang; Yang, Xusheng; Xu, Qiaoliang

doi:10.1016/j.matchar.2018.12.006

Cited by 33 publications

(25 citation statements)

References 34 publications

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“…Titanium and its alloys are known for their high specific strength, high heat resistance, and high resistance to erosion and corrosion [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Friction Stir Processing (FSP) was derived from friction stir welding (FSW) in 2000 and was first reported by Mishra et al [15].…”

Section: Introductionmentioning

confidence: 99%

On Dynamic Recrystallization During Friction Stir Processing of Commercially Pure Ti and Its Influence on the Microstructure and the Mechanical Properties

Regev,

Spigarelli

2024

Preprint

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Friction stir processing (FSP), a severe plastic deformation process, was applied on commercially pure Ti to obtain an improved microstructure. The process yielded a refined microstructure and higher mechanical properties at room temperature (RT). Yet the microstructure was found to contain bright bands demonstrating high hardness values of about 500 HV. High resolution scanning electron microscopy (HRSEM) as well as electron back scattering diffraction (EBSD) analysis indicated that these bands were composed of extra-fine equiaxed α-Ti grains with an average radius of 1-2 microns. In addition, a retained β-phase was detected at the boundaries of these α-Ti grains, together with a small quantity of separate β grains. The results of a fractography study conducted on broken tensile specimens showed that the FSP’ed material was free of defects and that the fracture started at these bands. It is proposed that these bright bands are due to excessive deformation occurring during the processing stage, leading to an accelerated dynamic recrystallization (DRX) process. In turn, these heavy deformation regions act as a strengthening constituent, making the material superior to the parent material as far as its mechanical RT properties are concerned. Consequently, this means that FSP of CP-Ti has the potential to serve as an industrial means of improving the mechanical properties of the material.

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Section: Introductionmentioning

confidence: 99%

On Dynamic Recrystallization During Friction Stir Processing of Commercially Pure Ti and Its Influence on the Microstructure and the Mechanical Properties

Regev,

Spigarelli

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The effects of FSP on the microstructure and mechanical properties [11][12][13][14], corrosion/electrochemical behaviour [14][15][16][17], and wear properties [17,18] of CP-Ti have been investigated. According to previous investigations, FSP can significantly improve the surface properties of CP-Ti by promoting the formation of ultrafine grains and increasing the density of dislocations and volume fraction of Widmanstätten structure [15,16,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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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“…Also, the plate is moved around the tool from front to back. Previously, FSP technology has been extensively studied to enhance the mechanical properties of titanium alloys, 13,14 copper alloys, 15,16 aluminum alloys, 17,18 and steel. 19,20 Apart from these materials, limited study has been performed on FSP of magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

The effect of friction stir process on the mechanical, tribological, and biocompatibility properties of AZ31B magnesium alloy as a biomaterial: A pilot study

Asl

Çelik-Uzuner

Uzuner

et al. 2022

Proc Inst Mech Eng H

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Recently, AZ31B magnesium alloy has been widely employed in automotive, aerospace, and bio implant industries due to its light-weight and biocompatibility properties. However, the equilibrium of ductility and strength of this material and the negativity brought by its poor wear behavior have limited its versatile use. Friction stir processing (FSP) has been commonly used as severe plastic deformation method for improving mechanical and tribological properties of metal sheets. The effect of this method on the biocompatibility of materials is a matter of curiosity that should be emphasized. So, the present study aims to investigate the effect of friction stir process on the mechanical, tribological, and biocompatibility properties of AZ31B magnesium alloy. It is observed that FSP enhanced the tensile properties of the alloy but decreased its elongation. It was determined that the base material exhibited ductile character on the fracture surface of the specimens, and mixed ductile/brittle fracture was evident with the FSP. In the FSP zone, the hardness value was improved by 17% compared to the base material. Also, the wear performance of the alloy enhanced in ambient air and Simulated Body Fluid (SBF) solution. Wear properties in SBF solution were better due to less adhesive bonds between the friction surfaces. This assessment was supported by SEM images of the wear path and surface of counter bodies. On the other hand, FSPed AZ31B alloy materials with improved strength properties were not cytotoxic for human gingival fibroblasts, and these results may suggest that the materials are safe for clinical uses.

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Microstructure, texture evolution and mechanical properties of pure Ti by friction stir processing with slow rotation speed

Cited by 33 publications

References 34 publications

On Dynamic Recrystallization During Friction Stir Processing of Commercially Pure Ti and Its Influence on the Microstructure and the Mechanical Properties

On Dynamic Recrystallization During Friction Stir Processing of Commercially Pure Ti and Its Influence on the Microstructure and the Mechanical Properties

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

The effect of friction stir process on the mechanical, tribological, and biocompatibility properties of AZ31B magnesium alloy as a biomaterial: A pilot study

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