Microstructure evolution and grain refinement of Ti-6Al-4V alloy by laser shock processing

Ren, Xudong; Zhou, Wangfan; Liu, F.F.; Ren, Yunpeng; Yuan, Shuxia; Ren, Na; Xu, Suqiang; Yang, Tiankui

doi:10.1016/j.apsusc.2015.11.192

Cited by 113 publications

(21 citation statements)

References 27 publications

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“…During wear, the simultaneous effects of these two deformation mechanisms (i.e., deformation twin and dislocation slip modes) could generate dislocation walls by intersections between twins and dislocations [36]. The dislocation walls divide the grain into several sub-grains and result in submicron and nano-scaled grains [45] as shown in Fig. 9b.…”

Section: Plastic Deformation Of the Subsurface Of Wear Tracksmentioning

confidence: 99%

Mechanism of tribofilm formation on Ti6Al4V oxygen diffusion layer in a simulated body fluid

Yazdi

Ghasemi

Abedini

et al. 2018

Journal of the Mechanical Behavior of Biomedical Materials

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An Oxygen Diffusion Layer (ODL) was generated on the surface of Ti6Al4V alloy by thermal oxidation treatment. In vitro tests for cytotoxicity were performed in the presence of Ti6Al4V and the ODL samples with the culture of G292 Cells using MTT assay. The results showed a similar cell viability in the presence of the both samples. Wear behaviour of Ti6Al4V and the ODL samples was investigated in a phosphate buffered saline solution under a normal load of 30N at a sliding velocity of 0.1m/s. The worn surface and subsurface of the samples were studied using SEM, STEM, TEM, XPS, AFM, nano-hardness and surface profilometry. A bio-tribofilm was observed on the worn surface of the ODL. TEM studies showed that the tribofilm had an amorphous structure and contained oxygen and phosphorous as confirmed by XPS and EDS analysis. AFM images also revealed that the tribofilm consisted of compacted fine debris. The formation of the tribofilm on the ODL with higher hardness and strength resulted in a decrease of about 95% in the wear rate compared with Ti6Al4V alloy.

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Section: Plastic Deformation Of the Subsurface Of Wear Tracksmentioning

confidence: 99%

Mechanism of tribofilm formation on Ti6Al4V oxygen diffusion layer in a simulated body fluid

Yazdi

Ghasemi

Abedini

et al. 2018

Journal of the Mechanical Behavior of Biomedical Materials

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“…It owns a typical combination of mechanical, physical and corrosion resistance properties, leading to its aggressive usage as a structural biomedical implant. Ren et al [9] pointed out that poor fatigue resistance of titanium alloys leads to fatigue failure in biomedical implants. Magnissalis et al [10] did investigations on the failure mechanism of two Ti-alloys HIP femoral stems.…”

Section: Introductionmentioning

confidence: 99%

Impact of Cryogenic Treatment on HCF and FCP Performance of β-Solution Treated Ti-6Al-4V ELI Biomaterial

et al. 2020

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The poor fatigue strength of Ti-6Al-4V ELI is a main cause of failure in structural implants. In this work, Ti-6Al-4V ELI was subjected to β-solution treatment to obtain martensite microstructure and further subjected to −196 °C for 24 h. Significant improvement in high cycle fatigue performance of martensite Ti-6Al-4V ELI was observed on exposure to cryogenic cycle. Resistance to fatigue crack growth of alloy was augmented in martensite structure as compared with mill annealed sample and the same was retained even after exposure to cryogenic treatment. The variation observed in fatigue behavior due to cryogenic treatment was correlated with fractography and metallurgical investigations. Improvement in high cycle fatigue performance can be attributed to a combined effect of a decrease in the size of prior β grain, formation of massive α patch and its subsequent transformation into ultra-fine α and β during the soaking period at −196 °C.

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“…Compared with other surface treatment technologies, laser shock peening (LSP) have the remarkable advantages of not requiring contact with the substrate, of affecting a deep layer, and of having an excellent controllability, which makes LSP very suitable for complex structures, for example, aero-engine blades [ 11 , 12 , 13 ]. Similar to conventional shot peening, LSP is capable of refining grains and producing a surface nanostructured layer [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. Recently, LSP has been used on the aero-engine components to improve the high cycle fatigue performance and to induce surface nanocrystallization of stainless steels [ 18 , 19 ], titanium alloys [ 20 , 21 , 22 ], and nickel-based superalloys [ 23 , 24 ] has been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Similar to conventional shot peening, LSP is capable of refining grains and producing a surface nanostructured layer [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. Recently, LSP has been used on the aero-engine components to improve the high cycle fatigue performance and to induce surface nanocrystallization of stainless steels [ 18 , 19 ], titanium alloys [ 20 , 21 , 22 ], and nickel-based superalloys [ 23 , 24 ] has been reported. Lu et al [ 14 , 15 , 16 ] discussed, in detail, the mechanism of grain refinement induced by LSP on LY2 aluminum alloy, AISI 304 stainless steel, and commercially pure titanium.…”

Section: Introductionmentioning

confidence: 99%

Surface Nanocrystallization and Amorphization of Dual-Phase TC11 Titanium Alloys under Laser Induced Ultrahigh Strain-Rate Plastic Deformation

et al. 2018

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As an innovative surface technology for ultrahigh strain-rate plastic deformation, laser shock peening (LSP) was applied to the dual-phase TC11 titanium alloy to fabricate an amorphous and nanocrystalline surface layer at room temperature. X-ray diffraction, transmission electron microscopy, and high-resolution transmission electron microscopy (HRTEM) were used to investigate the microstructural evolution, and the deformation mechanism was discussed. The results showed that a surface nanostructured surface layer was synthesized after LSP treatment with adequate laser parameters. Simultaneously, the behavior of dislocations was also studied for different laser parameters. The rapid slipping, accumulation, annihilation, and rearrangement of dislocations under the laser-induced shock waves contributed greatly to the surface nanocrystallization. In addition, a 10 nm-thick amorphous structure layer was found through HRTEM in the top surface and the formation mechanism was attributed to the local temperature rising to the melting point, followed by its subsequent fast cooling.

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Microstructure evolution and grain refinement of Ti-6Al-4V alloy by laser shock processing

Cited by 113 publications

References 27 publications

Mechanism of tribofilm formation on Ti6Al4V oxygen diffusion layer in a simulated body fluid

Mechanism of tribofilm formation on Ti6Al4V oxygen diffusion layer in a simulated body fluid

Impact of Cryogenic Treatment on HCF and FCP Performance of β-Solution Treated Ti-6Al-4V ELI Biomaterial

Surface Nanocrystallization and Amorphization of Dual-Phase TC11 Titanium Alloys under Laser Induced Ultrahigh Strain-Rate Plastic Deformation

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