Microstructural response and grain refinement mechanism of commercially pure titanium subjected to multiple laser shock peening impacts

Lu, Jinzhong; Wu, Lin; Sun, Gui Fang; Zhang, Y.K.; Cai, Jie; Cui, C.Y.; X, Luo

doi:10.1016/j.actamat.2017.01.050

Cited by 296 publications

(63 citation statements)

References 40 publications

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“…Mechanical properties and corrosion resistance of permanent implants, such as commercial pure Ti can also be improved using bulk modification. Indeed, compared to Co-Cr implants, Ti displays relatively low strength and micro-hardness, and higher susceptibility to wear corrosion [ 3 ]. Surface treatment techniques are often used to cause severe plastic deformation at a high strain rate in order to refine grain size near the surface and induce certain microstructural features, e.g., micro-twin grating, micro-twin collision in the compression deformation zone, layered slip band in the tension deformation zone and inverse transformation martensite [ 3 ].…”

Section: Limitations Of Biomaterials and Strategies For Enhancemenmentioning

confidence: 99%

“…Indeed, the biomaterial market was valued at $94.1 billion USD in 2012 and is currently worth $134.3 billion USD in 2017 [ 1 ]. The diversity and functionality of available biomaterials, as well as the methods for their processing and assembly into an implantable device, have also experienced substantial growth, with a wide variety of synthetic, natural and hybrid materials currently on the market [ 2 , 3 , 4 , 5 ]. Such diversity allows for better selection of the material to meet the specific objectives of the treatment, such as using metals with have high electro conductivity as electrodes in artificial organs, chemically inert materials for permanent replacement of lost function, or biodegradable materials as a temporary framework for cases where regeneration of lost tissue or function is possible [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Metallic Biomaterials: Current Challenges and Opportunities

et al. 2017

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Metallic biomaterials are engineered systems designed to provide internal support to biological tissues and they are being used largely in joint replacements, dental implants, orthopaedic fixations and stents. Higher biomaterial usage is associated with an increased incidence of implant-related complications due to poor implant integration, inflammation, mechanical instability, necrosis and infections, and associated prolonged patient care, pain and loss of function. In this review, we will briefly explore major representatives of metallic biomaterials along with the key existing and emerging strategies for surface and bulk modification used to improve biointegration, mechanical strength and flexibility of biometals, and discuss their compatibility with the concept of 3D printing.

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Section: Limitations Of Biomaterials and Strategies For Enhancemenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metallic Biomaterials: Current Challenges and Opportunities

et al. 2017

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“…It is widely accepted that the laser-induced CRS plays a significant part in the improvement of mechanical properties of metallic alloys after laser peening [38][39][40]. Laser peening without protective coating can relieve the CRS or even introduce the tensile stress on the surface due to the local melting [19].…”

Section: Residual Stressmentioning

confidence: 99%

“…mechanical properties of metallic alloys after laser peening[38][39][40]. Laser peening without protective…”

mentioning

confidence: 99%

Investigations into the Improvement of the Mechanical Properties of Ti-5Al-4Mo-4Cr-2Sn-2Zr Titanium Alloy by Using Low Energy Laser Peening without Coating

Xue

Jiao

et al. 2020

Materials

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Mechanical properties, such as residual stress, micro-hardness and fatigue performance, of the Ti-5Al-4Mo-4Cr-2Sn-2Zr titanium alloy were improved via the laser peening without coating (LPwC) with a water-penetrable wavelength of 532 nm and pulse duration of 10 ns. In this paper, three kinds of laser energy, namely 85, 110 and 160 mJ were used to process the samples. The titanium alloy samples were also peened with different impact times (1, 3 or 5 impacts) at the energy of 85 mJ. The micro-hardness and residual stress distribution results provided that LPwC can introduce compressive residual stress (CRS) and also induce hardening of the target materials. Further, micro-hardness and CRS showed the increasing trends when the laser impact times increased. However, the CRS and micro-hardness decreased while the laser energy increased from 110 to 160 mJ, which was attributed to the dynamic equilibrium between the thermal and mechanical effects of LPwC. High cycle fatigue strength of the titanium alloy was significantly improved from 360 to 490.3 MPa after three impacts LPwC. The strengthening mechanism of fatigue strength subjected to LPwC was a combined effect between the laser-induced CRS and the high-density dislocations. 101The LPwC experiment was conducted by a Q-switched Nd:YAG laser with a water-penetrable 102 wavelength of 532 nm (Mianna Q series) which operates at 3 Hz and it can supply an maximum pulse 103 energy of 0.8 J. The full duration half maximum (FWHM) of the laser is 10 ns and it can generate the 104 pulsed laser with the spot size of 400 μm. Multiple pulses (1, 3, 5) and a range of laser energies (85 105 mJ, 110 mJ, 160 mJ) were used, and the effect of the variation of these parameters on the mechanical 106 properties change has been investigated. The detailed laser parameters are shown in Table 2. During 107 the laser processing, the specimens were immersed in the water tank, in which the distance between 108 the surface of the specimen and water surface is about 1-2 mm. In addition, the specimen was fixed 109 on the X-Y two axis translation platform and move in a zigzag scan type (as shown in Figure 1). It 110 can be seen from Figure 3 (Schematic diagram of LPwC experimental setup) that the operation of the 111 platform and the laser were controlled by the PC via a self-programmed software.101 The LPwC experiment was conducted by a Q-switched Nd:YAG laser with a water-penetrable 102 wavelength of 532 nm (Mianna Q series) which operates at 3 Hz and it can supply an maximum pulse 103 energy of 0.8 J. The full duration half maximum (FWHM) of the laser is 10 ns and it can generate the 104 pulsed laser with the spot size of 400 μm. Multiple pulses (1, 3, 5) and a range of laser energies (85 105 mJ, 110 mJ, 160 mJ) were used, and the effect of the variation of these parameters on the mechanical 106 properties change has been investigated. The detailed laser parameters are shown in Table 2. During 107 the laser processing, the specimens were immersed in the water tank, in which the distance between 108...

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“…Yet, the LSP has been widely used in advanced manufacturing. For instance, the LSP is employed in surface treatments for Ti alloys [6], magnesium alloys [7], aluminium alloys [8], coppers alloy [9], austenitic stainless steel [10] and carbon steel [11], etc. Despite these progresses, only microstructure response and properties change of the single-phased materials have been revealed under LSP super-high strain rate deformation.…”

Section: Introductionmentioning

confidence: 99%

Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel

Xiong

et al. 2018

J. Iron Steel Res. Int.

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Multiple laser shocking processing (LSP) impacts on microstructures and mechanical properties were investigated through morphological determinations and hardness testing. Microscopic results show that without equal channel angular pressing (ECAP), the LSP treated lamellar pearlite was transferred to irregular ferrite matrix and incompletely broken cementite particles. With the ECAP, the LSP leads to refinements of the equiaxed ferritic grain in ultrafine-grained microduplex structure from 400 nm to 150 nm, and the completely spheroidized cementite particles from 150 nm to 100 nm. Consequentially, enhancements of mechanical properties were found in strength, microhardness and elongations of samples consisting of lamellar pearlite and ultrafine-grained microduplex structure. After the LSP, a mixture of quasi-cleavage and ductile fracture was formed, different from the typical quasi-cleavage fracture from the original lamellar pearlite, and the ductile fracture of the microduplex structure.

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Microstructural response and grain refinement mechanism of commercially pure titanium subjected to multiple laser shock peening impacts

Cited by 296 publications

References 40 publications

Metallic Biomaterials: Current Challenges and Opportunities

Metallic Biomaterials: Current Challenges and Opportunities

Investigations into the Improvement of the Mechanical Properties of Ti-5Al-4Mo-4Cr-2Sn-2Zr Titanium Alloy by Using Low Energy Laser Peening without Coating

Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel

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