Effect study and application to improve high cycle fatigue resistance of TC11 titanium alloy by laser shock peening with multiple impacts

Nie, Xiangfan; He, Weifeng; Zang, Shun-lai; Wang, Xuede; Zhao, Jie

doi:10.1016/j.surfcoat.2014.05.015

Cited by 124 publications

(30 citation statements)

References 38 publications

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“…Numerous attempts have been performed to study the beneficial effects referring to mechanical properties brought by LSP. Experimentally, prominent property improvements introduced by LSP, which relating to tensile, fatigue, corrosion, fretting and so on, were observed on many metallic materials, such as Al [4,5], Ti [6][7][8], stainless steel [9][10][11]. Nevertheless, the application of LSP on superalloys is rarely reported till now, especially for single crystal superalloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

Liu

Qiao

et al. 2017

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

Liu

Qiao

et al. 2017

Materials Science and Engineering: A

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“…Nie et al investigated the influence on high cycle fatigue resistance of laser shock peening (LSP) for the compressor blade made of TC11 titanium alloy. The relationship between fatigue characteristics and effects on residual stress and microstructural changes was established to reveal the strengthening mechanism of LSP [19]. Hennig et al used the shot peening method with steel media in aerofoil, fillet, and annulus to introduce compressive residual stresses to increase the high cycle fatigue.…”

Section: Experimental Materialsmentioning

confidence: 99%

Study on the Surface Integrity of a Thin-Walled Aluminum Alloy Structure after a Bilateral Slid Rolling Process

Sun

Han

et al. 2016

Metals

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Abstract:For studying the influence of a bilateral slid rolling process (BSRP) on the surface integrity of a thin-walled aluminum alloy structure, and revealing the generation mechanism of residual stresses, a self-designed BSRP appliance was used to conduct rolling experiments. With the aid of a surface optical profiler, an X-ray stress analyzer, and a scanning electron microscope (SEM), the differences in surface integrity before and after BSRP were explored. The internal changing mechanism of physical as well as mechanical properties was probed. The results show that surface roughness (Ra) is reduced by 23.7%, microhardness is increased by 21.6%, and the depth of the hardening layer is about 100 µm. Serious plastic deformation was observed within the subsurface of the rolled region. The residual stress distributions along the depth of the rolling surface and milling surface were tested respectively. Residual stresses with deep and high amplitudes were generated via the BSRP. Based on the analysis of the microstructure, the generation mechanism of the residual stresses was probed. The residual stress of the rolling area consisted of two sections: microscopic stresses caused by local plastic deformation and macroscopic stresses caused by overall non-uniform deformation.

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“…Accordingly, it is of great importance to enhance the surface properties of these components. In the past several decades, several traditional and novel surface treatment techniques, like shot peening (SP) [7,8], surface mechanical attribution treatment (SMAT) [9] and also laser shock peening (LSP) [10,11], have been successfully used to enhance the surface mechanical properties and refine the microstructures to improve the fatigue performance of the metallic components. Owing to the high flexibility and non-contact features of the laser, laser shock peening has evolved as a better tool to enhance the fatigue performance of the titanium alloys [12][13][14].…”

Section: Introductionmentioning

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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Effect study and application to improve high cycle fatigue resistance of TC11 titanium alloy by laser shock peening with multiple impacts

Cited by 124 publications

References 38 publications

Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

Study on the Surface Integrity of a Thin-Walled Aluminum Alloy Structure after a Bilateral Slid Rolling Process

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

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