Effect of laser shock peening on boring hole surface integrity and conformal contact fretting fatigue life of Ti-6Al-4 V alloy

Gu, Hairong; Pei, Yan; Li, Jiao; Chen, Shiqi; Song, Yan-Kui; Zou, Shikun; Wang, Xibin

doi:10.1016/j.ijfatigue.2022.107241

Cited by 20 publications

(3 citation statements)

References 68 publications

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“…LSP treatment has showed evident technical advantages in the fields of surfacestrengthening of aeronautical components and related materials. At present, the associated researches mainly focus on the improvements about the fatigue and residual stress of aeronautical components [24][25][26][27]. However, the researches, especially the associated summaries about wear and corrosion resistance, are rare in relative.…”

Section: Introductionmentioning

confidence: 99%

Improving the Wear and Corrosion Resistance of Aeronautical Component Material by Laser Shock Processing: A Review

Lin

et al. 2023

Materials

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Since the extreme service conditions, the serious failure problems caused by wear and corrosion are often encountered in the service process for aeronautical components. Laser shock processing (LSP) is a novel surface-strengthening technology to modify microstructures and induce beneficial compressive residual stress on the near-surface layer of metallic materials, thereby enhancing mechanical performances. In this work, the fundamental mechanism of LSP was summarized in detail. Several typical cases of applying LSP treatment to improve aeronautical components’ wear and corrosion resistance were introduced. Since the stress effect generated by laser-induced plasma shock waves will lead to the gradient distribution of compressive residual stress, microhardness, and microstruture evolution. Due to the enhancement of microhardness and the introduction of beneficial compressive residual stress by LSP treatment, the wear resistance of aeronautical component materials is evidently improved. In addition, LSP can lead to grain refinement and crystal defect formation, which can increase the hot corrosion resistance of aeronautical component materials. This work will provide significant reference value and guiding significance for researchers to further explore the fundamental mechanism of LSP and the aspects of the aeronautical components’ wear and corrosion resistance extension.

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Section: Introductionmentioning

confidence: 99%

Improving the Wear and Corrosion Resistance of Aeronautical Component Material by Laser Shock Processing: A Review

Lin

et al. 2023

Materials

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“…However, the tribological properties and fatigue resistance of Ti-6Al-4V alloy are relatively low, so it is di cult to meet the long-term performance requirements of key components in complex service environments [4][5][6]. To improve the service life of structural materials, various surface modi cation technologies without changing the matrix material have been applied to Ti alloys such as mechanical shot peening (SP) [7], surface mechanical attrition treatment (SMAT) [8], deep cold rolling (DCR) [9], laser shock peening (LSP) [10], and so on. Compared with other methods, LSP has the advantages of an outstanding strengthening effect, wide application range, strong controllability, and good applicability [11,12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of microstructure and tribological property of Ti-6Al-4V alloy by laser shock peening processing

Gu,

Tian,

Zhao

et al. 2023

Int J Adv Manuf Technol

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Laser shock peening (LSP) is a process to introduce compressive residual stresses for improved surface properties of materials. In this study, the effect of LSP on the microstructure and tribological property of Ti-6Al-4V alloy was investigated. The surface and cross-sectional microstructure of the samples show that the shape of the β phase changes from a long strip to a short bar and granular after the LSP treatment. With the increase of laser energy, the surface roughness decreases gradually while the surface microhardness is increased. The maximum hardness is on the surface, and with the increase of the depth, the hardness decreases until a stable value of 339.4 HV which is the microhardness of the matrix. The thickness of the high-microhardness layer is about 350 μm. LSP treatment can decrease the average friction coe cient and effectively improve the tribological property of Ti-6Al-4V alloy. The higher the laser energy, the better the wear resistance. This study is helpful for further study and applications of the LSP process in improving the tribological property of Ti alloys. Recently, research has been performed in the eld of LSP, mainly focusing on common metal materials such as steel [22], aluminum alloy [23], and titanium alloy [24]. Bai et al. [25] studied the improvement of

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“…The surface strain-strengthening treatment improves the performance of the surface layer of the component through plastic deformation. Plastic deformation at ultra-high strain rates introduces residual compressive stress, grain refinement, and surface hardening [9]. Laser-shock peening (LSP) is a surface strain process that improves the surface properties of components effectively [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carburizing Composite Laser-Shock Processing on Properties and Microstructure of 20CrNiMo Steel

Chen,

Sun,

et al. 2023

Metals

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In the service process of gears, premature fatigue failure or fracture of gears is often caused by poor surface performance. 20CrNiMo steel is a commonly used material for gears. Laser-shock peening (LSP), carburizing treatment (CT), and hybrid modification of carburizing treatment and laser-shock peening (LSP + CT) were carried out to improve the performance of 20CrNiMo steel. The hardness, residual stress, microstructure, subgrain size, and toughness of the samples were analyzed following various modification methods. It was observed that the properties of the composite-modified gradient structure materials achieved through carburizing and laser-shock peening were superior to those modified using single methods. After the composite treatment of carburizing and laser shocking, the samples exhibited the most significant increase in hardness, up to 916HV0.1, with a surface layer experiencing residual compressive stress as low as −635 MPa. Simultaneously, a gradient microstructure was formed on the surface layer, with 80% of the crystallites being in the nanoscale range. Furthermore, the toughness was notably enhanced. Experimental results confirm the improvement in the properties of 20CrNiMo samples, resulting in the creation of a functionally graded material through the composite treatment of carburizing and laser shocking.

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Effect of laser shock peening on boring hole surface integrity and conformal contact fretting fatigue life of Ti-6Al-4 V alloy

Cited by 20 publications

References 68 publications

Improving the Wear and Corrosion Resistance of Aeronautical Component Material by Laser Shock Processing: A Review

Improving the Wear and Corrosion Resistance of Aeronautical Component Material by Laser Shock Processing: A Review

Investigation of microstructure and tribological property of Ti-6Al-4V alloy by laser shock peening processing

Effect of Carburizing Composite Laser-Shock Processing on Properties and Microstructure of 20CrNiMo Steel

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