High-cycle bending fatigue behavior of TC6 titanium alloy subjected to laser shock peening assisted by cryogenic temperature

Li, Jing; Zhou, Jing; Liu, Lin; Feng, Aixin; Huang, Shu; Meng, Xiankai

doi:10.1016/j.surfcoat.2021.126848

Cited by 29 publications

(7 citation statements)

References 40 publications

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“…Li et al, [111] in a study of CLSP for a titanium alloy, demonstrated that CLSP resulted in higher defect density and more twins, which resulted in much higher surface nanohardness (12.86 GPa, a 30.96% increase as compared with LSP at room temperature) and better bending fatigue performance.…”

Section: Cryogenic Laser Shock Peeningmentioning

confidence: 99%

“…[ 110 ] The dense dislocations, deformation twins, and deformation‐induced martensites induced in samples treated by CLSP lead to better mechanical properties, such as hardness, yield strength, and fatigue performance for these samples than for samples treated by room‐temperature LSP. Li et al, [ 111 ] in a study of CLSP for a titanium alloy, demonstrated that CLSP resulted in higher defect density and more twins, which resulted in much higher surface nanohardness (12.86 GPa, a 30.96% increase as compared with LSP at room temperature) and better bending fatigue performance.…”

Section: Recent Developments In Lspmentioning

confidence: 99%

See 1 more Smart Citation

Recent Developments and Novel Applications of Laser Shock Peening: A Review

2021

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Wear, corrosion, and fatigue are responsible for more than 80% of the failures of metallic materials. As most failures caused by wear, corrosion, and fatigue initiate from the material surface, surface integrity has a crucial impact on the overall performance of the materials. Surface integrity characteristics, including hardness, microstructure, morphology, roughness, and residual stress status, can significantly affect the wear and corrosion behavior. By improving hardness and introducing beneficial compressive residual stresses in the near-surface region, laser shock peening (LSP) can significantly improve the fatigue performance of metallic materials. In the LSP process, light from a high-energy pulsed laser penetrates through the transparent confinement media and irradiates the ablative coating, quickly heating the affected area to a high temperature and generating high-pressure plasma. The expansion of the plasma causes a shockwave that can plastically deform the target metals, resulting in work hardening and compressive residual stresses. Compared with shot peening (SP), LSP has the following advantages. 1) LSP can produce deeper layers of compressive residual stresses; 2) the process parameters in LSP can be precisely controlled; 3) the surface integrity of the parts after LSP is improved without the need for postprocessing; 4) LSP can be used to treat components with complex geometry; and 5) LSP has a high processing efficiency and makes for a clean working environment. Because LSP represents a new generation of surface strengthening technology that can replace SP, it has gained wide attention. Askar'yan and Moroz measured the pressures exerted by a high-intensity laser beam on the surface of a metal target [1] and found that this pressure is sufficient for steering space vehicles. However, the experiments were conducted under vacuum conditions to prevent dielectric breakdown, and such conditions are not practical for use in industry. [2] Anderholm at Sandia Laboratories irradiated an aluminum film covered in quartz with a laser beam and found that the presence of a transparent confinement layer can significantly increase the shock pressure. [3] Although this experiment was also conducted in vacuum, it proved that with the presence of a transparent confinement layer, a laser power density that does not cause dielectric breakdown in air can also generate a sufficiently large shock pressure. This observation is of great significance for the later industrial applications that involve laser-generated shockwaves.Fairand et al. at Battelle Memorial Institute changed the microstructure of 7075 aluminum alloy through short-pulse, laser-induced shockwaves with a high power density, and they found that after processing, the stress corrosion cracking (SCC) resistance and fatigue performance of the alloy improved. [4] This is a key event in the development of LSP; after this study, the National Science Foundation of the United States began to support the investigation of LSP. Clauer et al. [5] changed the intensity ...

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Section: Cryogenic Laser Shock Peeningmentioning

confidence: 99%

Section: Recent Developments In Lspmentioning

confidence: 99%

Recent Developments and Novel Applications of Laser Shock Peening: A Review

2021

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“…Similar to WLSP, LSP can be performed at cryogenic temperature in the liquid nitrogen atmosphere called CLSP. Li et al [ 133 ] conducted CLSP experiments on TC6 alloy and explained that CLSP treatment leads to an increase in dislocation density, deformation twins, and surface RCS, improving high cycle bending fatigue strength.…”

Section: Peening Techniquesmentioning

confidence: 99%

Peening Techniques for Surface Modification: Processes, Properties, and Applications

et al. 2021

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Surface modification methods have been applied to metals and alloys to change the surface integrity, obtain superior mechanical properties, and improve service life irrespective of the field of application. In this review paper, current state-of-the-art of peening techniques are demonstrated. More specifically, classical and advanced shot peening (SP), ultrasonic impact peening (UIP), and laser shock peening (LSP) have been discussed. The effect of these techniques on mechanical properties, such as hardness, wear resistance, fatigue life, surface roughness, and corrosion resistance of various metals and alloys, are discussed. This study also reports the comparisons, advantages, challenges, and potential applications of these processes.

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“…Therefore, further investigation can be conducted on the influence of temperature on other machining damages. Moreover, scholars have revealed that temperature also has a certain effect on the processing behavior of Ti 17,18 . The above researches have proved that temperature is an important factor affecting the machining damage of stacks, and it is necessary to further explore the relationship between the temperature of the processing area and the quality of drilling of stacks.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the heat effect on the drilling damage of Ti/CFRP stacks

Chen,

Zhao,

Wang

et al. 2024

Polymer Composites

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Carbon fiber reinforced plastics (CFRP) has strong sensitivity to temperature, as the stacking sequence is titanium alloy (Ti) to CFRP, the damage of CFRP is more severe due to the accumulation of cutting heat. In this study, a stress‐strain constitutive model of CFRP with the effect of thermal stress is proposed. On the basis, a simulation model of drilling Ti/CFRP stacks is established to explore the heat effect on the drilling damage. Based on the results, it can be concluded that the burr of Ti at hole exit is generally low due to the support of CFRP, and the burr height increases by 56.61% as the temperature rises from 182.02 to 355.69 °C. Besides, the intralaminar damage of CFRP is mainly caused by the fiber tensile failure and matrix tensile failure, and the matrix tensile failure is more affected by temperature. Moreover, delamination of CFRP decreases slightly with the reduce of drilling temperature. In addition, serious damage of CFRP on the hole wall usually occurs within the cutting angle of 90° to 135°, and pit defects can be reduced in a lower drilling temperature.Highlights A thermal effect stress‐strain constitutive model of CFRP is proposed. Ti/CFRP drilling model is developed based on the proposed constitutive model. Fiber and matrix tensile failure are main form of intralaminar damage of CFRP. Matrix tensile failure is more sensitive to temperature.

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High-cycle bending fatigue behavior of TC6 titanium alloy subjected to laser shock peening assisted by cryogenic temperature

Cited by 29 publications

References 40 publications

Recent Developments and Novel Applications of Laser Shock Peening: A Review

Recent Developments and Novel Applications of Laser Shock Peening: A Review

Peening Techniques for Surface Modification: Processes, Properties, and Applications

Numerical study on the heat effect on the drilling damage of Ti/CFRP stacks

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