Numerical Simulation on Residual Stress Field of Flat‐Topped Laser Oblique Shocking of Ni‐Based Alloy GH4169

Qu, Xiangming; Zhang, Yongkang; Liu, Jun

doi:10.1155/2020/8824824

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…Due to the narrow structure of the mortise area of the turbine disk, LSP could only be carried out at oblique incidence, that is, the angle between the laser beam and the normal line on the surface of the site to be impacted was greater than 0°. The range of oblique impact angle of each area was determined by using MotoSim EG CRV offline programming software with a 2 mm beam [16]. The results show that when the angle of 60°was selected as the oblique impact angle, there was no interference in the region to be strengthened of the mortise structure.…”

Section: Objectives and Scopementioning

confidence: 99%

Study on stress relaxation characteristics of FGH95 powder superalloy treated by laser shock peening

Zhu¹,

Cao³

et al. 2022

Mater. Res. Express

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Aiming at the phenomenon that the residual stress induced by Laser Shock Peening (LSP) will relax and redistribute under various loads, temperature, cyclic load, and the dual treatment of temperature and cyclic load on the residual stress relaxation of FGH95 powder superalloy after LSP treatment were studied, and the analysis model of relevant residual stress relaxation was constructed. The purpose is to understand the strengthening effect and stability of the alloy under temperature and cyclic load after LSP treatment. With the increase of treatment temperature, the relaxation of residual stress became more and more obvious. Most of the residual stress relaxation occurred in the first 30 minutes of temperature treatment, then slowed down and stabilized after 1 hour. The residual stress was initially relaxed in the first 50 cycles, remained roughly unchanged between 50 and 5000 cycles. The intensify of the cyclic load increasing, adding material yield level, further plastic deformation and residual stress relaxation rate increases. With the increase of load intensify and load ratio, residual stress relaxation was also increased. The residual stress relaxation rate after 600°C and cyclic load treatment was 56.2%, both greater than that after 600°C or cyclic treatment of 25°C, but less than the sum of the two conditions. The results of this paper provide a reference for the LSP of the FGH95 powder superalloy turbine disk and other aero engine parts.

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Section: Objectives and Scopementioning

confidence: 99%

Study on stress relaxation characteristics of FGH95 powder superalloy treated by laser shock peening

Zhu¹,

Cao³

et al. 2022

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

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Numerical simulations of temperature and stress field of Fe-Mn-Si-Cr-Ni shape memory alloy coating synthesized by laser cladding

Zhang

Zha

et al. 2021

Optik

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Numerical investigation of the effect of oblique laser shock processing parameters on the residual stress and deformation characteristics of TC6 titanium alloy

Liu,

Li,

Wang

et al. 2023

Journal of Laser Applications

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Oblique laser shock processing (OLSP) can provide a new solution for improving the mechanical properties of complex structural elements. In this paper, a spatial distribution model of OLSP shock wave pressure is established and validated to study the residual stress (RS) field and surface morphology of titanium alloy TC6 treated by OLSP using the finite element method. The effects of the incident angle, overlapping rate, and scanning pattern on the RS field and surface morphology were investigated. The OLSP results indicate that the overlapping rate should be at least 50%. The RS field and surface morphology obtained with the interval scanning pattern are more uniform compared to snake and spiral. With a 50% overlapping rate and interval scanning pattern, the surface roughness was found to be 0.16, and the surface residual compressive stress fluctuation amplitude was reduced by 40.07%. The results provide a theoretical basis for complex structures of LSP.

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Numerical Simulation on Residual Stress Field of Flat‐Topped Laser Oblique Shocking of Ni‐Based Alloy GH4169

Cited by 3 publications

References 26 publications

Study on stress relaxation characteristics of FGH95 powder superalloy treated by laser shock peening

Study on stress relaxation characteristics of FGH95 powder superalloy treated by laser shock peening

Numerical simulations of temperature and stress field of Fe-Mn-Si-Cr-Ni shape memory alloy coating synthesized by laser cladding

Numerical investigation of the effect of oblique laser shock processing parameters on the residual stress and deformation characteristics of TC6 titanium alloy

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