Effects of laser-processed unit distribution density on wear resistance of biomimetic 6082 aluminum alloy

Zhao, Guoping; Yuan, Ye; Zhang, Peng; Zang, Chuanlong; Zhang, Jianlong; Tao, Lixi; Zhang, Guohui; Zhou, Hong

doi:10.1016/j.optlastec.2018.11.021

Cited by 18 publications

(2 citation statements)

References 18 publications

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“…The strengthening mechanism of DLSM treatment includes fine-grained strengthening, solid solution strengthening, dislocation strengthening, carbide dispersion strengthening, among others. Previous studies have confirmed that materials treated with DLSM exhibit excellent wear resistance [14,15], high thermal fatigue resistance [16][17][18], and exceptional mechanical properties [19]. Notably, DLSM treatment avoids issues associated with conventional laser surface modification methods such as the generation of residual tensile stress, excessive surface roughness, and enhancive material brittleness, as it does not create overlapping areas on the material surface.…”

Section: Introductionmentioning

confidence: 89%

Influence of discrete laser surface melting on scuffing resistance of W6Mo5Cr4V2 steel gear

Lv,

Cui,

Sun

et al. 2024

Surf. Topogr.: Metrol. Prop.

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The gear transmission system is advancing towards high-speed and heavy-duty applications. Among the main failure modes of the system, tooth surface scuffing due to increased tooth surface temperature has emerged as a prominent concern in mechanical transmission. Addressing the enhancement of gear scuffing resistance has thus become an urgent challenge in this field. This paper utilized discrete laser surface melting (DLSM) treatment to create discrete laser surface melted (DLSMed) units on the surface of W6Mo5Cr4V2 steel gears, resembling the radial ribs found on the surface of Limaria basilica. The paper investigated the size, hardness, residual austenite content, and residual stress of the DLSMed units at varying current intensities and laser frequencies. Microstructural observations were conducted on the DLSMed units, followed by gear scuffing experiments performed on the Forschungsstelle für Zahnräder und Getriebebau (FZG) testing machine. The experimental findings revealed that the change in laser frequency had a clearly weaker impact on the size of the DLSMed unit compared to current intensity. The DLSMed unit consisted of two parts: the melting zone (MZ) and the heat-affected zone (HAZ), with equiaxed and dendritic microstructures, respectively. Both zones exhibited refinement with increasing current intensity and laser frequency. Moreover, the microhardness of the DLSMed unit showed significant improvement compared to that of as-received gears. The scuffing resistance of DLSMed gears was found to be closely linked to their initial surface roughness. Residual stress formation in DLSMed gears was attributed to thermal stress and microstructural stress. The distribution pattern of DLSMed units had varying effects on the scuffing load-carrying capacity of DLSMed gears. Specifically, DLSMed gears with transverse distribution of DLSMed units demonstrated a 12.5% improvement in anti-scuffing performance compared to those with longitudinal distribution. Finally, this paper elucidated the mechanism through which DLSM enhances the scuffing resistance of W6Mo5Cr4V2 steel gears.

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Section: Introductionmentioning

confidence: 89%

Influence of discrete laser surface melting on scuffing resistance of W6Mo5Cr4V2 steel gear

Lv,

Cui,

Sun

et al. 2024

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

show abstract

“…Through the methods of microscopic characterization, wear performance testing and finite element analysis, it was finally concluded that the wear resistance of the samples with biomimetic shapes was significantly improved compared with the unprocessed samples. Further observation of the high-strength and high-flexibility parts of animals and plants shows that it is a reticulation-like structure with “soft-hard” spacings [ 16 , 17 ]. Figure 1 shows turtle shells and dragonfly wings with a “soft-hard” reticulation-like structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Reticulate Unit Spacing on Microstructure and Properties of Biomimetic 7075 Aluminum Alloy by Laser Cladding

et al. 2023

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In the context of energy conservation and emission reduction, more and more attention has been paid to the development of lightweight metal materials with both high strength and high toughness. Inspired by the non-smooth surface of natural organisms, a biomimetic surface with various spacing reticulate units of 7075 aluminum alloys was modified by laser cladding. The microstructure, microhardness and tensile properties of the various spacing units with CeO2-SiC-Ni60 were studied. The finer microstructure and the higher microhardness of various spacing units in comparison with that of 7075 aluminum alloys were obtained, no matter the strip-like treated region or the cross-junction region. Moreover, the best combination of strength and toughness of the biomimetic sample with 2.5 mm spacing reticulate unit was discussed. Finally, by combining the microstructure, XRD phase change, thermal gradient effect, thermal expansion coefficient difference and hard phase strengthening mechanism, it was concluded that the 2.5 mm spacing reticulate unit had the best ability to inhibit crack propagation, and the dispersive hard phases of Al3Ni2 and SiC played a major role in stress release of the matrix.

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Tensile, wear, and corrosion behaviors of an in situ Al–Al3Ni metal matrix composite solidified under different cooling rates

et al. 2023

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Effects of laser-processed unit distribution density on wear resistance of biomimetic 6082 aluminum alloy

Cited by 18 publications

References 18 publications

Influence of discrete laser surface melting on scuffing resistance of W6Mo5Cr4V2 steel gear

Influence of discrete laser surface melting on scuffing resistance of W6Mo5Cr4V2 steel gear

Effect of Reticulate Unit Spacing on Microstructure and Properties of Biomimetic 7075 Aluminum Alloy by Laser Cladding

Tensile, wear, and corrosion behaviors of an in situ Al–Al3Ni metal matrix composite solidified under different cooling rates

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