Surface Nanocrystallization and Amorphization of Dual-Phase TC11 Titanium Alloys under Laser Induced Ultrahigh Strain-Rate Plastic Deformation

Luo, Sihai; Zhou, Lian; Wang, Xuede; Cao, Xin; Nie, Xiangfan; He, Weifeng

doi:10.3390/ma11040563

Cited by 17 publications

(8 citation statements)

References 41 publications

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“…Phase transformation were not detected in XRD analysis, but an increase in the static load increased the half width of peak. The increased half width of the peak suggests the formation of amorphous state [35], and it is considered that this may be related to the grain refinement using UNSM treatment.…”

Section: Resultsmentioning

confidence: 99%

The Effect of the Static Load in the UNSM Process on the Corrosion Properties of Alloy 600

Kim

2019

Materials

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To suppress stress corrosion-cracking, compressive residual stresses, such as shot peening, laser peening, water jet peening, ultrasonic peening, and ultrasonic nanocrystal surface modification (UNSM) are utilized. However, among the numerous techniques, there is little research about the corrosion effect of detailed conditions, such as static load or amplitude in UNSM. A study on UNSM among various techniques of adding compressive residual stress to Alloy 600 was conducted. The focus of this study was on the effect of the static load in UNSM on the corrosion properties of Alloy 600. Microstructure analysis was conducted using an optical microscope (OM), a scanning electron microscope (SEM), and electron backscattering diffraction (EBSD), while compressive residual stress was measured using a nano-indentation technique. A cyclic polarization test and the AC (Alternating Current)-impedance measurement were both used to analyze the corrosion properties. An increase in static load under critical static load enhanced the grain boundary diffusion, consequently strengthened the passive film, and facilitated the surface diffusion, thereby improving the passivation of Alloy 600. However, higher static loads over the critical value can lead to an increase in the friction between the striking tip and the surface, thereby creating an overlapped wave, which reduces the corrosion properties.

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Section: Resultsmentioning

confidence: 99%

The Effect of the Static Load in the UNSM Process on the Corrosion Properties of Alloy 600

Kim

2019

Materials

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“…Luo et al research team applied an innovative surface technology, laser shock peening (LSP), to the dual-phase TC11 titanium alloy to fabricate an amorphous and nanocrystalline surface layer at room temperature, for the ultrahigh strain-rate plastic deformation [16].…”

Section: Overview On the Themed Issuementioning

confidence: 99%

Advanced Simulation Tools Applied to Materials Development and Design Predictions

et al. 2019

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This thematic issue on advanced simulation tools applied to materials development and design predictions gathers selected extended papers related to power generation systems, presented at the XIX International Colloquium on Mechanical Fatigue of Metals (ICMFM XIX) organized at University of Porto, Portugal, in 2018. Guest editors express special thanks to all contributors for the success of this special issue—authors, reviewers, and journal staff.

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“…Laser shock peening uses high-voltage plasma shock waves generated during the interaction between high-power short-pulse lasers and metal or ceramic materials so that the material has high residual compressive stress after the impact [ 4 , 5 ]. In comparison to general material modification methods (such as mechanical shot peening, cold extrusion, laser heat treatment, etc.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on Laser Shock Peening of B4C-TiB2 Composite Ceramics

et al. 2023

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The introduction of residual stresses using laser shock peening (LSP) is an effective means of improving the mechanical properties of ceramics. Numerical simulations offer greater convenience and efficiency than in-lab experiments when testing the effects of different processing techniques on residual stress distribution. In this work, a B4C-TiB2 ceramic model based on the extended Drucker–Prager model was established to investigate the effects of laser power density, the number of impacts and laser spot overlapping rate on the residual stress distribution, and the reliability of the simulation method was verified by experimental data. The following results are obtained: increasing the laser power density and the number of impacts can increase the surface residual compressive stress and reduce the depth of the residual compressive stress; the presence of multiple impacts will significantly reduce the depth of the residual compressive stress layer; with the increase in the laser spot overlapping rate, the compressive residual stress in the processed area gradually increases and is more uniformly distributed; the best processing effect can be achieved by using a spot overlapping rate of 50%.

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Surface Nanocrystallization and Amorphization of Dual-Phase TC11 Titanium Alloys under Laser Induced Ultrahigh Strain-Rate Plastic Deformation

Cited by 17 publications

References 41 publications

The Effect of the Static Load in the UNSM Process on the Corrosion Properties of Alloy 600

The Effect of the Static Load in the UNSM Process on the Corrosion Properties of Alloy 600

Advanced Simulation Tools Applied to Materials Development and Design Predictions

Numerical Simulation on Laser Shock Peening of B4C-TiB2 Composite Ceramics

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