Effect of thermal treatments in high purity Ar on the oxidation and tribological behavior of arc-PVD c-Al0.66Ti0.33N coatings

Mondragón-Rodríguez, G.C.; Godoy, Yuri Lizbeth Chipatecua; Camacho, N.; Espinosa-Arbeláez, D.G.; Carmona, Juan Manuel González; González‐Hernández, J.; Alvarado-Orozco, J.M.

doi:10.1016/j.surfcoat.2019.01.070

Cited by 7 publications

(1 citation statement)

References 41 publications

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“…The other heat treatment methods, such as quenching, tempering, and precipitation hardening, lead to the formation of specific microstructures and enhance hardness and strength [9,10]. These thermal treatments often induce additional thermal stress into the samples and could also lead to severe oxidation under nonvacuum conditions [11,12]. Other than thermal processing, severe plastic deformation (SPD) technique, spark plasma sintering (SPS), Laser Engraving, and surface mechanical treatment are some microstructure modification methods, each tailored to specific needs and applications [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Room temperature control of grain orientation via directionally modulated current pulses

Rahman,

Oh,

Waryoba

et al. 2023

Mater. Res. Express

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Traditional approaches to control the microstructure of materials, such as annealing, require high temperature treatment for long periods of time. In this study, we present a room temperature microstructure manipulation method by using the mechanical momentum of electrical current pulses. In particular, a short burst of high-density current pulses with low duty cycle is applied to an annealed FeCrAl alloy, and the corresponding response of microstructure is captured by using Electron Backscattered Diffraction (EBSD) analysis. We show evidence of controllable changes in grain orientation at specimen temperature below 28 C. To demonstrate such microstructural control, we apply the current pulses in two perpendicular directions and observe the corresponding grain rotation. Up to 18 of grain rotation was observed, which could be reversed by varying the electropulsing direction. Detailed analysis at the grain level reveals that electropulsing in a specific direction induces clockwise rotation from their pristine state, while subsequent cross-perpendicular electropulsing results in an anticlockwise rotation. In addition, our proposed room temperature processing yields notable grain refinement, while the average misorientation and density of low-angle grain boundaries (LAGBs) remain unaltered. The findings of this study highlight the potentials of 'convective diffusion' in electrical current based materials processing science towards microstructural control at room temperature.

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