Increasing the micromechanical and tribological characteristics of an austenitic steel by surface deformation processing

Скорынина, П. А.; Makarov, A. V.; Волкова, Е. Г.; Осинцева, А. Л.

doi:10.1063/1.5084425

Cited by 1 publication

(1 citation statement)

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“…47) The rate of elastic recovery, which is the value obtained by dividing the recovery displacement (maximum displacement: h max -permanent displacement: h p ) by the maximum displacement, was likewise calculated and compared with each other. 49,50) When the resistance to plastic deformation was calculated, the aluminum alloy exhibited resistance to plastic deformation of about 10.9% at 0 h of hydrogen charging, but the resistance to plastic deformation decreased to 8.4% at the maximum as the hydrogen charging time increased. However, the resistance to plastic deformation of the CrNcoated aluminum alloy increased from 53.3% to 57.7% depending on the hydrogen charging time.…”

Section: Resultsmentioning

confidence: 99%

Effect of hydrogen charging on the mechanical characteristics and coating layer of CrN-coated aluminum alloy for light-weight FCEVs

Shin

Kim

2023

Jpn. J. Appl. Phys.

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To commercialize the fuel cell electric vehicles(FCEVs), it is essential to reduce the weights of the components and lower the manufacturing cost. In this research, the effect of hydrogen charging on the mechanical characteristics of aluminum alloys and CrN coating was also investigated through cathodic hydrogen charging, indentation, and scratch experiments. The delamination of the CrN coating by hydrogen charging was observed through the experiments. In addition, as the hydrogen charging time increased, the hardness of the aluminum alloy increased about 29.7%, whereas the hardness of the CrN coating decreased about 42.8%. In particular, in the scratch experiment, it was found that hydrogen embrittlement and hydrogen blistering occurred at the interface between the CrN coating layer and the aluminum alloy due to hydrogen permeation and diffusion. Therefore the adhesion strength of the CrN coating decreased significantly. However, the CrN coating was presented to suppress hydrogen permeation into the aluminum alloy.

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Section: Resultsmentioning

confidence: 99%