Relationships in instrumented indentation by Berkovich indenter

Liu, Ming; Cong, Zhaotong; Fu, Haiying; Li, Pengyuan

doi:10.1557/s43578-022-00769-x

Cited by 10 publications

(1 citation statement)

References 112 publications

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“…There are close-to-linear or non-linear relationships between the ratio of W e /W t or W p /W t and the ratio of hardness to the reduced modulus (H/E r ), depending on the material and indenter angle. The ratio of h r /h max is equivalent to that of W p /W t [73][74][75][76]. By knowing the Poisson's ratio of the sample and indenter and the Young's modulus of the indenter, Young's modulus of the sample (E) can be obtained, enabling the calculation of H/E [54].…”

Section: Hardness Of Nitrided Layersmentioning

confidence: 99%

Scratch Response of Hollow Cathode Radiofrequency Plasma-Nitrided and Sintered 316L Austenitic Stainless Steel

Broch,

Fontoura,

Lima

et al. 2024

Coatings

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Low-temperature plasma nitriding is a thermochemical surface treatment that promotes surface hardening and wear resistance enhancement without compromising the corrosion resistance of sintered austenitic stainless steels. Hollow cathode radiofrequency (RF) plasma nitriding was conducted to evaluate the influence of the working pressure and nitriding time on the microstructure and thickness of the nitrided layers. A group of samples of sintered 316L austenitic stainless steel were plasma-nitrided at 400 °C for 4 h, varying the working pressure from 160 to 25 Pa, and the other group was treated at the same temperature, varying the nitriding time (2 h and 4 h) while keeping the pressure at 25 Pa. A higher pressure resulted in a thinner, non-homogeneous nitrided layer with an edge effect. Regardless of the nitriding duration, the lowest pressure (25 Pa) promoted the formation of a homogenously nitrided layer composed of nitrogen-expanded austenite that was free of iron or chromium nitride and harder and more scratching-wear-resistant than the soft steel substrate.

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