Please use this identifier to cite or link to this item: https://scidar.kg.ac.rs/handle/123456789/10988
Title: Knoop hardness optimal loading in measuring microhardness of maraging steel obtained by selective laser melting
Authors: Balos, Sebastian
Rajnovic, Dragan
Šidjanin Leposava
Ćirić Kostić, Snežana
Bogojevic, Nebojsa
Pecanac, Milan
Pavlicevic, Jelena
Issue Date: 2019
Abstract: © IMechE 2019. Knoop microhardness method possesses several advantages over Vickers testing: lower penetration depth, higher accuracy in indentation measurement, and a better suitability to measuring thin and elongated morphological features. This study explores the optimal loading and load independent hardness of selective laser melted specimens in non-heat-treated and heat-treated conditions, by using different Knoop test loads. The obtained results were used to plot load to indentation size charts, which, in turn, were used to obtain prediction curves in accordance to Meyer, proportional specimen resistance, and modified proportional specimen resistance models. The fitting of fitting curves to the measured values was used to calculate appropriate correlation factors. The results indicate that indentation size effect occurs in all measured specimens. This suggests that there is material true microhardness. Also, the most adequate model was modified proportional specimen resistance, with correlation factors just under one.
URI: https://scidar.kg.ac.rs/handle/123456789/10988
Type: article
DOI: 10.1177/0954406219841081
ISSN: 0954-4062
SCOPUS: 2-s2.0-85065157058
Appears in Collections:Faculty of Mechanical and Civil Engineering, Kraljevo

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