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2.7. Surface Microhardness Test

PE Passent Ellakany
SF Shaimaa M. Fouda
AM Amr A. Mahrous
MA Maram A. AlGhamdi
NA Nourhan M. Aly
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Surface microhardness of the fractured IFDPs was assessed by the hardness tester machine (MicroMet 6040, Buehler LTD., Lake Bluff, IL. USA) through application of a 50 g loading force for 20 s (Standard-ASTM C1327–03) using the diamond Vickers hardness indenter (VH) [49]. An average of five indentations on different areas of each specimen was calculated. The indentation readings were detected by a single trained operator (P.E). Calculation of VH was done through the following equation:

where (KHN) represents the Knoop hardness readings, (c) represents the applied force in grams and (d) represents the length of the longest diagonal detected in mm [40].

Copyright and License information:  ©2022 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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