Research Article|Open Access
|Issue|Published: 06 April 2013
Determination of fracture toughness using the area of micro-crack tracks left in brittle materials by Vickers indentation test
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Alireza MORADKHANI*,a(
), Hamidreza BAHARVANDIb, Mehdi TAJDARIc, Hamidreza LATIFId, Jukka MARTIKAINENd
Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Hesarak, Poonak, P.O. Box 14515/775, Tehran, Iran
Department of Materials Engineering, Malek Ashtar University of Technology, Lavizan, P.O. Box 15875/1774, Tehran, Iran
Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Vahdat St., Hafezieh Sq., P.O. Box 381814/6775, Arak, Iran
Department of Mechanical Engineering, Laboratory of Welding Technology, Lappeenranta University of Technology, Skinnarilankatu 34, P.O. Box 20, FI-53851Lappeenranta, Finland
MORADKHANI A, BAHARVANDI H, TAJDARI M, et al. Determination of fracture toughness using the area of micro-crack tracks left in brittle materials by Vickers indentation test. Journal of Advanced Ceramics, 2013, 2(1): 87-102. https://doi.org/10.1007/s40145-013-0047-z
In this article, a new method has been presented for the estimation of fracture toughness in brittle materials, which enjoys improved accuracy and reduced costs associated with fracture toughness testing procedure compared to similar previous methods, because a vast range of specimens with irregular cracks can be accommodated for testing. Micron-sized alumina powders containing 0.05 wt% magnesium oxide (MgO) nanoparticles were mixed and also together with 2.5 vol%, 5 vol%, 7.5 vol%, 10 vol%, and 15 vol% of silicon carbide (SiC) nanopowders separately. By making and testing various types of ceramics with different mechanical properties, and considering the irregular cracks around the indented area caused by Vickers diamond indenter, a semi-empirical fracture toughness equation has been obtained.
Determination of fracture toughness using the area of micro-crack tracks left in brittle materials by Vickers indentation test
Show Author's information
Hide Author's Information
Alireza MORADKHANI*,a(
), Hamidreza BAHARVANDIb, Mehdi TAJDARIc, Hamidreza LATIFId, Jukka MARTIKAINENd
Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Hesarak, Poonak, P.O. Box 14515/775, Tehran, Iran
Department of Materials Engineering, Malek Ashtar University of Technology, Lavizan, P.O. Box 15875/1774, Tehran, Iran
Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Vahdat St., Hafezieh Sq., P.O. Box 381814/6775, Arak, Iran
Department of Mechanical Engineering, Laboratory of Welding Technology, Lappeenranta University of Technology, Skinnarilankatu 34, P.O. Box 20, FI-53851Lappeenranta, Finland
Abstract
In this article, a new method has been presented for the estimation of fracture toughness in brittle materials, which enjoys improved accuracy and reduced costs associated with fracture toughness testing procedure compared to similar previous methods, because a vast range of specimens with irregular cracks can be accommodated for testing. Micron-sized alumina powders containing 0.05 wt% magnesium oxide (MgO) nanoparticles were mixed and also together with 2.5 vol%, 5 vol%, 7.5 vol%, 10 vol%, and 15 vol% of silicon carbide (SiC) nanopowders separately. By making and testing various types of ceramics with different mechanical properties, and considering the irregular cracks around the indented area caused by Vickers diamond indenter, a semi-empirical fracture toughness equation has been obtained.
Wang MD, Shaw L. Effects of the powder manufacturing method on microstructure and wear performance of plasma sprayed alumina–titania coatings. Surf Coat Technol 2007, 202: 34–44.
Vullo P, Davis MJ. Comparative study of micro-indentation and Chevron notch fracture toughness measurements of silicate and phosphate glasses. J Non-Cryst Solids 2004, 349: 180–184.
Miyazaki H, Hyuga H, Hirao K, et al. Comparison of fracture resistance as measured by the indentation fracture method and fracture toughness determined by the single-edge-precracked beam technique using silicon nitrides with different microstructures. J Eur Ceram Soc 2007, 27: 2347–2354.
RiceRW. Microstructural dependence of fracture energy and toughness of ceramics and ceramic composites versus that of their tensile strengths at 22 ℃. J Mater Sci1996, 31: 4503–4519.10.1007/BF00366346
Kruzic JJ, Kim DK, Koester KJ, et al. Indentation techniques for evaluating the fracture toughness of biomaterials and hard tissues. J Mech Behav Biomed 2009, 2: 384–395.
Mullins LP, Bruzzi MS, McHugh PE. Measurement of the microstructural fracture toughness of cortical bone using indentation fracture. J Biomech 2007, 40: 3285–3288.
Palmqvist S. Energy causing cracks at corners of Vickers indentations as measure of toughness of hard metals. Archiv fuer das Eisenhuettenwes 1962, 33: 629–634.
Anstis GR, Chantikul P, Lawn BR, et al. A critical evaluation of indentation techniques for measuring fracture toughness: I, Direct crack measurements. J Am Ceram Soc 1981, 64: 533–538.
Ponton CB, Rawlings RD. Vickers indentation fracture toughness test Part 1: Review of literature and formulation of standardized indentation toughness equations. Mater Sci Tech 1989, 5: 865–872.
Bhat M, Kaur B, Kumar R, et al. Effect of ion irradiation on dielectric and mechanical characteristics of ErFeO3 single crystals. Nucl Instrum Meth B 2005, 234: 494–508.
Niihara K, Morena R, Hasselman DPH. Evaluation of KIC of brittle solids by the indentation method with low crack-to-indent ratios. J Mater Sci Lett 1982, 1: 13–16.
Evans AG. Fracture toughness: The role of indentation techniques. In Fracture Mechanics Applied to Brittle Materials. Freiman SW, Ed. ASTM International, 1979: 112–135.
ASTM International. ASTM C769-98. Standard test method for sonic velocity in manufactured carbon and graphite materials for use in obtaining an approximate Young’s modulus.
Ahmadzadeh M, Baharvandi HR, Abdizadeh H, et al. Synthesis of nano-size MgO powder by chemical deposition of low cost raw materials. Int J Mod Phys B 2008, 22: 3185–3192.
Jeong Y K, Nihara K. Microstructure and properties of alumina–silicon carbide nanocomposite fabricate by pressurelless sintering and post hot-isostatic pressing. Trans Nonferrous Met Soc China 2011, 21: s1–s6.
Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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