Fracture Properties of Mg-Alloys Assessed with Nanoindentation
This paper deals with micromechanical properties of biocompatible magnesium alloys MgCa0.8 prepared by extrusion. At first, the microstructure, elastic and hardness properties are assessed at the scale of one micrometer by means of a nanoindenter. Further, determination of fracture mechanism, fractu...
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Published in | Materials Science Forum Vol. 891; pp. 257 - 262 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Pfaffikon
Trans Tech Publications Ltd
22.03.2017
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Subjects | |
Online Access | Get full text |
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Summary: | This paper deals with micromechanical properties of biocompatible magnesium alloys MgCa0.8 prepared by extrusion. At first, the microstructure, elastic and hardness properties are assessed at the scale of one micrometer by means of a nanoindenter. Further, determination of fracture mechanism, fracture area and fracture toughness of the alloy is studied with sharp indentation, optical microscopy and SEM and by means of energetic methods. Based on the examination of optical images it was concluded that the Mg matrix is not vulnerable to distinct cracking around indents even for high indentation loads. By computations, it was found the fracture area is very small, about 0.7-3% of the tip contact area based on the assumption of limit values of the target fracture toughness 10-20 MPa·m1/2. |
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Bibliography: | Selected, peer reviewed papers from the 16th International Symposium on Metallography and Materials Science, April 20-22, 2016, Stará Lesná, High Tatra Mountains, Slovak Republic ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISBN: | 9783035710182 303571018X |
ISSN: | 0255-5476 1662-9752 1662-9752 |
DOI: | 10.4028/www.scientific.net/MSF.891.257 |