Micromechanisms of Fracture of Magnesium Based Composite After Superplastic Deformation

Beáta Ballóková; Katarína Sülleiová; Michal Besterci; Oksana Velgosová; Song-Jeng Huang

doi:10.1515/pmp-2016-0010

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Micromechanisms of Fracture of Magnesium Based Composite After Superplastic Deformation

Powder Metallurgy Progress

Volume 16 (2016): Issue 2 (December 2016)

By: Beáta Ballóková, Katarína Sülleiová, Michal Besterci, Oksana Velgosová and Song-Jeng Huang

Open Access

|Jan 2017

Abstract

The micromechanisms of fracture of AZ61 + 1 wt. % Al₂O₃ composite in the zone of superplastic deformation was analysed and quantified in this work. The specimens were tested at temperature of 200°C at different strain rates. Changing the strain rate, from 1x10^-2 s^-1 to 1x10^-4 s^-1, a significant growth of ductility was observed. At maximum value of superplasticity the fracture was transcrystalline ductile with dimples of two size categories. Based on the statistical analysis of fracture micromechanisms at the elevated temperature and strain rates of 10^-0- 1x10^-4 s^-1 hyperbolic dependency was depicted according to Gurland - Plateau theory.

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Articles in this issue

DOI: https://doi.org/10.1515/pmp-2016-0010 | Journal eISSN: 1339-4533 | Journal ISSN: 1335-8987

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Language: English

Page range: 117 - 122

Published on: Jan 20, 2017

Published by: Slovak Academy of Sciences, Institute of Materials Research

In partnership with: Paradigm Publishing Services

Publication frequency: 2 issues per year

Keywords:

Mg Alloy AZ61,

fracture analysis,

superplastic behaviour

Related subjects:

Engineering,

Mechanical engineering,

Fundamentals of mechanical engineering,

Bioengineering and biomedical engineering,

Biomedical electronics,

Materials sciences,

Materials sciences, other

© 2017 Beáta Ballóková, Katarína Sülleiová, Michal Besterci, Oksana Velgosová, Song-Jeng Huang, published by Slovak Academy of Sciences, Institute of Materials Research
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 16 (2016): Issue 2 (December 2016)