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Yielding and failure of hot chamber die cast thin-walled AZ91D
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-0101-0062
2016 (English)In: Metallurgia Italiana, ISSN 0026-0843, Vol. 108, no 6, 53-56 p.Article in journal (Refereed) Published
Abstract [en]

Thin-walled components in AZ91D magnesium are commonly cast using hot chamber die casting. AZ91D mechanical properties commonly show scatter and its low critically resolved shear stress cause early yield with an ill-defined yield point. This may result in large differences between the true yield point or proportionality limit and the off-set proof stress. The current study takes a look at this and its relation to the failure of the component. The material investigated was a hot chamber die cast material with a wall thickness of 0.8mm. Tensile tests were made and the proportionality limit and off-set proof stress was established as well as elongation to failure and tensile strength. The overall average off-set proof stress was 154 MPa and the overall proportionality limit was 63 MPa resulting in a typical property Stress Gap of 91MPa. This difference varied from 65MPa up to 105MPa. The Apparent Toughness was also evaluated The Stress Gap and Apparent Toughness was analysed and the influence of process parameters established.

Place, publisher, year, edition, pages
Milano: Associazione italiana di metallurgia , 2016. Vol. 108, no 6, 53-56 p.
Keyword [en]
AZ91D, Elongation, Hot chamber die casting, Magnesium, Process parameters, Toughness, Yelding, Die casting, Dies, Magnesium castings, Shear stress, Stresses, Tensile strength, Tensile testing, Thin walled structures, Critically resolved shear stress, Elongation to failure, Hot chamber die castings, Influence of process parameters, Thin walled components, Yield stress
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-34975Scopus ID: 2-s2.0-85009380857OAI: oai:DiVA.org:hj-34975DiVA: diva2:1070542
Available from: 2017-02-01 Created: 2017-02-01 Last updated: 2017-02-06Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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