Dynamic Versus Quasi Static Fracture Toughness of Additively Manufactured AlSi10Mg Alloy by Selective Laser Melting Technique

Authors

  • E. Chakotay Materials Department, Nuclear Research Center Negev
  • R. Carmi Materials Department, Nuclear Research Center Negev
  • I. Alon Materials Department, Nuclear Research Center Negev
  • R. Shneck Department of Materials Engineering, Ben-Gurion University of the Negev
  • M. Pinkas Materials Department, Nuclear Research Center Negev
  • A. Stern Department of Materials Engineering, Ben-Gurion University of the Negev
  • A. Bussiba Materials Department, Nuclear Research Center Negev

DOI:

https://doi.org/10.35219/awet.2018.05

Keywords:

AlSi10Mg alloy, AM-SLM powder-bed system, fatigue initiation fracture toughness, quasi static, dynamic properties, impact loading

Abstract

In today's additive manufacturing sector, one of the most popular areas is selective laser melting (SLM) due to its capability of producing geometrically complex metal parts directly from CAD model in a few short steps. Many studies have been reported on static mechanical properties of SLM components; however, dynamic properties of SLM components of different materials have not been thoroughly investigated. Only few papers have been published on the dynamic mechanical behavior, especially in the crack resistance of selective laser melted AlSi10Mg alloy. In the present study, the effect of loading rate, dynamic versus quasi static, on the fracture toughness of the as-built alloy (X and Z orientations) has been investigated. The experimental results revealed the inherently anisotropic behavior for loading rates where the Z orientation exhibited lower toughness compared to the x orientation. The dynamic loading by impact, resulted in a significant decrease of the toughness values up to about 50% compared to the quasi-static loading. This mechanical response was attributed to the increase in the yield stress which alters the state stress at the crack tip from the planestress to some extent of the mix-mode plane stress/strain.

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Published

2018-12-28

Issue

Vol. 29 (2018)

Section

Articles

License

Papers accepted for publication become the copyrighted property of the Annals of "Dunarea de Jos" University of Galati, Fascicle XII, Welding Equipment and Technology. No part of the publication may be reproduced or transmitted in any form, or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, except in limited quantities for the non-commercial purposes of scientific or educational advancement, without permission in writing from the Editorial Board.

How to Cite

Dynamic Versus Quasi Static Fracture Toughness of Additively Manufactured AlSi10Mg Alloy by Selective Laser Melting Technique. (2018). Annals of “Dunarea de Jos” University of Galati. Fascicle XII, Welding Equipment and Technology, 29, 33-40. https://doi.org/10.35219/awet.2018.05

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