Thermo-mechanical Fatigue Behaviour of AlSi7Mg Alloy Processed by Selective Laser Melting

Zahra Sajedi, Riccardo Casati, M. C. Poletti, Mateusz Skalon, Christoph Sommitsch, Maurizio Vedani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Heat treatable hypo-eutectic AlSi7Mg (A357) alloy is widely used for lightweight structural parts and for high temperature applications such as in cast cylinder heads.
AlSi7Mg is also a suitable alloy to be processed by selective laser melting (SLM), owing to its narrow solidification range, resistance to hot cracking and good fluidity. Employing SLM-processed parts made by AlSi7Mg in high temperature applications with cyclic thermal loads requires good resistance to thermo-mechanical fatigue due to the critical strains and stresses induced by the fluctuating temperature. In this study, the thermo-mechanical fatigue behaviour of A357 alloy samples produced by SLM has been investigated using a Gleeble®3800 simulator. A correlation has been found between the applied mechanical stress and thermo-mechanical fatigue life. Analyses on the mechanisms of failure allowed to draw conclusions about the relation between the thermo-mechanical fatigue strength and peculiar microstructure formed by SLM-processing.
Original languageEnglish
Title of host publicationEuro PM2019 - Congress and Exhibition
PublisherEuropean Powder Metallurgy Association
Publication statusSubmitted - Oct 2019
EventEuro PM2019 - Congress and Exhibition - Maastricht , Netherlands
Duration: 13 Oct 201916 Oct 2019
https://www.europm2019.com/

Conference

ConferenceEuro PM2019 - Congress and Exhibition
CountryNetherlands
CityMaastricht
Period13/10/1916/10/19
Internet address

Fingerprint Dive into the research topics of 'Thermo-mechanical Fatigue Behaviour of AlSi7Mg Alloy Processed by Selective Laser Melting'. Together they form a unique fingerprint.

  • Cite this

    Sajedi, Z., Casati, R., Poletti, M. C., Skalon, M., Sommitsch, C., & Vedani, M. (2019). Thermo-mechanical Fatigue Behaviour of AlSi7Mg Alloy Processed by Selective Laser Melting. Manuscript submitted for publication. In Euro PM2019 - Congress and Exhibition European Powder Metallurgy Association.