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.
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 language | English |
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Title of host publication | Euro PM2019 - Congress and Exhibition |
Publisher | European Powder Metallurgy Association |
ISBN (Electronic) | 9781899072514 |
Publication status | Published - 2019 |
Event | Euro PM2019 - Congress and Exhibition - Maastricht , Netherlands Duration: 13 Oct 2019 → 16 Oct 2019 https://www.europm2019.com/ |
Publication series
Name | Euro PM 2019 Congress and Exhibition |
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Conference
Conference | Euro PM2019 - Congress and Exhibition |
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Country/Territory | Netherlands |
City | Maastricht |
Period | 13/10/19 → 16/10/19 |
Internet address |
Keywords
- AlSi7Mg
- Damage mechanisms
- Selective laser melting
- Thermo-mechanical fatigue
ASJC Scopus subject areas
- Metals and Alloys
- Surfaces, Coatings and Films
- Surfaces and Interfaces