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

Zahra Sajedi; Riccardo Casati; Maria Cecilia Poletti; Mateusz Skalon; Christof Sommitsch; Maurizio Vedani

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

Zahra Sajedi, Riccardo Casati, Maria Cecilia Poletti, Mateusz Skalon, Christof Sommitsch, Maurizio Vedani

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

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 language	English
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

Conference

Conference	Euro PM2019 - Congress and Exhibition
Country/Territory	Netherlands
City	Maastricht
Period	13/10/19 → 16/10/19
Internet address	https://www.europm2019.com/

Keywords

AlSi7Mg
Damage mechanisms
Selective laser melting
Thermo-mechanical fatigue

ASJC Scopus subject areas

Metals and Alloys
Surfaces, Coatings and Films
Surfaces and Interfaces

Access to Document

2019 EUROPM Zahra Sajedi EP1904321688_SAJEDI_FinalFinal published version, 640 KB

Cite this

Thermo-mechanical Fatigue Behaviour of AlSi7Mg Alloy Processed by Selective Laser Melting. / Sajedi, Zahra; Casati, Riccardo; Poletti, Maria Cecilia et al.
Euro PM2019 - Congress and Exhibition. European Powder Metallurgy Association, 2019. (Euro PM 2019 Congress and Exhibition).

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

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title = "Thermo-mechanical Fatigue Behaviour of AlSi7Mg Alloy Processed by Selective Laser Melting",

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{\textregistered}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.",

keywords = "AlSi7Mg, Damage mechanisms, Selective laser melting, Thermo-mechanical fatigue",

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year = "2019",

language = "English",

series = "Euro PM 2019 Congress and Exhibition",

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T1 - Thermo-mechanical Fatigue Behaviour of AlSi7Mg Alloy Processed by Selective Laser Melting

AU - Sajedi, Zahra

AU - Casati, Riccardo

AU - Poletti, Maria Cecilia

AU - Skalon, Mateusz

AU - Sommitsch, Christof

AU - Vedani, Maurizio

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - AlSi7Mg

KW - Damage mechanisms

KW - Selective laser melting

KW - Thermo-mechanical fatigue

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M3 - Conference paper

AN - SCOPUS:85099232764

T3 - Euro PM 2019 Congress and Exhibition

BT - Euro PM2019 - Congress and Exhibition

PB - European Powder Metallurgy Association

T2 - Euro PM2019 - Congress and Exhibition

Y2 - 13 October 2019 through 16 October 2019

ER -

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

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Access to Document

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Thermal fatigue testing of laser powder bed fusion (L-PBF) processed AlSi7Mg alloy in presence of a quasi-static tensile load

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