Fatigue of AlSi10Mg specimens fabricated by additive manufacturing selective laser melting (AM-SLM)

Naor Elad Uzan; Roni Shneck; Ori Yeheskel; Nachum Frage

doi:10.1016/j.msea.2017.08.027

Fatigue of AlSi10Mg specimens fabricated by additive manufacturing selective laser melting (AM-SLM)

Naor Elad Uzan, Roni Shneck, Ori Yeheskel, Nachum Frage

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

252 Scopus citations

Abstract

The fatigue resistance of AM-SLM AlSi10Mg samples built in the Z direction after various heat treatments was investigated. Specimens were tested in the as-built (AB) condition, after stress relief (SR) treatment and after SR and hot isostatic pressing (HIP) at either 250 °C or 500 °C. The AB machined and polished specimens displayed the highest fatigue limit (S_f = 125 MPa, N_f = 10⁷ cycles). SR and HIP cycles decrease the yield strength, hardness and fatigue limit. The SR and HIP treatment at 500 °C resulted in the lowest fatigue resistance due to significant microstructural changes. A relation between the yield stress and fatigue resistance was established. Linear elastic fracture mechanics were employed for evaluating fracture surface morphology. Based on the results of fracture surface characterization, values of the critical stress intensity factor (K_cr) for AM-SLM AlSi10Mg specimens after various heat treatments were estimated.

Original language	English
Pages (from-to)	229-237
Number of pages	9
Journal	Materials Science and Engineering: A
Volume	704
DOIs	https://doi.org/10.1016/j.msea.2017.08.027
State	Published - 17 Sep 2017

Keywords

Additive manufacturing
AlSi10Mg
Fatigue
Fractography
Fracture toughness
Hot isostatic pressing
Tensile properties

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.msea.2017.08.027

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title = "Fatigue of AlSi10Mg specimens fabricated by additive manufacturing selective laser melting (AM-SLM)",

abstract = "The fatigue resistance of AM-SLM AlSi10Mg samples built in the Z direction after various heat treatments was investigated. Specimens were tested in the as-built (AB) condition, after stress relief (SR) treatment and after SR and hot isostatic pressing (HIP) at either 250 °C or 500 °C. The AB machined and polished specimens displayed the highest fatigue limit (Sf = 125 MPa, Nf = 107 cycles). SR and HIP cycles decrease the yield strength, hardness and fatigue limit. The SR and HIP treatment at 500 °C resulted in the lowest fatigue resistance due to significant microstructural changes. A relation between the yield stress and fatigue resistance was established. Linear elastic fracture mechanics were employed for evaluating fracture surface morphology. Based on the results of fracture surface characterization, values of the critical stress intensity factor (Kcr) for AM-SLM AlSi10Mg specimens after various heat treatments were estimated.",

keywords = "Additive manufacturing, AlSi10Mg, Fatigue, Fractography, Fracture toughness, Hot isostatic pressing, Tensile properties",

author = "Uzan, {Naor Elad} and Roni Shneck and Ori Yeheskel and Nachum Frage",

note = "Funding Information: This study was supported by Research Grant 2022851 from the Israel Ministry of Science, Technology and Space . The authors thank Sharon Tuvia (1982), Ltd. for providing the materials and fabrication facilities. Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

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doi = "10.1016/j.msea.2017.08.027",

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AU - Uzan, Naor Elad

AU - Shneck, Roni

AU - Yeheskel, Ori

AU - Frage, Nachum

N1 - Funding Information: This study was supported by Research Grant 2022851 from the Israel Ministry of Science, Technology and Space . The authors thank Sharon Tuvia (1982), Ltd. for providing the materials and fabrication facilities. Publisher Copyright: © 2017 Elsevier B.V.

PY - 2017/9/17

Y1 - 2017/9/17

N2 - The fatigue resistance of AM-SLM AlSi10Mg samples built in the Z direction after various heat treatments was investigated. Specimens were tested in the as-built (AB) condition, after stress relief (SR) treatment and after SR and hot isostatic pressing (HIP) at either 250 °C or 500 °C. The AB machined and polished specimens displayed the highest fatigue limit (Sf = 125 MPa, Nf = 107 cycles). SR and HIP cycles decrease the yield strength, hardness and fatigue limit. The SR and HIP treatment at 500 °C resulted in the lowest fatigue resistance due to significant microstructural changes. A relation between the yield stress and fatigue resistance was established. Linear elastic fracture mechanics were employed for evaluating fracture surface morphology. Based on the results of fracture surface characterization, values of the critical stress intensity factor (Kcr) for AM-SLM AlSi10Mg specimens after various heat treatments were estimated.

AB - The fatigue resistance of AM-SLM AlSi10Mg samples built in the Z direction after various heat treatments was investigated. Specimens were tested in the as-built (AB) condition, after stress relief (SR) treatment and after SR and hot isostatic pressing (HIP) at either 250 °C or 500 °C. The AB machined and polished specimens displayed the highest fatigue limit (Sf = 125 MPa, Nf = 107 cycles). SR and HIP cycles decrease the yield strength, hardness and fatigue limit. The SR and HIP treatment at 500 °C resulted in the lowest fatigue resistance due to significant microstructural changes. A relation between the yield stress and fatigue resistance was established. Linear elastic fracture mechanics were employed for evaluating fracture surface morphology. Based on the results of fracture surface characterization, values of the critical stress intensity factor (Kcr) for AM-SLM AlSi10Mg specimens after various heat treatments were estimated.

KW - Additive manufacturing

KW - AlSi10Mg

KW - Fatigue

KW - Fractography

KW - Fracture toughness

KW - Hot isostatic pressing

KW - Tensile properties

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JO - Materials Science and Engineering: A

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Fatigue of AlSi10Mg specimens fabricated by additive manufacturing selective laser melting (AM-SLM)

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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