High and very high cycle fatigue failure mechanisms in selective laser melted aluminum alloys

Selective laser melting, a laser-based additive manufacturing process, can manufacture components with good geometrical integrity. Application of the selective laser melting process for serial production is subject to its reliability on mechanical properties, especially on fatigue behavior, when it...

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Bibliographic Details
Published inJournal of materials research Vol. 32; no. 23; pp. 4296 - 4304
Main Authors Siddique, Shafaqat, Awd, Mustafa, Tenkamp, Jochen, Walther, Frank
Format Journal Article
LanguageEnglish
Published New York, USA Cambridge University Press 14.12.2017
Springer International Publishing
Springer Nature B.V
Subjects
Additive manufacturing
Aluminum alloys
Aluminum base alloys
Applied and Technical Physics
Biomaterials
Cooling
Crack initiation
Crack propagation
Energy
Failure mechanisms
Fatigue failure
Fatigue strength
Friction stir welding
Heat treatment
High cycle fatigue
Hybrid structures
Inorganic Chemistry
Investigations
Laser applications
Laser beam melting
Lasers
Materials Engineering
Materials research
Materials Science
Mechanical properties
Microstructure
Nanotechnology
Nondestructive testing
Process heat
Rapid prototyping
Stress concentration
Titanium alloys
fatigue
microstructure
Al
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Summary:Selective laser melting, a laser-based additive manufacturing process, can manufacture components with good geometrical integrity. Application of the selective laser melting process for serial production is subject to its reliability on mechanical properties, especially on fatigue behavior, when it is required to be applied for dynamic applications. This study focuses on microstructural, quasistatic, high cycle fatigue (HCF), and very high cycle fatigue (VHCF) mechanisms of aluminum alloys manufactured by selective laser melting. Manufacturing of hybrid structures by selective laser melting process is also investigated. Microstructural features were investigated for process-induced effects and the corresponding influence on quasistatic and fatigue properties. The microstructural features can be controlled in the selective laser melting process for required properties. Joining strengths in hybrid structures can be improved by post process heat-treatments. Material constants in different fatigue regions were determined, and higher fatigue strength of hybrid alloys was achieved in HCF as well as VHCF regimes.
Bibliography:ObjectType-Article-1
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ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2017.314