Influence of stress relieving thermal cycles on AISI10Mg specimens produced by selective laser melting

The AlSi10Mg alloy is known for its castability, corrosion resistance, high heat conductivity, low weight and good weldability. Applications of the aluminium alloy components includes heat exchangers that are subjected to high temperatures and corrosive environments. The production process of AlSi10...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-10, Vol.655 (1), p.12027
Main Authors: Mfusi, B J, Mathe, N R, Popoola, P A I, Tshabalala, L C
Format: Article
Language:English
Subjects:
Aluminum base alloys
Castability
Corrosion resistance
Corrosion resistant alloys
Fatigue strength
Heat exchangers
Heat treatment
High temperature
Laser beam melting
Laser beam welding
Lasers
Rapid prototyping
Silicon
Stress relieving
Tensile properties
Thermal conductivity
Thermodynamic properties
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Summary:The AlSi10Mg alloy is known for its castability, corrosion resistance, high heat conductivity, low weight and good weldability. Applications of the aluminium alloy components includes heat exchangers that are subjected to high temperatures and corrosive environments. The production process of AlSi10Mg alloy using selective laser melting has been extensively explored because of its hypoeutectic composition of Al and Si. However, it has been observed that stress relieve has a negative consequence on tensile properties of SLM built samples, while retaining and improving ductility. The thermal behaviour of AlSi10Mg alloy fabricated by selective laser melting with the specimen heat treated at 300°C for 2 hours investigated in this work. The specimens exhibited mass gain during the thermalgravimetric analysis as a result of the precence of oxygen as one of the elements present as detected by the elemental analysis. The fatigue results post thermal treatment demonstrated improved fatigue resistance qualities comparable to die-casted AlSi10Mg.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/655/1/012027