Microstructure and mechanical behavior of an additive manufactured (AM) WE43-Mg alloy

Magnesium alloys are highly attractive in aerospace and auto industries due to their high strength-to-weight ratio. Additive manufacturing of Mg alloys can further save cost from materials and machining time. This paper investigates the microstructure and dynamic mechanical behavior of WE-43 Mg allo...

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Bibliographic Details
Published inAdditive manufacturing Vol. 26; pp. 53 - 64
Main Authors Gangireddy, Sindhura, Gwalani, Bharat, Liu, Kaimiao, Faierson, Eric J., Mishra, Rajiv S.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2019
Subjects
Dynamic mechanical response
Electron microscopy
Porosity
Powder bed fusion
WE-43 Mg alloy
WE-43 Mg alloy
Dynamic mechanical response
Powder bed fusion
Porosity
Electron microscopy
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Summary:Magnesium alloys are highly attractive in aerospace and auto industries due to their high strength-to-weight ratio. Additive manufacturing of Mg alloys can further save cost from materials and machining time. This paper investigates the microstructure and dynamic mechanical behavior of WE-43 Mg alloy built through the powder bed fusion process. Samples from four different combinations of processing parameters were built. These builds were studied in both as-built and hot isostatically pressed conditions. The resultant complex microstructures were studied under scanning and transmission electron microscopes while their dynamic mechanical behavior was evaluated using a split-Hopkinson pressure bar testing system. Effects of initial porosity and microstructural evolution during HIP treatment on mechanical response are discussed.
ISSN:2214-8604
2214-7810
DOI:10.1016/j.addma.2018.12.015