Microstructure and Mechanical Properties of Ultrafine-Grained Magnesium AZ91 Alloy

Stanislava Fintová; Libor Pantělejev; Ludvík Kunz

doi:10.4028/www.scientific.net/MSF.782.384

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HomeMaterials Science ForumMaterials Science Forum Vol. 782Microstructure and Mechanical Properties of...

Microstructure and Mechanical Properties of Ultrafine-Grained Magnesium AZ91 Alloy

Abstract:

Microstructure, mechanical properties, cyclic plastic deformation behavior and fatigue strength of ultrafine-grained (UFG) magnesium alloy AZ91 processed by equal channel angular pressing (ECAP) were investigated. ECAP of originally cast alloy results in development of bimodal structure, improved yield stress, tensile strength and ductility when compared to the as-cast state. Endurance limit based on 10⁷ cycles is also improved, however exhibits large scatter. Initiation of fatigue cracks takes place in regions of large grains in the bimodal structure, where the content of Mg₁₇Al₁₂ particles is low.

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Periodical:

Materials Science Forum (Volume 782)

Pages:

384-389

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.782.384

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Online since:

April 2014

Authors:

Stanislava Fintová*, Libor Pantělejev, Ludvík Kunz

Keywords:

AZ91, Cyclic Plastic Deformation, ECAP, Fatigue Crack Initiation, Mechanical Property, Microstructure

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* - Corresponding Author

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