Publication detail

Microstructure and mechanical properties of ultrafine-grained magnesium AZ91 alloy

FINTOVÁ, S. PANTĚLEJEV, L. KUNZ, L.

Original Title

Microstructure and mechanical properties of ultrafine-grained magnesium AZ91 alloy

English Title

Microstructure and mechanical properties of ultrafine-grained magnesium AZ91 alloy

Type

conference paper

Language

en

Original 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.

English 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.

Keywords

AZ91, ECAP, microstructure, mechanical properties, cyclic plastic deformation, fatigue crack initiation

RIV year

2014

Released

09.04.2014

Publisher

Thomas Wohlbier, TTP USA

Location

Switzerland

ISBN

9783038350729

Book

Metallography XV

Pages from

384

Pages to

389

Pages count

6

BibTex


@inproceedings{BUT106214,
  author="Stanislava {Fintová} and Libor {Pantělejev} and Ludvík {Kunz}",
  title="Microstructure and mechanical properties of ultrafine-grained magnesium AZ91 alloy",
  annote="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.",
  address="Thomas Wohlbier, TTP USA",
  booktitle="Metallography XV",
  chapter="106214",
  doi="10.4028/www.scientific.net/MSF.782.384",
  howpublished="print",
  institution="Thomas Wohlbier, TTP USA",
  number="1",
  year="2014",
  month="april",
  pages="384--389",
  publisher="Thomas Wohlbier, TTP USA",
  type="conference paper"
}