Publication detail

Influence of processing on microstructure and mechanical properties of magnesium alloy AZ91

PANTĚLEJEV, L. ŠTĚPÁNEK, R.

English title

Influence of processing on microstructure and mechanical properties of magnesium alloy AZ91

Type

journal article - other

Language

en

Original abstract

This paper deals with differences of mechanical characteristics and fracture surface morphology of AZ91 magnesium alloy in extruded state and after subsequent equal channel angular pressing (ECAP). According to the results, the tensile properties were not controlled by grain size only as values of the tensile strength and 0.2 proof stress were similar for both alloys despite having average grain size 15.9 μm for the extruded alloy and 1.2 μm for the ECAPed alloy. In contrast, microhardness seemed to be dependent solely on the grain size. Fractographic analysis has shown changes in the damage mode from quasi-cleavage fracture in extruded state to rather ductile fracture with dimple morphology in exECAPed state during tensile loading.

English abstract

This paper deals with differences of mechanical characteristics and fracture surface morphology of AZ91 magnesium alloy in extruded state and after subsequent equal channel angular pressing (ECAP). According to the results, the tensile properties were not controlled by grain size only as values of the tensile strength and 0.2 proof stress were similar for both alloys despite having average grain size 15.9 μm for the extruded alloy and 1.2 μm for the ECAPed alloy. In contrast, microhardness seemed to be dependent solely on the grain size. Fractographic analysis has shown changes in the damage mode from quasi-cleavage fracture in extruded state to rather ductile fracture with dimple morphology in exECAPed state during tensile loading.

Keywords in English

AZ91, Microstructure, ECAP, Mechanical properties, Fracture behaviour

Released

12.06.2016

Publisher

University of Žilina

Location

žilina, Slovensko

ISSN

1335-0803

Volume

23

Number

1

Pages from–to

27–32

Pages count

6

BIBTEX


@article{BUT126157,
  author="Libor {Pantělejev} and Roman {Štěpánek},
  title="Influence of processing on microstructure and mechanical properties of magnesium alloy AZ91",
  year="2016",
  volume="23",
  number="1",
  month="June",
  pages="27--32",
  publisher="University of Žilina",
  address="žilina, Slovensko",
  issn="1335-0803"
}