Publication detail

Microstructural changes of magnesium alloy AZ91 during thermal exposure

ŠTĚPÁNEK, R. PANTĚLEJEV, L. MAN, O.

Original Title

Microstructural changes of magnesium alloy AZ91 during thermal exposure

English Title

Microstructural changes of magnesium alloy AZ91 during thermal exposure

Type

conference paper

Language

en

Original Abstract

In this paper the influence of annealing temperature on selected microstructural characteristics of fine-grained magnesium alloy AZ91 was studied. The changes in ratio between low angle boundaries (LAB) and high angle boundaries (HAB), kernel average misorientation (KAM) parameter and changes in average grain size during isochronal annealing (30 minutes) were analyzed. It was found that average grain size remains almost unchanged bellow 350 °C. Temperature increase above 350 °C led to substantial grain coarsening. During thermal exposure at any temperature changes in ratio between LAB and HAB and also in KAM parameter was found. It was found that these changes are rather dependent on the nature of initial microstructure than on annealing temperature level.

English abstract

In this paper the influence of annealing temperature on selected microstructural characteristics of fine-grained magnesium alloy AZ91 was studied. The changes in ratio between low angle boundaries (LAB) and high angle boundaries (HAB), kernel average misorientation (KAM) parameter and changes in average grain size during isochronal annealing (30 minutes) were analyzed. It was found that average grain size remains almost unchanged bellow 350 °C. Temperature increase above 350 °C led to substantial grain coarsening. During thermal exposure at any temperature changes in ratio between LAB and HAB and also in KAM parameter was found. It was found that these changes are rather dependent on the nature of initial microstructure than on annealing temperature level.

Keywords

Microstructural stability; AZ91; equal channel angular pressing; angle boundary misorientation; kernel average misorientation

RIV year

2015

Released

28.05.2015

ISBN

978-80-214-5146-9

Book

Multi-scale design of advanced materials

Pages from

36

Pages to

41

Pages count

6

Documents

BibTex


@inproceedings{BUT114791,
  author="Roman {Štěpánek} and Libor {Pantělejev} and Ondřej {Man}",
  title="Microstructural changes of magnesium alloy AZ91 during thermal exposure",
  annote="In this paper the influence of annealing temperature on selected microstructural characteristics of fine-grained
magnesium alloy AZ91 was studied. The changes in ratio between low angle boundaries (LAB) and high angle
boundaries (HAB), kernel average misorientation (KAM) parameter and changes in average grain size during
isochronal annealing (30 minutes) were analyzed. It was found that average grain size remains almost
unchanged bellow 350 °C. Temperature increase above 350 °C led to substantial grain coarsening. During 
thermal exposure at any temperature changes in ratio between LAB and HAB and also in KAM parameter was
found. It was found that these changes are rather dependent on the nature of initial microstructure than on
annealing temperature level.",
  booktitle="Multi-scale design of advanced materials",
  chapter="114791",
  howpublished="electronic, physical medium",
  year="2015",
  month="may",
  pages="36--41",
  type="conference paper"
}