Effect of loading rate on fracture behaviour of Mg-Al-Zn alloys

Noradila Abdul Latif, Zainuddin Sajuri, Junaidi Syarif, Yukio Miyashita

Research output: Contribution to journalArticle

Abstract

In recent years, magnesium alloys are widely used for automotive applications as structural components due to its lightweight property and high specific strength. In this regards, magnesium alloys are subjected to high velocity and impact loads during accident. Hence, understanding the impact and dynamic behaviours of magnesium alloys are essential. In this study, the effect of loading rates on the fracture behaviour of Mg-Al-Zn alloys was investigated using pre-cracked single-edge notched bending (SENB) specimens. Three-point bending tests were conducted at different loading rates of 5, 50 and 500 mm/min. The Mg-Al-Zn alloys that used in the present study were extruded AZ31 and AZ61 magnesium alloys. From the load-load line displacement results, both alloys exhibited nonlinear fracture behaviour. The maximum load (Pmax) of these two alloys increased with increasing loading rate. Comparing both alloys, AZ61 exhibited higher Pmax than that of AZ31 due to the higher volume of β-phase and smaller grain size in AZ61. Fracture surface observation revealed that both alloys fractured in ductile manner with large scale yielding and high shear lips ratio at all loading rates.

Original languageEnglish
Pages (from-to)83-89
Number of pages7
JournalJurnal Teknologi
Volume78
Issue number6-9
DOIs
Publication statusPublished - 2016

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Magnesium alloys
Bending tests
Accidents

Keywords

  • Ductile
  • Elastic-plastic fracture
  • Loading rate
  • Mg-Al-Zn alloys
  • Three-point bending

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Effect of loading rate on fracture behaviour of Mg-Al-Zn alloys. / Latif, Noradila Abdul; Sajuri, Zainuddin; Syarif, Junaidi; Miyashita, Yukio.

In: Jurnal Teknologi, Vol. 78, No. 6-9, 2016, p. 83-89.

Research output: Contribution to journalArticle

Latif, Noradila Abdul ; Sajuri, Zainuddin ; Syarif, Junaidi ; Miyashita, Yukio. / Effect of loading rate on fracture behaviour of Mg-Al-Zn alloys. In: Jurnal Teknologi. 2016 ; Vol. 78, No. 6-9. pp. 83-89.
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