Influence of Mn content on mechanical properties and fatigue behavior of extruded Mg alloys

Sabrina Alam Khan, Yukio Miyashita, Yoshiharu Mutoh, Zainuddin Sajuri

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Effect of manganese addition, which has been known to improve formability during extrusion, on mechanical properties and fatigue strength was investigated to confirm the total performance of the Mn addition to the magnesium alloys. The grain size decreased with increasing Mn content and attained a constant grain size at the Mn contents higher than 0.4 wt%, where the Mn-Al-Mg intermetallic particles were precipitated. The tensile strength and hardness increased with increasing Mn content and attained a constant value at the Mn contents higher than 0.4 wt%, which was consistent with the grain size variation. The fatigue life increased with increasing Mn content and attained a constant value similar to the case of tensile strength. However, the fatigue life was significantly reduced at the Mn content of 0.79 wt%. It is speculated to result from a large number of precipitated intermetallic particles, which would degrade the fatigue crack growth resistance. The magnesium alloys with Mn contents between 0.4 and 0.6 wt% have a good balance of mechanical properties and fatigue strength.

Original languageEnglish
Pages (from-to)315-321
Number of pages7
JournalMaterials Science and Engineering A
Volume420
Issue number1-2
DOIs
Publication statusPublished - 25 Mar 2006

Fingerprint

Magnesium alloys
Intermetallics
Tensile strength
Fatigue of materials
mechanical properties
Mechanical properties
Formability
Manganese
Fatigue crack propagation
Extrusion
Hardness
grain size
fatigue life
magnesium alloys
tensile strength
intermetallics
Fatigue strength
manganese
hardness
cracks

Keywords

  • Crack nucleation
  • Fatigue
  • Intermetallic particle
  • Magnesium alloy
  • Mn content

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Influence of Mn content on mechanical properties and fatigue behavior of extruded Mg alloys. / Khan, Sabrina Alam; Miyashita, Yukio; Mutoh, Yoshiharu; Sajuri, Zainuddin.

In: Materials Science and Engineering A, Vol. 420, No. 1-2, 25.03.2006, p. 315-321.

Research output: Contribution to journalArticle

Khan, Sabrina Alam ; Miyashita, Yukio ; Mutoh, Yoshiharu ; Sajuri, Zainuddin. / Influence of Mn content on mechanical properties and fatigue behavior of extruded Mg alloys. In: Materials Science and Engineering A. 2006 ; Vol. 420, No. 1-2. pp. 315-321.
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