Hall-Petch parameters for tension and compression in cast Mg

P. Andersson, C. H. Cáceres, J. Koike

Research output: Contribution to journalConference articlepeer-review

72 Citations (Scopus)

Abstract

The flow stress in tensile and compressive deformation has been determined in cast Mg, for a wide range of grain sizes between 36 μm and 1.5 mm. The grain size was varied by alloying Mg with small amounts of Zr. It was found that the 0.2% offset flow stress, σy, (MPa), varies with the grain size, d (m), as σy = 17.7 + 0.25 d-1/2 in tension, while σy, = -2.3 + 0.39 d-1/2 in compression. Possible reasons for the difference between tension and compression are discussed.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalMaterials Science Forum
Volume419-422
Issue numberI
DOIs
Publication statusPublished - 2003
EventProceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003 - Osaka, Japan
Duration: 2003 Jan 262003 Jan 30

Keywords

  • Grain size
  • Hall-Petch relationship
  • Magnesium
  • Yield stress

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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