Hall-Petch parameters for tension and compression in cast Mg

P. Andersson; C. H. Cáceres; J. Koike

doi:10.4028/www.scientific.net/msf.419-422.123

Hall-Petch parameters for tension and compression in cast Mg

P. Andersson, C. H. Cáceres, J. Koike

ENG - Materials Science

Research output: Contribution to journal › Conference article › peer-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, σ_y, (MPa), varies with the grain size, d (m), as σ_y = 17.7 + 0.25 d^-1/2 in tension, while σ_y, = -2.3 + 0.39 d^-1/2 in compression. Possible reasons for the difference between tension and compression are discussed.

Original language	English
Pages (from-to)	123-128
Number of pages	6
Journal	Materials Science Forum
Volume	419-422
Issue number	I
DOIs	https://doi.org/10.4028/www.scientific.net/msf.419-422.123
Publication status	Published - 2003
Event	Proceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003 - Osaka, Japan Duration: 2003 Jan 26 → 2003 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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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.",

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AU - Andersson, P.

AU - Cáceres, C. H.

AU - Koike, J.

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N2 - 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.

AB - 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.

KW - Grain size

KW - Hall-Petch relationship

KW - Magnesium

KW - Yield stress

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