日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 77, No. 10 (2013),
pp. 466-472

Pure-Shear Test for Investigation of Non-Basal Slip System Operation of Mg Alloy Single Crystal with and without Y

Takahiro Mineta1, Seiji Miura2, Toshiji Mukai3, Mikito Ueda2 and Tetsuo Mohri4

1Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628
2Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628
3Department of Mechanical Engineering, Graduate School of Engineering, Kobe University, Kobe 657-8501
4Center for Computational Materials Science, Institute for Materials Research, Tohoku University, Sendai 980-8577

Abstract:

In Mg alloys, the most favorable deformation mechanism is the basal slip, and extension twinning also contributes to plastic deformation. Other mechanisms such as prismatic slips, pyramidal slips and twinning except for extension twinning scarcely occur. However, these slip systems also contribute to the plastic deformation of poly crystal Mg alloys, so the determination of CRSS of such non-basal slip systems are inevitable as a basis for the prediction of the deformation behavior of poly-crystal Mg alloys. Because of the difficulty of the evaluation of CRSS for non-basal slip by conventional compression test, newly designed ``Pure shear test'' is applied to evaluate the CRSS of the prismatic slip Mg alloy single crystals containing Y. Also a modification of Bridgman method using LiF+LiCl is attempted to obtain a pure-Mg single crystal. [doi:10.2320/jinstmet.JAW201308]


(Received 2013/4/25)

Keywords:

magnesium alloy, non-basal slip system, prismatic slip, twinning, single crystal, critical resolved shear stress (CRSS)


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