Influence of Yttrium Addition on Plastic Deformation of Magnesium

IF 0.5 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Journal of The Japan Institute of Metals Pub Date : 2017-12-01 DOI:10.2320/JINSTMET.J2017016

Hiroaki Rikihisa, Takashi Mori, M. Tsushida, H. Kitahara, S. Ando

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引用次数: 15

Abstract

In this study, tensile tests of Mg - Y alloy single crystals and polycrystals were carried out to investigate inﬂuence of yttrium on activities of slip systems and a relationship between ductility of magnesium and active slip systems. Tensile directions of the single crystals and the polycrystals were parallel to （ 0001 ） and its rolling direction, respectively. Both tests were carried out at room temperature. Yield stress and ductility of Mg -（ 0 . 6 - 1 . 1 ） at ％ Y alloy single crystals were higher than that of pure Mg and the crystals were yielded due to ﬁrst order pyramidal slip （ FPCS ） . Mg - 0 . 9 at ％ Y alloy polycrystals showed higher ductility than pure Mg. The number of grains in which second order pyramidal slip can be activated was larger than that of non - basal slips in pure Mg, while the number for FPCS was increased with increasing strain in Mg - 0 . 9 at ％ Y alloy. We supposed that high ductil - ity of Mg - 0 . 9 at ％ Y alloy would be caused activation of FPCS by yttrium addition. ［ doi:10 . 2320 / jinstmet.J2017016 ］

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添加钇对镁塑性变形的影响

本研究通过对Mg - Y合金单晶和多晶的拉伸试验，探讨了钇元素对滑移体系活性的影响，以及镁元素的延展性与滑移体系的关系。单晶和多晶的拉伸方向分别平行于(0001)及其轧制方向。两项试验均在室温下进行。Mg -(0)的屈服应力和塑性。6比1。1)与纯Mg相比，at % Y合金单晶含量更高，单晶是由于一阶锥体滑移(FPCS)产生的。Mg - 0。9at % Y合金多晶具有比纯Mg更高的延展性。在Mg - 0中，二级锥体滑移激活的晶粒数量大于非基滑移激活的晶粒数量，而FPCS的数量随着应变的增加而增加。9at % Y合金。我们假设Mg - 0的高延展性。添加钇会引起FPCS的活化。[doi:10]2320 / jinstmet。J2017016]

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