Hiroaki Rikihisa, Takashi Mori, M. Tsushida, H. Kitahara, S. Ando
{"title":"Influence of Yttrium Addition on Plastic Deformation of Magnesium","authors":"Hiroaki Rikihisa, Takashi Mori, M. Tsushida, H. Kitahara, S. Ando","doi":"10.2320/JINSTMET.J2017016","DOIUrl":null,"url":null,"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 <c + a> slip systems and a relationship between ductility of magnesium and active <c + a> 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 <c + a> 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 ]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"15","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Japan Institute of Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.2320/JINSTMET.J2017016","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
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 ]