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Abnormal medial rectus insertion presenting exotropia:a case report and review of the literature

International Journal of Ophthalmology(English edition) 2016年第12期9卷 1852-1854页

作者： Heeyoung Choi hyunkyu kim Hyeshin Jeon Department of Ophthalmology Pusan National University Hospital Medical Research Institute Pusan National University Hospital

I am Dr. Heeyoung Choi, from the Department of Ophthalmology of Pusan National University Hospital,Busan, Korea. I write to present a case report of abnormal medial rectus insertion presenting exotropia.

关键词： case Abnormal medial rectus insertion presenting exotropia length Figure

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Effect of Ca addition on the microstructure and mechanical properties of heat-treated Mg-6.0Zn-1.2Y-0.7Zr alloy

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Journal of Magnesium and Alloys 2021年第5期9卷 1636-1648页

作者： Young Gil Jung Wonseok Yang Yong Joo kim Shae.K.kim Young Ok Yoon hyunkyu Lim Do Hyang kim Advanced Materials and Process R&D Department Korea Institute of Industrial Technology156Gaetbeol-roIncheon 21999Republic of Korea Department of Metallurgical Engineering Yonsei University50Yonsei-roSeoulSeodaemun-gu 03722Republic of Korea

In this study,the effects of Ca addition on the microstructure,thermal properties,and mechanical properties of a Mg-6.0Zn-1.2Y-0.7Zr(ZWK611)alloy at room temperature and 150℃ were *** an increase in the Ca content,the ignition resistance of the ZWK611 alloy improved and the grains became *** as-cast ZWK611 alloy consisted mainly of the dendriticα-Mg matrix and I-phase(Mg_(3)Zn_(6)Y)at the grain *** the other hand,theτ-(Ca_(2)Mg_(6)Zn_(3))and I-phases were formed in the Ca-added ZWK611 *** fraction of theτ-phase increased with an increase in the Ca *** the solid-solution treatment,these phases remained partially at the grain boundaries of the Ca-added ZWK611 alloys and an additional W-phase(Mg_(3)Zn_(3)Y)was *** phases remaining at the grain boundaries restricted the grain growth through the grain boundary pinning *** aging treatment resulted in the formation of MgZn'precipitates in theα-Mg matrix of the *** precipitates were more uniformly distributed in the Ca-added alloys than in the alloys without ***,the heat treatment-induced precipitation improved the tensile and creep properties of the T6-treated *** T6-treated ZWK611+0.7Ca alloy exhibited the best mechanical properties at room temperature and 150℃ among all the tested alloys.

关键词： Mg-Zn-Y alloys Heat-treatment Precipitate Mechanical properties Thermal analysis

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