Microstructures and mechanical properties of quasicrystal reinforced Mg matrix composites

Autor:	Yingbo Zhang, Yulai Song, Xian-yong Zhu, Sirong Yu
Rok vydání:	2008
Předmět:	Materials science Mechanical Engineering Metal matrix composite Metals and Alloys Quasicrystal Microstructure Grain size Mechanics of Materials Ultimate tensile strength Materials Chemistry Lamellar structure Composite material Tensile testing Eutectic system
Zdroj:	Journal of Alloys and Compounds. 464:575-579
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2007.10.052
Popis:	Mg-based composites reinforced with stable in situ icosahedral quasicrystal phase (I-phase) were fabricated in this study. The effects of Y content on the microstructures and mechanical properties of the composites were investigated. The results show that the composites comprised dendrites of α-Mg matrix separated by interdendritic I-phase and lamellar (I-phase + α-Mg) eutectic. With the increase of Y content, the content of I-phase increases; the content and size of (I-phase + α-Mg) eutectic cell increase; the lamellar space between I-phase and α-Mg in eutectic cell also increases; but the grain size of α-Mg matrix decreases. The failure mode of Mg–Zn–Y alloy matrix composites in tensile tests is quasi-cleavage fracture. With the increase of Y content, the tensile strengths of the composites increase, and the elongation rates increase firstly and then decrease.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::06caec9f3251ea14e2e32857eea7acb1 https://doi.org/10.1016/j.jallcom.2007.10.052 Zobrazit plný text záznamu Full Text from ScienceDirect