High Temperature Deformation Behavior and Microstructure Change in Nano-Grain Ti-SiC Composites

Autor:	Masayoshi Yoshimoto, Kei Ameyama, Yusuke Kumagai, Kazuo Isonishi, Naoki Miyano
Rok vydání:	2007
Předmět:	Materials science Mechanical Engineering Metallurgy Composite number Sintering Flow stress Deformation (meteorology) Condensed Matter Physics Microstructure Amorphous solid Mechanics of Materials Phase (matter) Nano General Materials Science Composite material
Zdroj:	Journal of the Society of Materials Science, Japan. 56:959-963
ISSN:	1880-7488 0514-5163
Popis:	Ti-SiC nano grain composite is produced by sintering process by using mechanical alloyed powder. Then, its high temperature transformation behavior and the microstructure change of non-equilibrium structures are investigated. TiC/Ti5Si3 powders of elements Ti and SiC whose composition is Ti-20mass%SiC are blended for mechanical alloying (MA). The MA powder whose average particle size is 20∼30μm, has an amorphous structure. The MA powder is compacted by cold compact compression machine for fabrication of a compression-test piece. As the results of the compression-test and TEM observations, it found that new phases were forming during the compression test, and the flow stress changed depending on the initial microstructure of a test piece. Especially, the existence of Ti3SiC2 and a SiC phase affected deformation resistance. Such a deformation behavior is attributed to a pseudo-superplasticity in the material, in which the phase transition of metastable microstructure occurs during the deformation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::220ff3a141098f5c80d02ea80cca62a1 https://doi.org/10.2472/jsms.56.959 Zobrazit plný text záznamu