Effect of Structural Relaxation on Deformation Behaviour of Zr-Based Metallic Glass

Autor:	LI Wei-Huo, Xing Dong-Mei, Wei Bing-Chen, Zhang Ling-chen, Liu Yuan, Zhang Taihua
Rok vydání:	2006
Předmět:	Serration Materials science Differential scanning calorimetry Amorphous metal General Physics and Astronomy Relaxation (physics) Composite material Nanoindentation Deformation (engineering) Glass transition Annealing (glass)
Zdroj:	Chinese Physics Letters. 23:1868-1871
ISSN:	1741-3540 0256-307X
DOI:	10.1088/0256-307x/23/7/059
Popis:	Structural relaxation through isothermal annealing at temperature below glass transition is conducted on Zr46.75Ti8.25Cu7.5Ni10Be27.5 (Vitreloy-4) bulk metallic glass. Defect concentration is correlated with the annealing time t according to differential scanning calorimetry thermalgrams. The effects of structural relaxation on mechanical properties and deformation behaviour are investigated by using instrumented nanoindentation. It is found that the as-cast alloy exhibits pronounced serration flow during the loading process of nanoindentation, and the size and number of the serrations decrease with the annealing time. The change of the deformation behaviour with structural relaxation is explained using a free volume model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9fecbb00c982c0b222cdfab4ecd6f23b https://doi.org/10.1088/0256-307x/23/7/059 Zobrazit plný text záznamu