High-Temperature Creep of Nb–Si In Situ Composites

Autor:	D. V. Zaitsev, I. L. Svetlov, Yu. V. Artemenko, T. S. Stroganova, M. I. Karpov
Rok vydání:	2020
Předmět:	In situ Materials science 020502 materials Stress dependence Lüders band Metals and Alloys 02 engineering and technology 0205 materials engineering Creep Residual strain Exponent Composite material Dislocation Directional solidification
Zdroj:	Russian Metallurgy (Metally). 2020:396-400
ISSN:	1555-6255 0036-0295
DOI:	10.1134/s0036029520040308
Popis:	An Nb–Si–X (X = Ti, Mo, Hf, Zr, Al, Cr) in situ composite material with the structure formed by directional solidification is subjected o creep tests during tension in vacuum at a temperature of 1300°C. The creep strength at a residual strain tolerance of 1% in 100 h $$\left( {\sigma _{{1/100}}^{{1300}}} \right) = 24\,\,{\text{MPa}}$$ and the exponent in the stress dependence of the steady-state creep rate $${{\dot {\varepsilon }}_{{\text{c}}}}$$ = Aσ n (n = 2.35) are determined. The creep of the composite material under the experimental conditions is shown to occur via a dislocation mechanism fully or partly, since dislocation networks in the matrix and silicides and dislocations in slip bands are observed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c380e4a76b48029a067a1729a68280d7 https://doi.org/10.1134/s0036029520040308 Zobrazit plný text záznamu Full text from SpringerLink