Brittle transcrystalline and intercrystalline fracture in polycrystalline fcc-metal (iridium) / Panfilov P,Yermakov A // . - 2002. - V. , l. . - P. 229-234.

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Type:

Proceedings Paper

Abstract:

Fracture behavior of high pure polycrystalline iridium and iridium, where grain boundaries have been contaminated, is considered. Mixture of brittle transcrystalline and brittle intercrystalline fracture, where portion of the last depends on grain size, is the inherent fracture mode of this refractory fcc-metal (T-melt=2443degreesC). 100\% brittle intercrystalline fracture of fine grain aggregate means impurities induced fracture of iridium. At that high pure metal exhibits poor plasticity and brittle fracture under tensile stress only, while contaminated polycrystalline one is unworkable material. Another word ``inherent brittleness{''} is specific property of iridium, which contrasts with brittle fracture behavior of crystal when it could not be deformable solid. Physical mechanisms of brittle transcrystalline fracture and grain boundaries brittleness in polycrystalline iridium are discussed.

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Web of Science ID:

ISI:000179009400030

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Другие поля

Поле	Значение
Editor	Soboyejo, WO and Lewandowski, JJ and Ritchie, RO
Booktitle	MECHANISMS AND MECHANICS OF FRACTURE: THE JOHN KNOTT SYMPOSIUM
Note	John Knott Symposium on Mechanisms and Mechanics of Fracture, COLUMBUS, OH, OCT 07-10, 2002
Organization	Minerals, Met \& Mat Soc, Struct Mat Comm, Struct Mat Div
Publisher	MINERALS, METALS \& MATERIALS SOC
Address	184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA
Language	English
ISBN	0-87339-528-X
Research-Areas	Mechanics; Metallurgy \& Metallurgical Engineering; Materials Science
Web-of-Science-Categories	Mechanics; Metallurgy \& Metallurgical Engineering; Materials Science, Characterization \& Testing; Materials Science, Coatings \& Films
ORCID-Numbers	Panfilov, Peter/0000-0001-9068-049X
Number-of-Cited-References	24
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	2
Doc-Delivery-Number	BV44U