A dislocation density based material model to simulate the anisotropic creep behavior of single-phase and two-phase single crystals

Autor:	Holger Brehm, Johannes Preußner, Uwe Glatzel, Rainer Völkl, Yegor Rudnik
Přispěvatelé:	Publica
Rok vydání:	2009
Předmět:	Dislocation creep Materials science Condensed matter physics Mechanical Engineering Slip (materials science) Microstructure Crystal Superalloy Condensed Matter::Materials Science Crystallography Creep Mechanics of Materials General Materials Science Dislocation Anisotropy
Zdroj:	International Journal of Plasticity. 25:973-994
ISSN:	0749-6419
DOI:	10.1016/j.ijplas.2008.04.006
Popis:	The primary and secondary creep behavior of single crystals is observed by a material model using evolution equations for dislocation densities on individual slip systems. An interaction matrix defines the mutual influence of dislocation densities on different glide systems. Face-centered cubic (fcc), body-centered cubic (bcc) and hexagonal closed packed (hcp) lattice structures have been investigated. The material model is implemented in a finite element method to analyze the orientation dependent creep behavior of two-phase single crystals. Three finite element models are introduced to simulate creep of a γ′ strengthened nickel base superalloy in 〈1 0 0〉, 〈1 1 0〉 and 〈1 1 1〉 directions. This approach allows to examine the influence of crystal slip and cuboidal microstructure on the deformation process.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dd309b4865fd0a54f639b1536f9d835 https://doi.org/10.1016/j.ijplas.2008.04.006 Zobrazit plný text záznamu Full Text from ScienceDirect