Niobium/alumina bicrystal interface fracture

A. Siddiq, S. Schmauder, M. Rühle

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

In the presented work, an eort has been put to clear up the theoretical interlink between local adhesion capacity and macroscopic fracture energies by bridging dierent length scales, such as nano-, meso-, and macroscale.
Crystal plasticity theory along with a cohesive modelling approach has been used during this work. The inuence of dierent cohesive law parameters (cohesive strength, work of adhesion) on the macroscopic fracture energies for three dierent orientations of niobium/alumina bicrystal specimens has been presented. It is found that cohesive strength has a stronger eect on macroscopic
fracture energies as compared to work of adhesion. In the last part a generalized correlation among macro- scopic fracture energy, cohesive strength, work of adhesion and yield stress is derived. The presented results can provide a great help to experimentalists in order to design better metal/ceramic interfaces.
Original languageEnglish
Title of host publicationMultiscale Materials Modeling
Subtitle of host publicationApproaches to Full Multiscaling
EditorsSiegfried Schmauder, Immanuel Schäfer
PublisherWalter de Gruyter
Pages135–150
Number of pages16
ISBN (Electronic)9783110412451
DOIs
Publication statusPublished - 2016

Keywords

  • metal/ceramic interface
  • crystal plasticity
  • cohesive model
  • fracture mechanics
  • work of adhesion

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    Siddiq, A., Schmauder, S., & Rühle, M. (2016). Niobium/alumina bicrystal interface fracture. In S. Schmauder, & I. Schäfer (Eds.), Multiscale Materials Modeling : Approaches to Full Multiscaling (pp. 135–150). Walter de Gruyter. https://doi.org/10.1515/9783110412451-009