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Title:A Numerical Study of Intergranular and Oxidation-Driven Fracture in an Elastic-Viscoplastic Material
Author(s):Carranza, Fernando L.
Doctoral Committee Chair(s):Haber, Robert B.
Department / Program:Theoretical and Applied Mechanics
Discipline:Theoretical and Applied Mechanics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Mechanical
Abstract:This study focuses on one mechanism that is believed to be important in the fatigue response of high-temperature superalloys: intergranular fracture driven by the infiltration and embrittlement of grain boundaries by oxygen. A novel space-time finite element model is developed to study this mechanism. The numerical model provides the basis for generic investigations of the kinetics of quasi-static crack growth along a brittle interface (such as an oxidized grain boundary) embedded in an elastic-viscoplastic material. Additional studies illuminate the complex interactions between stress-assisted grain-boundary diffusion, inelastic material response and grain-boundary cleavage.
Issue Date:1997
Description:115 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1997.
Other Identifier(s):(MiAaPQ)AAI9812547
Date Available in IDEALS:2015-09-28
Date Deposited:1997

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