Analysis of the interfacial stresses produced by a pile-up of discrete edge dislocations in two phase materials

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(87)90124-6· OSTI ID:5650679

Ovecoglu, M L; Barnett, D M; Nix, W D

The local stresses associated with a pile-up of discrete edge dislocations against a welded interface at a second phase have been calculated using the elasticity solution of Dundurs. The calculations permit a study of the effects of applied stress, pile-up length, and the elastic properties of the two phases on the distribution of dislocations in the pile-up and on the stresses at the interface. The equilibrium positions of the dislocations and their discrete contributions to the stresses at the interface have been investigated for cases in which the shear modulus of the second phase is greater than and less than (or equal to) that of the matrix. The local stress increases with applied stress and pile-up length. For a given applied stress and pile-up length, the stresses increase with decreasing shear modulus of the second phase and also depend on the Poisson's ratios of the two phases. The analysis is used to study the effects of microstructure on the plastic deformation of two-phase alloys.

• Research Organization: Dept. of Materials Science and Engineering, Stanford Univ., Stanford, CA 94305
• OSTI ID: 5650679
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 35:7; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DISLOCATIONS
EDGE DISLOCATIONS
ELASTICITY
FABRICATION
INTERFACES
JOINING
JOINTS
LINE DEFECTS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PLASTICITY
POISSON RATIO
SHEAR
STRESS ANALYSIS
STRUCTURAL CHEMICAL ANALYSIS
TENSILE PROPERTIES
WELDED JOINTS
WELDING