A micromechanical viscoplastic stress-strain model with grain boundary sliding

Technical Report · Mon Jan 01 04:00:00 EST 1990

OSTI ID:5149314

Jordan, E H ^[1]

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1. Connecticut Univ., Storrs, CT (USA). Dept. of Mechanical Engineering

A project has been initiated on 4/15/88 titled A Micromechanics Viscoplastic Stress-Strain Model with Grain Boundary Sliding'' (DF-FG02-88ER13894). Progress made during the second year (4/15/89-10/15/89) is presented in this report. The goal of the project is the construction and verification of a visco-plastic stress-strain behavior model of a polycrystalline metal where the polycrystalline behavior is derived from single crystal behavior in a manner that accounts for the interaction of differently oriented grains and the single crystal model is derived from postulated slip behavior on individual slip systems. Included in the model will be representation of grain boundary slip. A vital aspect of the project will be the direct verification of the model by doing tests on single crystals to determine actual stress strain-time behavior and use that data to determine the constants describing the single crystal behavior. The knowledge of the single crystal behavior will then be used to predict the polycrystalline behavior. This prediction will be critically tested using additional data on the polycrystalline behavior of the same metal.

• Research Organization: Connecticut Univ., Storrs, CT (USA). Dept. of Mechanical Engineering
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-88ER13894
• OSTI ID: 5149314
• Report Number(s): DOE/ER/13894-2; ON: DE90006013
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
CRYSTAL STRUCTURE
CRYSTALS
DOCUMENT TYPES
ELEMENTS
GRAIN BOUNDARIES
HARDENING
MATHEMATICAL MODELS
METALS
MICROSTRUCTURE
POLYCRYSTALS
PROGRESS REPORT
STRAIN RATE