Plastic flow of a tungsten-based composite under quasi-static compression

Journal Article · Wed Sep 01 04:00:00 EDT 1993 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(93)90140-N· OSTI ID:6269073

Bao, G; Ramesh, K T ^[1]

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1. Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Mechanical Engineering

A micromechanics study is carried out on the plastic flow of a tungsten heavy alloy under uniaxial compression. The alloy--composed of a continuous tungsten phase in a tungsten-nickel-iron matrix--is modeled as a dual-phase composite, with the tungsten phase approximated by aligned, uniformly distributed and equal-sized particles. The stress-strain behavior of each phase is assumed to be power-law hardening of the Ramberg-Osgood type. Stress-strain curves of the composite under uniaxial compression are computed numerically using several cell models representing different tungsten particle shapes. It is found that the overall stress-strain behavior of the composite is essentially independent of the particle shape. However, the character of the local plastic deformation changes dramatically with the inclusion geometry. Two simple formulae are given that approximate the overall flow behavior of the composite in terms of the tungsten volume fraction and the behavior of the individual phases.

• OSTI ID: 6269073
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 41:9; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
COMPRESSION
DATA
DEFORMATION
GRAIN SIZE
INFORMATION
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NUMERICAL DATA
NUMERICAL SOLUTION
PLASTICITY
SIZE
STRAINS
STRESSES
THEORETICAL DATA
TUNGSTEN ALLOYS
TUNGSTEN BASE ALLOYS