A Study of the Mechanical Behavior of OFHC Copper in Tension at Various Strain Rates and Heating Rates Using the Two-Dimensional Integrated Speckle Measuring System

Abstract

The objective was to investigate the mechanical behavior of oxygen-free high-conductivity (OFHC) copper in tension. A modified dog bone specimen was heated using resistive heating techniques. The effects of high temperature, medium strain rates, and high heating rates on the stress-strain results were observed. A new two-dimensional (2-D) integrated speckle measuring system and a high-speed optical pyrometer were utilized for strain and temperature measurements. Room temperature tests were conducted at strain rates of quasi-static and 1/s. The high heating rate experiments were conducted at temperatures of 360 deg C and 375 deg C, heating rates of 30 degrees C/s and 263 degrees C/s, and at a strain rate of 1/s. A nominal decrease in the elastic modulus and an increase in the elastic limit are seen for increasing strain rate. Decreases in yield stress and flow stress were observed as the heating rate was increased.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2000
Accession Number
ADA379804

Entities

People

  • Brian G. Durant
  • Nathaniel D. Bruchey

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Charge Coupled Devices
  • Computers
  • Crystal Structure
  • Digital Images
  • Fungi
  • Geometry
  • High Temperature
  • Measurement
  • Mechanical Properties
  • Modulus Of Elasticity
  • Optical Pyrometers
  • Physical Properties
  • Pyrometers
  • Stress Strain Relations
  • Stresses
  • Test Facilities
  • Two Dimensional

Readers

  • Powder metallurgy of Titanium alloys.
  • Structural Dynamics.
  • Thermal Physics or Thermal Science.