Effect of Size on Tensile Strength of Fine Polycrystalline Nickel Wires

Abstract

Small-diameter (250 to 10 microns) polycrystalline nickel wires were prepared from single crystals and tested to relate tensile properties to wire size. Four conditions were tested: cold-drawn; drawn and electropolished; drawn and recrystallized; and drawn, recrystallized, and electropolished. The drawn wires were tested as a function of wire diameter, and recrystallized wires were tested at two grain sizes. The 0.2 percent yield strengths and tensile strengths of cold-drawn wires varied inversely as the square root of wire diameter. The tensile strength of recrystallized wires was diameter independent. The proportional limit stress of recrystallized wires was inversely related to power functions of wire diameter and grain size. This relation can be expressed by a modified Hall-Petch equation.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1966
Accession Number
ADA382553

Entities

People

  • Lester S. Rubenstein

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Cells
  • Composite Materials
  • Crystal Structure
  • Crystals
  • Impurities
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Polycrystals
  • Single Crystals
  • Stresses
  • Tensile Properties
  • Tensile Strength
  • Tensile Testing
  • Yield Strength

Readers

  • Electrical Engineering
  • Materials Science (Mechanical Engineering).
  • Regression Analysis.