Strain Resistivity at 4.2 K in Pure Aluminum Conference Paper uri icon

abstract

  • Strain induced resistivity increases are examined in pure aluminum under conditions of uniaxial tensile and compressive stress at 4. 2 K. Metal studied has an annealed residual resistivity ratio (RRR equals rho //2//7//3//K/ rho //4//. //2//K) covering the range 150-7100, is in some cases work hardened prior to testing, and is strained to levels below 10%. Resistivity is monitored during strain by eddy current coils located directly over strain gages bonded to centimeter diameter specimens. We find strain-resistivity to be slightly dependent on purity and similar for tension and compression. For all cases the empirical expression DELTA rho equals A ( epsilon //p)**B holds for plastic strains ( epsilon //p) above about 0. 1% where A and B are constants. Values of B group around 1. 5 for annealed metal and decrease to near 1. 15 for the work hardened cases examined.

published proceedings

  • Advances in Cryogenic Engineering

author list (cited authors)

  • Hartwig, K. T., Yuan, G. S., & Lehmann, P.

citation count

  • 6

complete list of authors

  • Hartwig, KT||Yuan, GS||Lehmann, P

editor list (cited editors)

  • Reed, R. P., & Clark, A. F.

publication date

  • January 1986