Creep of pure aluminum at cryogenic temperatures Chapter uri icon

abstract

  • Creep properties of high purity aluminum at 4.2 K and 77 K are examined. The testing is done by placing two or three aluminum specimens in series under constant load at a constant temperature and monitoring the time-dependent strain that occurs over a period of 200 hours, or well into the steady-state region of the creep curve. Steady-state creep rates for annealed, 99.99% pure aluminum are on the order of 4 × 10-12 in/in-sec when tested near the yield strength. The creep system used is also discussed in detail, since no commercial cryogenic system is currently available.

author list (cited authors)

  • McDonald, L. C., & Hartwig, K. T.

publication date

  • December 1990