Accession Number:

AD0766851

Title:

A Simple Method for Charpy Impact Testing Below 6 deg. K.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA UNIV BERKELEY DEPT OF MATERIALS SCIENCE AND ENGINEERING

Report Date:

1973-07-01

Pagination or Media Count:

18.0

Abstract:

The report describes a simple, inexpensive technique for conducting Charpy impact tests at temperatures as low as 5-6K. A Charpy V-notch specimen is wrapped in styrofoam and placed inside a thin-walled lucite box. Liquid helium is then transferred to the box system at 2-3 psi dewar pressure and a flow rate of approximately 2 litersminute using a vacuum insulated transfer line. A steady state temperature of 5-6K is quickly attained and maintained as long as helium transfer is continued. Tests comparing the proposed technique to the ASTM standard method at liquid nitrogen temperature indicate that a reasonably accurate impact energy is obtained. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE