Subgrain refinement strengthening. Eleventh quarterly progress report, April 1, 1977--June 30, 1977

Technical Report · Sat Jan 01 04:00:00 EST 1977

OSTI ID:5313493

Schmidt, C; Klundt, R; Sherby, O D

The nature of the substructure developed in E-Brite 26-1 (a ferritic stainless steel) during warm working is addressed in this report. Specifically, the low and high temperature strengthening effect of torsional deformation at 700/sup 0/C (.54T/sub m) and at a strain rate of 6 x 10/sup -3/s/sup -1/ has been investigated as a function of large torsion strains (epsilon equal or greater 1500%). The subgrain size, dislocation density and misorientation between subgrains were quantitatively measured by transmission electron microscopy to describe the changes brought about by the warm working. It is found that warm working to large strains can produce small subgrains with stable, high angle boundaries. Substructures of this type are shown to give improved low temperature strength while requiring low deformation forces at warm working temperatures.

• Research Organization: Stanford Univ., Calif. (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: EY-76-S-03-0326-038
• OSTI ID: 5313493
• Report Number(s): SAN-326P38X11
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
DEFORMATION
ELASTICITY
ELECTRON MICROSCOPY
GRAIN SIZE
HARDENING
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
SIZE
STAINLESS STEELS
STEELS
STRAIN HARDENING
TENSILE PROPERTIES
THERMOELASTICITY
TORSION