Solution hardening and strain hardening at elevated temperatures

Conference · Fri Oct 01 04:00:00 EDT 1982

OSTI ID:6338575

Kocks, U F

Solutes can significantly increase the rate of strain hardening; as a consequence, the saturation stress, at which strain hardening tends to cease for a given temperature and strain rate, is increased more than the yield stress: this is the major effect of solutes on strength at elevated temperatures, especially in the regime where dynamic strain-aging occurs. It is shown that local solute mobility can affect both the rate of dynamic recovery and the dislocation/dislocation interaction strength. The latter effect leads to multiplicative solution strengthening. It is explained by a new model based on repeated dislocation unlocking, in a high-temperature limit, which also rationalizes the stress dependence of static and dynamic strain-aging, and may help explain the plateau of the yield stress at elevated temperatures. 15 figures.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6338575
• Report Number(s): CONF-8210116-2; ON: DE83007745
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ELEMENTS
HARDENING
HIGH TEMPERATURE
MEDIUM TEMPERATURE
METALS
STRAIN HARDENING
TEMPERATURE DEPENDENCE