Accession Number:

AD0255288

Title:

STRAIN AGING OF ALPHA-IRON

Descriptive Note:

Corporate Author:

NORTHWESTERN UNIV EVANSTON ILL

Personal Author(s):

• LAUTENSCHLAGER,E.
• BRITTAIN,J.O.

Report Date:

1961-03-10

Pagination or Media Count:

1.0

Abstract:

An investigation was conducted on fine grained lpha-iron wire to measure the influence of the temperature of deformation on strain aging near room temperature. Specimens were deformed various amounts at 77, 195, or 273 K aged and the strain aging followed by either internal friction or return of the yied point meaurements. he results show that strain aging occurs in three stages. During the fist stage there is smal, almost immediate return of the yield point. The solute crbon concentration, as measured by internal friction, remains constant in stage but is lower than the concentration in the unsrained contion. In the second stage, the solute concentration decreases while the magnitude of the yield point increases. In the third stage, the solute atoms continue to drain from the solution, the yield point approaches a maximum, and the strain hardening coefficient and flow curve increased. AUTHOR

Descriptors:

• *AGING(PHYSIOLOGY)
• *IRON
• DEFORMATION
• ELECTRON TRANSITIONS
• HEAT TREATMENT
• INTERNAL FRICTION
• MEASUREMENT
• MECHANICAL PROPERTIES
• STRESSES
• TEMPERATURE
• TENSILE PROPERTIES
• WIRE

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE