FURTHER INVESTIGATIONS OF THE EFFECT OF PRIOR CREEP ON MECHANICAL PROPERTIES OF C110M TITANIUM WITH EMPHASIS ON THE BAUSCHINGER EFFECT. Period covered: January 1, 1958 to March 31, 1959

Technical Report · Thu Oct 15 04:00:00 EDT 1959

OSTI ID:4167987

Gluck, J V; Freeman, J W

Studies of the effect of creep at 650 to 800 deg F on room temperature mechanical properties of C 110M sheet showed changes characteristic of the Bauschinger effect. After creep in tension, the tensile yield strength was increased and the compressive yield strength was decreased. The effect after 700 deg F creep was almost as large as that reported after cold-stretching. The extent of the effect was governed by the creep time and the direction of creep with respect to the sheet rolling direction. Studies of variable strain paths revealed no apparent difference between rapid strain and creep strain in inducing a Bauschinger effect. As creep tinne or temperature increased, recovery reduced the extent of the effect. Unstressed exposure at 700 deg F removed the effect. The tsat stock also exhibited a stressactivated structural instability during creep that increased strength and decreased ductility. Strain hardening was a minor factor. (auth)

• Research Organization: Michigan. Univ., Ann Arbor. Research Inst.
• NSA Number: NSA-14-015071
• OSTI ID: 4167987
• Report Number(s): WADC-TR-59-681
• Country of Publication: United States
• Language: English

Related Subjects

BAUSCHINGER EFFECT
COLD WORKING
CONFIGURATION
CREEP
DEFORMATION
DUCTILITY
FATIGUE
LATTICES
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
PRESSURE
RECOVERY
ROLLING
SHEETS
STABILITY
STRESSES
TEMPERATURE
TEMPERING
TENSILE PROPERTIES