Accession Number:

ADA172535

Title:

On the Influence of Strain-Path Changes on Fracture.

Descriptive Note:

Technical rept.,

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

• Kestner,S. C.
• Koss,D. A.

Report Date:

1986-08-01

Pagination or Media Count:

14.0

Abstract:

Abrupt changes in strain path between uniaxial and equibiaxial tension are shown to have a large effect on plane-strain ductility. Data for titanium sheets, both with and without hydrides, show that a significant ductility enhancement occurs at a final strain state of plane-strain tension following multi-stage deformation sequences comprised of uniaxial and equibiaxial tension. While the dependence of ductile fracture on both accumulated damage and strain hardening suggests that failure strains should be sensitive to a nonproportional strain-path history, the detailed causes of the present effect is not known. Keywords FractureMechanics, Strain paths, Plane strain, Uniaxial tension, and Titaniumalloys.

Descriptors:

• *STRAIN(MECHANICS)
• *FRACTURE(MECHANICS)
• *TITANIUM ALLOYS
• HYDRIDES
• OPTIMIZATION
• DAMAGE
• DEFORMATION
• TENSILE PROPERTIES
• PATHS
• STRAIN HARDENING
• TENSION
• AXES
• TITANIUM
• DUCTILITY
• ACCUMULATION
• UNIDIRECTIONAL

Subject Categories:

• Metallurgy and Metallography
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE