Overload effect and fatigue crack propagation in amorphous metallic alloys

Journal Article · Sun Jul 01 00:00:00 EDT 1984 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(84)90324-7· OSTI ID:6468067

Chaki, T K; Li, J C.M.

Fatigue crack propagation in amorphous metals has an overload effect which usually increases with the number of overload cycles. The variation of overload effect with delta K is explained by the size of the plastic zone which depends on delta K. A comparison of the spacing between striations and da/dN shows that the crack jumps a step about every hundred cycles. The featureless region is probably due to shear fracture along a shear band during overload. Both crack tip blunting and branching occur during the application of overload. Work hardening is not a necessary factor for the overloading effect.

• Research Organization: Department of Mechanical Engineering, University of Rochester, Rochester, NY
• OSTI ID: 6468067
• Journal Information: Scr. Metall.; (United States), Vol. 18:7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
CRACK PROPAGATION
FATIGUE
STRESS ANALYSIS
AMORPHOUS STATE
DYNAMIC LOADS
ELASTICITY
MECHANICAL TESTS
PHYSICAL METALLURGY
PLASTICITY
SHEAR
YIELD STRENGTH
MATERIALS TESTING
MECHANICAL PROPERTIES
METALLURGY
TENSILE PROPERTIES
TESTING
360103* - Metals & Alloys- Mechanical Properties