Crack Tip Damage Mechanism under Monotonic and Cyclic Loading Conditions

Himadri Roy; Seetharaman Sivaprasad; S. Tarafder; Kalyan Kumar Ray

doi:10.4028/www.scientific.net/KEM.417-418.105

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 417-418Crack Tip Damage Mechanism under Monotonic and...

Crack Tip Damage Mechanism under Monotonic and Cyclic Loading Conditions

Abstract:

Fracture resistance of AISI 304LN stainless steel has been examined by monotonic and cyclic J-integral tests, the latter being carried out using periodic unloading as per pre-determined R-ratio. The cyclic fracture resistance is found to be almost 1/5th of its corresponding monotonic value. The deterioration of fracture resistance under cyclic loading has been attributed to crack tip resharpening due to smearing and smashing of voids owing to rubbing of adjacent crack surfaces in the compressive load cycles.

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Periodical:

Key Engineering Materials (Volumes 417-418)

Pages:

105-108

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.417-418.105

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Online since:

October 2009

Authors:

Himadri Roy, Seetharaman Sivaprasad, S. Tarafder, Kalyan Kumar Ray

Keywords:

AISI 304LN Steel, Cyclic J, Fracture Toughness, Monotonic J, Scanning Electron Microscope (SEM)

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