Crack Bridging in Stress Corrosion Cracking of Duplex Stainless Steels

Abstract:

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Wedge open loaded (WOL) specimens of age hardened Zeron 100 duplex stainless steel were tested in 3.5 wt % NaCl solution with cathodic polarizes applied at-900mV/SCE to investigate stress corrosion cracking mechanism in duplex stainless steel. The interaction between microstructure and mechanism of stress corrosion cracking was studied. Fracture mechanism was studied by using scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). The material was found cracked by ferrite cleavage, austenite tearing and austenite dissolution by environment. The ferrite cleavage took place along {100} planes and {112} twin habit planes. The austenite grains appear to act as crack bridging & crack arrester and failed by tearing & stress corrosion cracking.

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Periodical:

Main Theme:

Edited by:

Shaheed Khan, Iftikhar us Salam and Karim Ahmed

Pages:

445-452

DOI:

10.4028/www.scientific.net/KEM.442.445

Citation:

M. Sarwar et al., "Crack Bridging in Stress Corrosion Cracking of Duplex Stainless Steels", Key Engineering Materials, Vol. 442, pp. 445-452, 2010

Online since:

June 2010

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$35.00

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