Fracture Static Mechanisms on Fatigue Crack Propagation in Microalloyed Forging Steels

[+] Author and Article Information
M. A. Linaza, J. M. Rodriguez-Ibabe

CEIT and ESII de San Sebastián, Pde Manuel de Lardizabal, 15, 20018, San Sebastián, Basque Country, Spain

J. Eng. Mater. Technol 122(2), 198-202 (Oct 14, 1999) (5 pages) doi:10.1115/1.482787 History: Received April 13, 1999; Revised October 14, 1999
Copyright © 2000 by ASME
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Brittle island in the Paris region originated by the rupture of a TiN coarse particle (Ti steel, R=0.03)
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Paris equations of Ti-V and Ti steels for R=0.5. Results obtained with a ferrite-pearlite C-Mn steel are included (Linaza et al. 15).
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Histograms of the minimum and maximum dimensions of coarse TiN particles in the Ti-V steel
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Fracture surface in the Paris zone of Ti-V steel with as-rolled ferrite-pearlite microstructure showing ductile voids nucleated at inclusions (R=0.5,da/dN=1.2×10−7 m/c)
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da/dN−ΔK fatigue crack propagation curves of Ti-V microalloyed steel for different ferrite-pearlite and acicular ferrite microstructures developed by thermomechanical treatments
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da/dN−ΔK fatigue crack propagation curves of as-rolled ferrite-pearlite Ti steel




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