Antagonism in Fracture and Notch Toughness of UHSLA Steels.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F01%3APU23499" target="_blank" >RIV/00216305:26210/01:PU23499 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Antagonism in Fracture and Notch Toughness of UHSLA Steels.
Original language description
Values of initial fracture toughness KIc and impact absorbed energy of ultra-high strength low alloy steel were determined for 6 different heat treatments leading to 3 different mean prior austenite grain sizes dm. Fracture surfaces of all specimens, except of the standard one, exhibited intergranular morphology. The fracture toughness values increased with increasing dm whereas the absorbed energy decreased. The increase in KIc values is explained in terms of the crack driving force reduction caussed by the intergranularly induced crack tip shielding. The inverse behavior of impact test specimens is associated with a low resistance of coarse grained structures against crack nucleation. Separation of the extrinsic shielding effect from the measured KIcvalues by using a 3D model of the intergranular crack front resulted in a comparable intrinsic fracture toughness of all investigated steel grades.
Czech name
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Czech description
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Project
<a href="/en/project/OC%20517.30" target="_blank" >OC 517.30: Effect of Impurity Embrittlement and Microstructurally Induced Shielding on Crack Stability and Growth Resistance in Low Alloy Steels</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2001
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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