Initiation fracture toughness of HSLA steel through automatic measurement of stretch zone

Autor:	Mita Tarafder, Swati Dey, S. Sivaprasad, S. Tarafder, Byomkesh Dash
Rok vydání:	2004
Předmět:	Materials science Ductile materials Stretch zone Mechanical Engineering Alloy Metallurgy engineering.material Condensed Matter Physics Edge detection Fracture toughness Mechanics of Materials engineering Fracture (geology) General Materials Science Composite material
Zdroj:	Materials Science and Technology. 20:1531-1537
ISSN:	1743-2847 0267-0836
DOI:	10.1179/026708304x4376
Popis:	Stretch zones are formed due to crack tip blunting in ductile materials before the initiation of a crack. Using special edge detection filters, an automatic measurement procedure based on image analysis (IA) for estimating stretch zone dimensions has been proposed. The in house developed software based on the proposed technique requires only fractographic images to automatically define stretch zone boundaries. Employing the proposed technique, stretch zone measurements were carried out on a high strength low alloy (HSLA) steel. The initiation fracture toughness of this HSLA steel has been estimated using these stretch zone dimensions. A comparison of measured stretch zone dimensions with the crack tip blunting region of the fracture resistance curve revealed that the blunting behaviour is non-linear and the data range normally considered for constructing the blunting line is inadequate to represent this non-linearity for these steels. Prediction of initiation fracture toughness (J i) in high stren...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3e966ccf1a2b0a664f60fabcc490a30b https://doi.org/10.1179/026708304x4376 Zobrazit plný text záznamu Plný text ve formátu PDF