Original title: Micromechanical aspects of transgranular and intergranular failure competition
Authors: Dlouhý, Ivo ; Němec, Ondřej
Document type: Papers
Conference/Event: International Conference on Materials structure and Micromechanics of Fracture /3./, Brno (CZ), 2001-06-27 / 2001-06-29
Year: 2001
Language: eng
Abstract: Main purpose of the work was to quantify causes and characteristics governing the intergranular fracture initiation and occurrence of this fracture micromechanism in competition with cleavage one. A CrNi steel of commercial quality and the same steel with increased content of impurity elements have been used for investigation. Step cooling treatment has been applied in order to induce intergranular embrittlement and brittle fracture initiation in both steel melts. Except for standard specimen geometry for three-point bending the pre-cracked Charpy type specimens were applied for determination of fracture mechanical properties. Fractal analysis was applied in order to characterise the quantitative morphological differences in fracture surfaces. Relation of cleavage fracture stress and critical stress for intergranular failure has been followed.
Keywords: brittle fracture initiation; cleavage fracture; intergranular fracture
Project no.: CEZ:AV0Z2041904 (CEP), OC 517.20, IAA2041003 (CEP)
Funding provider: GA MŠk, GA AV ČR
Host item entry: MATERIAL STRUCTURE & MICROMECHANICS OF FRACTURE PROCEEDINGS MSMF-3, ISBN 80-214-1892-3

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0074597

Permalink: http://www.nusl.cz/ntk/nusl-26469


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