Fracture toughness of heterogeneous energy components

Abstract

The presence of different microstructures along pre-crack fatigue fronts has important effects on the critical crack tip opening displacement (CTOD). This value is the relevant parameter for the safe servicing of energy components (penstocks). In the case of specimens with a through thickness notch partly in the weld metal, partly in the heat affected zone and partly in the base material, i.e. using the composite notched specimen, the fracture behaviour strongly depends on the portion of ductile base material, its size and the distribution of the mismatching factor along the vicinity of the crack front.

Keywords

fracture toughness;energy materials;experimental testing;

Data

Language:	English
Year of publishing:	2012
Typology:	1.01 - Original Scientific Article
Organization:	UM FE - Faculty of Energetics
UDC:	621.791:620.1
COBISS:	1024110684
ISSN:	1855-5748
Parent publication:	Journal of energy technology
Views:	1221
Downloads:	44
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary title:	Lomna žilavost heterogenih energetskih komponent
Secondary abstract:	Prisotnost različnih mikrostruktur vzdolž fronte utrujenostne razpoke vpliva na kritično odpiranje konice razpoke (CTOD). Ta vrednost je relevantni parameter za varno obratovanje energetskih component (npr. zapornic hidroelektrarn). V primeru, ko je fronta konice razpoke nameščena po celotni debelini preizkušanca t.i. kompozitna razpoka in je delno prisotna v materialu zvara, toplotno vplivanem področju in osnovnem materialu, takrat je lomno obnašanje materiala odvisno od deleža žilavega osnovnega materiala, velikosti in porazdelitve faktorja trdnostne neenakosti vzdolž fronte konice razpoke.
Secondary keywords:	energetske komponente;zvarni spoji;lomna žilavost;
URN:	URN:SI:UM:
Type (COBISS):	Not categorized
Pages:	str. 39-45
Volume:	ǂVol. ǂ5
Issue:	ǂiss. ǂ3
Chronology:	aug. 2012
ID:	1435214