LOMNA ŽILAVOST HETEROGENIH ENERGETSKIH KOMPONENT
Povzetek
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.
Prenosi
Literatura
Praunseis, Z.: The influence of Strength Under-matched Weld Metal containing Heterogeneous Regions on Fracture Properties of HSLA Steel Weld Joint (Dissertation in English). Faculty of Mechanical Engineering, University of Maribor, Slovenia, 1998
BS 5762, Methods for crack opening displacement (COD) testing, The British Standards Institution, London 1979.
ASTM E 1152-87, Standard test method for determining J-R curves, Annual Book of ASTM Standards, Vol. 03.01, American Society for Testing and Materials, Philadelphia, 1990.
ASTM E 1290-91, Standard test method for crack-tip opening displacement (CTOD) fracture toughness measurement, American Society for Testing and Materials, Philadelphia, 1991.
GKSS Forschungszentrum Geesthacht GMBH, GKSS-Displacement Gauge Systems for Applications in Fracture Mechanic.
Praunseis, Z., Toyoda, M., Sundararajan, T.: Fracture behaviours of fracture toughness testing specimens with metallurgical heterogeneity along crack front. Steel res., Sep. 2000, 71, no 9,
Praunseis, Z., Sundararajan, T., Toyoda, M., Ohata, M.: The influence of soft root on fracture behaviors of high-strength, low-alloyed (HSLA) steel weldments. Mater. manuf. process., 2001, vol. 16, 2
Sundararajan, T., Praunseis, Z.: The effect of nitrogen-ion implantation on the corrosion resistance of titanium in comparison with oxygen- and argon-ion implantations. Mater. tehnol., 2004, vol. 38, no. 1/2.