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Statements

Subject Item
n2:RIV%2F49777513%3A23640%2F03%3A00000095%21RIV%2F2004%2FMSM%2F236404%2FN
rdf:type
n6:Vysledek skos:Concept
dcterms:description
Thermal stresses are induced by temperature differences between the individual parts of cooled castings. In addition to the thermal stresses, transformation stresses are set up in the casting due to the increase in volume that takes place as austenite t ransforms to other structures. At low temperatures, the stress due to contraction and phase transformation adds to the nominal load of the cast component which may cause its fracture far before the load has reached the yield point. At elevated temperatu res, the elastic component of the strain diminishes while the plastic strain increasesoup to a critical range of temperatures (typically, 620 - 650°C for steel and 400 - 620°C for grey cast iron) when the plastic strain prevails. Mostly, it is believed that at this stage the stresses are completely relieved. But our x-ray measurements carried out by a special technique which is to be discussed in detail in our contribution show that it is not true. Thermal stresses are induced by temperature differences between the individual parts of cooled castings. In addition to the thermal stresses, transformation stresses are set up in the casting due to the increase in volume that takes place as austenite t ransforms to other structures. At low temperatures, the stress due to contraction and phase transformation adds to the nominal load of the cast component which may cause its fracture far before the load has reached the yield point. At elevated temperatu res, the elastic component of the strain diminishes while the plastic strain increasesoup to a critical range of temperatures (typically, 620 - 650°C for steel and 400 - 620°C for grey cast iron) when the plastic strain prevails. Mostly, it is believed that at this stage the stresses are completely relieved. But our x-ray measurements carried out by a special technique which is to be discussed in detail in our contribution show that it is not true.
dcterms:title
Casting stress detection by X-rays Casting stress detection by X-rays
skos:prefLabel
Casting stress detection by X-rays Casting stress detection by X-rays
skos:notation
RIV/49777513:23640/03:00000095!RIV/2004/MSM/236404/N
n5:strany
83-90
n5:aktivita
n15:P
n5:aktivity
P(LN00B084)
n5:dodaniDat
n17:2004
n5:domaciTvurceVysledku
n8:9866906 n8:4963768 n8:3732568
n5:druhVysledku
n20:D
n5:duvernostUdaju
n10:S
n5:entitaPredkladatele
n13:predkladatel
n5:idSjednocenehoVysledku
600432
n5:idVysledku
RIV/49777513:23640/03:00000095
n5:jazykVysledku
n21:eng
n5:klicovaSlova
x-ray diffraction imaging, grains, mosaic blocks, casting, thermal stress
n5:klicoveSlovo
n9:thermal%20stress n9:casting n9:mosaic%20blocks n9:x-ray%20diffraction%20imaging n9:grains
n5:kontrolniKodProRIV
[EC4585F1D8A1]
n5:mistoKonaniAkce
Praha
n5:mistoVydani
Brno
n5:nazevZdroje
NDT in Progress
n5:obor
n18:JS
n5:pocetDomacichTvurcuVysledku
3
n5:pocetTvurcuVysledku
4
n5:pocetUcastnikuAkce
0
n5:pocetZahranicnichUcastnikuAkce
0
n5:projekt
n12:LN00B084
n5:rokUplatneniVysledku
n17:2003
n5:tvurceVysledku
Schindler, Ivo Fiala, Jaroslav Němeček, Stanislav Medlín, Rostislav
n5:typAkce
n11:CST
n5:zahajeniAkce
2003-10-06+02:00
s:numberOfPages
8
n14:hasPublisher
Vysoké učení technické v Brně
n16:isbn
80-214-2475-3
n3:organizacniJednotka
23640