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Detekcija majhnih napak v odkovkih in ulitkih z metodo ultrazvočne difrakcije = detection of small failures in forging pieces and castings by time of flight difraction technique
Dukić, Predrag ; Dukić, Ines ; Kmetič, Dimitrij
V velikih odkovkih in debelostenskih ulitkih, ki se uporabljajo v energetiki, je zelo pomembno, da se razpoke odkrijejo že v začetni fazi in tudi, da se določijo večji nekovinski vključki. Zelo ...pomembno je, da se nekovinski vključki ločijo od začetnih mikrorazpok. S klasično ultrazvočno tehniko take ločljivosti ni mogoče doseči. Zato so, posebno pri starejših elementih možne napake in nepravilne odločitve glede nadaljnjega obratovanja. V prispevku je podan praktični prikaz prednosti metode ultrazvočne difrakcije pred drugimi metodami, predvsem možnost odkrivanja začetnih mikrorazpok, kot tudi opredeljevanja nehomogenosti v materialu, ki so posledica tehnologije izdelave in ne eksploatacije.
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