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Plastometric test of zirconium alloy of system Zr-Nb

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AbstractThe plastometric test of attempts for stretching alloy of system Zr - Nb samples were performed by straining in the temperature range of 650÷950 °C at a strain rate of 0.1÷2.5 s-1. The obtained results will be used for optimization processes of receiving semi-finished products in the conditions of hot deformation. Badania plastometryczne krzywych umocnienia próbek ze stopu Zr - Nb przeprowadzono odkształcając je w temperaturze 650÷950 °C przy prędkości odkształcenia 0,1÷2,5 s-1. Uzyskane wyniki wykorzystano do optymalizacji procesu produkcji półwyrobów w warunkach odkształcania na gorąco. Keywords: zirconium-niobium alloy, yield stress, ductility factor, hot rolling Słowa kluczowe: stop cyrkonu z niobem, naprężenie uplastyczniające, wskaźnik plastyczności, walcowanie na gorąco Introduction. Zirconium and its alloys attract researchers’ and consumers’ attention as a constructive material to work in aggressive environments, especially in nuclear reactors. Irrespective of numerous attempts, not a single hot resistant zirconium alloy has been made so far, which is connected with a dramatic drop in strength properties of zirconium in higher temperatures. At the same time in nuclear technology zirconium alloys have become the main constructive material. Minor alloy additives and admixtures have an important influence on physical-mechanical and technological properties on zirconium base alloys. Besides, the cumulative grade of concentration of [...]

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