Contact fracture of rolling bodies of three-cone rock bits opened bearings in water environments von Ye. I. Kryzhanivskyi, R. S. Yakym, Ye. Shmandrovskyi, Yu. D. Petryna

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Contact durability of arm pins races of three-cone rock bits von Yu. D. Petryna, I. S. Yakym, N. V. Kret, Yu. M. Nykyforchyn

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Corrosion and corrosion-mechanical fracture of crude oil tank steel von Yu. Petryna, V. M. Hohol, Yu. D. Petryna, O. I. Zvirko, Yu. M. Nykyforchyn

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The influence of alloying with rare earth metals on mechanical properties of 17H1S pipe steel von Yu. Petryna, O. L. Kozak, B. R. Shuliar, Yu. D. Petryna, M. I. Hredil

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