caa a22 4500 465770916 CHVBK 20180323111928.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF00727368 doi (NATIONALLICENCE)springer-10.1007/BF00727368 Effects of low pressures in a dynamic nitrogen atmosphere on titanium-alloy nitriding [Elektronische Daten] [G. Maksimovich, V. Fedirko, I. Pogrelyuk] Summary: Measurements have been made on the interactions of VT1-0, OT4-1, and VT6S titanium alloys with nitrogen at 10-0.1 Pa. Reduced nitrogen partial pressures improve the quality of the nitrided layer considerably. The surface microhardness is reduced somewhat as the partial pressure falls, but after 25 h, it is at the level of 11-13 GPa at all pressures, which is quite satisfactory. This is not the hardness of the brittle and very thin nitride film but that of the strengthened subsurface layers, which do not require additional treatment. The depth of the gas-saturated zone decreases as the pressure is reduced. To produce deep hardened layers (about 100 μm) with good surface finish at 1223 K in 25 h, it is undesirable to reduce the gas pressure below 10 Pa. Plenum Publishing Corporation, 1990 Maksimovich G. Karpenko Physicomechanics Institute, Academy of Sciences of the Ukrainian SSR, L'vov aut Fedirko V. Karpenko Physicomechanics Institute, Academy of Sciences of the Ukrainian SSR, L'vov aut Pogrelyuk I. Karpenko Physicomechanics Institute, Academy of Sciences of the Ukrainian SSR, L'vov aut Soviet materials science : a transl. of Fiziko-khimicheskaya mekhanika materialov / Academy of Sciences of the Ukrainian SSR Kluwer Academic Publishers-Plenum Publishers 26/3(1990-05-01), 338-340 0038-5565 26:3<338 1990 26 11003 https://doi.org/10.1007/BF00727368 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00727368 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maksimovich G. Karpenko Physicomechanics Institute, Academy of Sciences of the Ukrainian SSR, L'vov aut NATIONALLICENCE 700 1- Fedirko V. Karpenko Physicomechanics Institute, Academy of Sciences of the Ukrainian SSR, L'vov aut NATIONALLICENCE 700 1- Pogrelyuk I. Karpenko Physicomechanics Institute, Academy of Sciences of the Ukrainian SSR, L'vov aut NATIONALLICENCE 773 0- Soviet materials science : a transl. of Fiziko-khimicheskaya mekhanika materialov / Academy of Sciences of the Ukrainian SSR Kluwer Academic Publishers-Plenum Publishers 26/3(1990-05-01), 338-340 0038-5565 26:3<338 1990 26 11003 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer