Nitriding VT35 ?-titanium alloy

Fedirko, V. М.; Pogrelyuk, I. M.; Lopushanskii, V. A.; Kalyandruk, V. I.

doi:10.1007/bf00558817

Cited by 5 publications

(2 citation statements)

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“…In general, the growth of the nitrided layers closely followed the parabolic diffusion kinetics at both temperatures, which is in agreement with other published work. 32,[35][36][37][47][48][49][50][51][52][53][54][55] It is to be noted that several studies were performed in the past 32,[35][36][37]56,57 to examine the degree of surface hardening due to nitriding. In one such study, 57 it was reported that the maximum hardness (1,100 HV) was obtained in the sample treated at 950°C for 16 h. However, in another study, 37 the hardness level achieved at 950°C in the similar material was well above 1,700 HV.…”

Section: Gas Nitriding Of Ti Alloysmentioning

confidence: 99%

Recent advances in surface hardening of titanium

Sarma

Chandran

2011

JOM

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Section: Gas Nitriding Of Ti Alloysmentioning

confidence: 99%

Recent advances in surface hardening of titanium

Sarma

Chandran

2011

JOM

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“…The tetragonal Ti 2 N phase was not detected by XRD for all samples, which contradicts some results from the literature. [23][24][25] Despite the high purity of the nitrogen gas (99 . 998%), the tetragonal TiO 2 phase was detected for all samples in the compound layer, which largely consists of TiN.…”

Section: Phase Compositionmentioning

confidence: 99%

Microstructure and microhardness of gas nitrided surface layers in Ti–8Al–1Mo–1V and Ti–10V–2Fe–3Al alloys

Zhecheva¹,

Malinov²,

Sha³

2005

Surface Engineering

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Two different types of titanium alloy, near a Ti-8Al-1Mo-1V and near b Ti-10V-2Fe-3Al, were studied in this work. They were thermochemically treated in a pure nitrogen atmosphere in order to improve their surface properties. The nitriding was performed at two different temperatures, 950uC and 1050uC, and for three different periods of time, 1, 3 and 5 h. Nitrided layers were formed during the process with a thickness from 100 to 350 mm, depending on the processing temperature and time, for both alloys. Their microstructural characteristics and phase composition were studied using optical microscopy and X-ray diffraction. X-ray analyses indicated that new phases a-Ti(N), TiN and TiO 2 were formed during the process of nitriding. The lattice parameters a and c of the a phase and residual surface stress were obtained. The surface hardness was measured for all the samples. Microhardness profiles were obtained on cross-sections of the samples by applying a Knoop indenter. The surface hardness increases with increases in the temperature and duration of nitriding. The maximum values of the microhardness (HK0 . 05) varied between 550 and 820 for Ti-8Al-1Mo-1V. For Ti-10V-2Fe-3Al, they varied between 520 and 870.

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