Residual stresses in nitrided layers on titanium alloys produced under glow discharge conditions.

• Autorzy: Wierzchoń T. , Major B. , Wołczyński W.
• Konferencja: AMT'98 XVth Physical Metallurgy and Materials Science Conference 'Advanced materials & technologies' 17-21 May, 1998, Kraków-Krynica, Poland.
• Języki publikacji: EN

Abstrakty

EN

Plasma nitriding treatment of titanium alloys is performed to improve the frictional wear and corrosion resistance. Titanium alloys OT4-0 were treated at various temperatures. The X-ray diffraction phase analysis revealed the TiN, Ti2N and TiN0.30 phases in the surface layers when the process was completed. Respective relations between the identified phases varied slightly in respect to the process conditions. The X-ray square sin psi method was used to measure residual stresses within the surface layers of examined alloys subjected formerly to the plasma nitriding. Calculations of the residual stresses were carried out mainly for the TiN phase on the basis of the 311 diffraction line. The level of residual stresses was within the range of about -2.2 to -3.2 GPa in respect to the applied experimental nitriding conditions for measurements of the front surface. Measurements performed for the back surface revealed diminishing of the stress level of about -1.8 to -2.8 GPa, respectively. An attempt was made to estimate residual stresses in the other constituent phases i.e. Ti2N and TiN0.30, the values for the TiN were used in calculations. The obtained results presented also the compresive residual stresses of order -1.6 to -2.4 GPa for the Ti2N and -1.4 to 2.0 GPa for the TiN0.30. Increase of resistance to corrosion and to frictional wear was stated in the plasma nitrided materials.

Słowa kluczowe

EN

nitriding; titanium; alloy; layer; residual stresses; X-ray diffraction analysis; corrosion resistance; glow discharge

PL

azotowanie; tytan; stop; warstwa; naprężenia szczątkowe; analiza rentgenowska dyfrakcyjna; odporność korozyjna; wyładowanie jarzeniowe

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 4
• Strony: 1007--1010

Twórcy

autor

Wierzchoń T.

autor

Major B.

autor

Wołczyński W.

• Warsaw University of Technology, Faculty of Materials Science and Engineering