Effect of burnishing on the contact fatigue of regenerative thermally sprayed coatings

• Autorzy: Starosta R.
• Języki publikacji: EN

Abstrakty

EN

This study of the resistance to contact fatigue of Ni-5%Al alloy coatings and Ni-5%Al-15%Al2O3 composite coatings were evaluated. The coatings were prepared by flame spraying (Casto-Dyn DS 8000 torch) and plasma spraying (PN 120 plasma jet). The coatings were subjected to a finishing treatment: turning, burnishing and grinding. Depending on coatings phase composition and finishing treatment, the parameter mean values of surface roughness (Ra) were in the wide range of 0.28 to 2.61 􀁐m. The coatings after burnishing characterized by smallest of surface roughness. The largest value of the parameter Ra was observed in the case of coatings after turning. The presence of the reinforcing phase in the coating increases the surface roughness of thermally sprayed composite coatings. The hardness of coatings also depends on the finishing methods. The minimum hardness equal to 192 HV2 was found in the case of coatings of Ni-5%Al obtained by using a Casto-Dyn DS 8000 gas torch. Burnished Ni-5%Al-15%Al2O3 coatings obtained by plasma spraying characterized by hardness 291 HV2. Resistance of fatigue surface of thermally sprayed coatings on a SCF (standing contact fatigue) test stand was assessed. The test was designed based on the guidelines of the PN-80/H-04324 Polish standard. During the fatigue tests were provided constant contact of co-acting parts, without slipping. Based on the survey it was found that the plasma sprayed coatings (PN120 plasma-jet) have a greater resistance to fatigue then the coatings obtained by flame spraying Casto-Dyn DS 8000 torch. Composite coatings of Ni-5%Al- 15%Al2O3 are more resistant to contact fatigue, compared to the alloy coatings of Ni-5%Al. Burnishing increases the fatigue resistance of coatings when compared to turning. Burnished and polished surfaces are characterized by a similar contact fatigue resistance.

Słowa kluczowe

EN

thermal spraying; Ni-5%Al-Al2O3 coatings; contact fatigue

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 1
• Strony: 309--315
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Starosta R.

• Gdynia Maritime University, Department of Marine Maintenance Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

Bibliografia

• [1] Burakowski, T., Wierzchoń, T., Inżynieria powierzchni metali, Wyd. WNT, Warszawa 1995.
• [2] Charchalis, A. Starosta, R. Labuda, W., The analysis of finish tooling influence on contact fatigue of steel applied to sea water pump shafts, Journal of KONES Powertrain and Transport, Vol. 18, No. 2, pp. 85-92, 2011.
• [3] Korzyński, M., Pacana, A., Cwanek J., Fatigue strength of chromium coated elements and possibility of its improvement with slide diamond burnishing, Surface and Coatings Technology, Vol. 203, pp. 1670-1676, 2009.
• [4] Kukiełla, L., Bartosik, P., Szyc, M., Optymalizacja procesu kulowania strumieniowego ze względu na naprężenia wynikowe, Archiwum Technologii Maszyn i Automatyzacji, No. 30, pp. 117-125, 2010.
• [5] Lee, S. D., Kim, T. W., Cho, Y. J., The effect of surface roughness on contact fatigue behavior using mesoscopic approach, Tribology Letters, Vol. 36, pp. 269-276, 2009.
• [6] Olszak, W., Obróbka skrawaniem, Wyd. WNT, Warszawa 2008.
• [7] Mhaede, M., Influence of surface treatments on surface layer properties, fatigue and corrosion fatigue performance of AA7075 T73, Materials and Design, Vol. 41, pp. 61-66, 2012.
• [8] Patyk, R., Kukiełka, L., Projekt nowej metody sterowania rozkładem naprężeń własnych w procesie wielokrotnego hybrydowego nagniatania gładkościowo-umacniającego, Archiwum Technologii Maszyn i Automatyzacji, Vol. 30, pp. 143-150, 2010.
• [9] Przybylski, W., Wiśniewska, A., Zastosowanie nagniatania w obróbce wykończeniowej części maszyn, Współczesne problemy w technologii obróbki przez nagniatanie, Vol 2, Wydawnictwo Politechniki Gdańskiej, Gdansk 2008.
• [10] Przybylski, W., Zastosowanie obróbki nagniataniem w technologii siłowników hydraulicznych, Postępy Nauki i Techniki, No. 6, pp. 196 -201, 2011.
• [11] Wyrzykowski, J. W., Pleszakow, E., Sieniawski, J., Odkształcenie i pękanie metali, Wydawnictwo WNT, Warszawa 1999.