Running-In of Systems Protected by Additive-Rich Oils
Tóm tắt
Recent research on mild wearing systems running under boundary lubrication conditions focus more and more on the role of the nano-crystalline layer present at the surface of the components in contact. This layer has a typical thickness of a few tenths of nano-meters up to a few microns depending on the operational conditions. The role of this layer with respect to wear is, however, still unclear as well as its mechanical behavior. In this study, a first step is made in incorporating this type of layer into a wear model. Using an elasto-plastic semi-analytical-method the effect of different material behaviors reported through out current literature for the nano-crystalline layer on wear is studied. From the results it can be concluded that the effect of this mechanically altered layer has an important influence on the wear of the system, especially during the initial phase of running.
Tài liệu tham khảo
Meng, H.C., Ludema, K.C.: Wear models and predictive equations their form and content. Wear 181–183, 443–457 (1995)
Archard, J.F.: Contact and rubbing of flat surfaces. J Appl Phys 24, 981–988 (1953)
Põdra, P., Andersson, S.: Simulating sliding wear with finite element method. Tribol Int 32, 71–81 (1999)
Olofsson, U., Andersson, S., Björklund, S.: Simulation of mild wear in boundary lubricated spherical roller thrust bearings. Wear 241, 180–185 (2000)
Sfantos, G.K., Aliabadi, M.H.: Wear simulation using an incremental sliding boundary element method. Wear 260, 1119–1128 (2006)
Shakhvorostov, D., Pohlmann, K., Scherge, M.: Structure and mechanical properties of tribologically induced nanolayers. Wear 260, 433–437 (2006)
Shakhvorostov, D., Gleising, B., Büscher, R., Dudzinski, W., Fischer, A., Scherge, M.: Microstructure of tribologically induced nanolayers produced at ultra-low wear rates. Wear 263, 1259–1265 (2007)
Hahn, H., Mondal, P., Padmanabhan, K.A.: Plastic deformation of nanocrystalline materials. Nanostruct Mater 9, 603–606 (1997)
Kato, H., Sasase, M., Suiya, N.: Friction-induced ultra-fine and nanocrystalline structures on metal surfaces in dry sliding. Tribol Int 43, 925–928 (2009)
Lu, L., Sui, M.L., Lu, K.: Superplastic extensibility of nanocrystalline copper at room temperature. Science 287, 1463–1466 (2000)
Schiotz, J., Tolla, F.D.D., Jacobsen, K.W.: Softening of nanocrystalline metals at very small grain sizes. Nature 391, 561–563 (1998)
Schiotz, J., Jacobsen, K.W.: A maximum in the strength of nanocrystalline copper. Science 301, 1357–1359 (2003)
Lu, L., Li, S.X., Lu, K.: An abnormal strain rate effect on tensile behavior in nanocrystalline copper. Scripta Mater 45, 1163–1169 (2001)
Wang, Z.B., Tao, N.R., Li, S., Wang, W., Lui, G., Lu, J., Lu, K.: Effect of surface nanocrystallization on friction and wear properties in low carbon steel. Mater Sci Eng 352, 114–119 (2002)
Wang, Y., Lei, T., Liu, J.: Tribo-metallographic behavior of high carbon steels in dry sliding: III. Dynamic microstructural changes and wear. Wear 231, 20–37 (1999)
Chen, X.H., Lu, J., Lu, L., Lu, K.: Tensile properties of a nanocrystalline 316L austenitic stainless steel. Scripta Mater 52, 1039–1044 (2005)
Umemoto, M.: Nanocrystallization of steels by severe plastic deformation. Mater Trans 44, 1900–1911 (2003)
Garbar, I.: Microstructural changes in surface layers of metal during running-in friction processes. Meccanica 36, 631–639 (2001)
Nelias, D., Boucly, V., Brunet, M.: Elastic-plastic contact between rough surfaces: proposal for a wear or running-in model. J Tribol 128, 236–244 (2006)
Jacq, C., Nelias, D., Lormand, G., Girodin, D.: Development of a three-dimensional semi-analytical elastic-plastic contact code. J Tribol 124, 653–667 (2002)
Nelias, D., Antaluca, E., Boucly, V., Cretu, S.: A three-dimensional semianalytical model for elastic-plastic sliding contacts. J Tribol 129, 761–771 (2007)
Godfrey, D.: Boundary lubrication. Nasa Sp-118. 335-373 (1968)
Liu, S., Wang, Q.: Studying contact stress fields caused by surface tractions with a discrete convolution and fast Fourier transform algorithm. J Tribol 124, 36–45 (2002)
Kim, H.S., Bush, M.B.: The effects of grain size and porosity on the elastic modulus of nanocrystalline materials. Nanostruct Mater 11, 361–367 (1999)
Wang, F., Keer, L.M.: Numerical simulation for three dimensional elastic-plastic contact with hardening behavior. J Tribol 127, 494–502 (2005)
Bosman, R., Schipper, D.J.: Running in of metallic surfaces in the boundary lubricated regime. Wear (in review) (2010)
Liu, S.B., Wang, Q.: Elastic fields due to eigenstrains in a half-space. J Appl Mech Trans ASME 72, 871–878 (2005)
Polonsky, I.A., Keer, L.M.: A numerical method for solving rough contact problems based on the multi-level multi-summation and conjugate gradient techniques. Wear 231, 206–219 (1999)
Zhang, Z., Yamaguchi, E.S., Kasrai, M., Bancroft, G.M.: Tribofilms generated from ZDDP and DDP on steel surfaces: part I. Tribol Lett 17, 211–220 (2005)
Ye, J.P., Araki, S., Kano, M., Yasuda, Y.: Nanometer-scale mechanical/structural properties of molybdenum dithiocarbamate and zinc dialkylsithiophosphate tribofilms and friction reduction mechanism. Jpn J Appl Phys 1 44, 5358–5361 (2005)
Martin, J.M., Grossiord, C., Le Mogne, T., Bec, S., Tonck, A.: The two-layer structure of zndtp tribofilms part 1: AES, XPS and XANES analyses. Tribol Int 34, 523–530 (2001)
Minfray, C., Martin, J.-M., Lubrecht, T., Belin, M., Mogne, T.L.: A novel experimental analysis of the rheology of ZDDP tribofilms, Tribology and Interface Engineering Series, pp. 807–817. Elsevier, Amsterdam (2003)
So, H., Lin, Y.C.: The theory of antiwear for ZDDP at elevated temperature in boundary lubrication condition. Wear 177, 105–115 (1994)
Cutiongco, E.C., Chung, Y.-W.: Prediction of scuffing failure based on competitive kinetics of oxide formation and removal: application to lubricated sliding of AISI 52100 steel on steel. Tribology Transactions 37, 622–628 (1994)
Oila, A., Bull, S.J.: Assessment of the factors influencing micropitting in rolling/sliding contacts. Wear 258, 1510–1524 (2005)
Boucly, V.: Semi-analytical modeling of the transient-elastic-plastic contact and its application to asperity collision, wear and running in of surfaces, PhD Thesis, Lyon, 2008 p 203
Evans, R.D.: Transmission Electron Microscopy of Boundary-Lubricated Bearing Surfaces. Part: II Mineral Oil Lubricant with Sulfur and Phosphorus-Containing Gear Oil Additives. Tribology Trasnsactions 48, 299–307 (2005)
Willner, K.: Fully Coupled Frictional Contact Using Elastic Halfspace Theory. J Tribol 130, 031405–031408 (2008)
Nicholls, M.A., Norton, P.R., Bancroft, G.M., Kasrai, M., Do, T., Frazer, B.H., Stasio, G.D.: Nanometer scale chemomechanical characterization of antiwear films. Tribol Lett 17, 205–336 (2003)
Kasrai, M., Fuller, M.S., Bancroft, G.M., Yamaguchi, E.S., Ryason, P.R.: X-ray adsorption study of the effect of calcium sulfonate on antiwear film formation generated from neutral and basic ZDDPs: part 1—phosphorus species. Tribology Transactions 46, 434–442 (2003)
Nicholls, M.A., Do, T., Norton, P.R., Kasrai, M., Bancroft, G.M.: Review of the lubrication of metallic surfaces by zinc dialkyl-dithiophosphates. Tribol Int 38, 15–39 (2005)
Aktary, M., McDermott, M.T., McAlpine, G.A.: Morphology and nanomechanical properties of ZDDP antiwear films as a function of tribological contact time. Tribol Lett 12, 155–162 (2002)
Nicholls, M.A., Bancroft, G.M., Norton, P.R., Kasrai, M., De Stasio, G., Frazer, B.H., Wiese, L.M.: Chemomechanical properties of antiwear films using X-ray absorption microscopy and nanoindentation techniques. Tribol Lett 17, 245–259 (2004)
Ye, J.P., Kano, M., Yasuda, Y.: Evaluation of nanoscale friction depth distribution in ZDDP and MoDTC tribochemical reacted films using a nanoscratch method. Tribol Lett 16, 107–112 (2004)
Ji, H.B., Nicholls, M.A., Norton, P.R., Kasrai, M., Capehart, T.W., Perry, T.A., Cheng, Y.T.: Zinc-dialkyl-dithiophosphate antiwear films: dependence on contact pressure and sliding speed. Wear 258, 789–799 (2005)
Bec, S., Tonck, A., Georges, J.M., Coy, R.C., Bell, J.C., Roper, G.W.: Relationship between mechanical properties and structures of zinc dithiophosphate anti-wear films. In: Proceedings of the Royal Society of London Series A—Mathematical Physical and Engineering Sciences, vol 455, pp. 4181–4203, 1999
Komvopoulos, K., Do, V., Yamaguchi, E.S., Ryason, P.R.: Nanomechanical and nanotribological properties of an antiwear tribofilm produced from phosphorus-containing additives on boundary-lubricated steel surfaces. J Tribol Trans ASME 126, 775–780 (2004)
Warren, O.L.: Nanomechanical properties of films derived from zinc dialkyldithiophosphate. Tribol Lett 4, 189–198 (1998)
Minfray, C., Martin, J.M., Esnouf, C., Le Mogne, T., Kersting, R., Hagenhoff, B.: A multi-technique approach of tribofilm characterisation. Thin Solid Films 447, 272–277 (2004)
Pereira, G., Munoz-Paniagua, D., Lachenwitzer, A., Kasrai, M., Norton, P.R., Capehart, T.W., Perry, T.A., Cheng, Y.-T.: A variable temperature mechanical analysis of ZDDP-derived antiwear films formed on 52100 steel. Wear 262, 461–470 (2007)
Bancroft, G.M., Kasrai, M., Fuller, M., Yin, Z., Fyfe, K., Tan, K.H.: Mechanisms of tribochemical film formation: stabilityof tribo- and thermally-generated ZDDP films. Tribol Lett 3, 47–51 (1997)
Topolovec-Miklozic, K., Forbus, T., Spikes, H.: Film thickness and roughness of ZDDP antiwear films. Tribol Lett 26, 161–171 (2007)