Abstract
In this paper, the running-in tribological behavior of Pb-free brass (i.e., 64% copper and 36% Zinc) sliding against 100Cr6 under lubricated condition and its effect on grain refinement are investigated systematically. The sliding experiment is preformed using a tribometer based on in situ holography microscopy and radionuclide technique. After the tribological test, the friction pair is characterized using scanning electron microscopy and transmission electron microscopy in order to quantify the micrography, chemistry and microstructure. It is found that the curve of the friction coefficient exhibits two steep falls during the initial stage, while the real-time wear rates at these moments are relatively high. Then the test enters the dynamic stability stage due to equilibrium between the processes of strain hardening and recovery. The brass sliding experiment is carried out in the boundary lubrication region leading to dislocation movement and void formation due to plastic deformation. Moreover, an exceptional increase in two directional stacking faults is observed that extend and interdiffuse into each other. More importantly, as has been observed before, the coarse grains are considerably refined into nano-grains due to the accumulation of dislocation movement induced by repeated sliding test.
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Nobel, C., Hofmann, U., Klocke, F., Veselovac, D., Puls, H.: Application of a new, severe-condition friction test method to understand the machining characteristics of Cu–Zn alloys using coated cutting tools. Wear 344–345, 58–68 (2015). https://doi.org/10.1016/j.wear.2015.10.016
Liu, J., Wang, X.H., Ran, Q.N., Zhao, G., Zhu, X.X.: Microstructure and properties of Cu–3Ti–1Ni alloy with aging process. Trans. Nonferrous Metals Soc. China 26(12), 3183–3188 (2016). https://doi.org/10.1016/S1003-6326(16)64450-3
Bagheri, G.A.: The effect of reinforcement percentages on properties of copper matrix composites reinforced with TiC particles. J. Alloys Compd. 676, 120–126 (2016). https://doi.org/10.1016/j.jallcom.2016.03.085
Lu, Z.C., Zeng, M.Q., Xing, J.Q., Zhu, M.: Improving wear performance of CuSn5Bi5 alloys through forming self-organized graphene/Bi nanocomposite tribolayer. Wear 364–365, 122–129 (2016). https://doi.org/10.1016/j.wear.2016.07.014
Feser, T., Stoyanov, P., Mohr, F., Dienwiebel, M.: The running-in mechanisms of binary brass studied by in situ topography measurements. Wear 303(1–2), 465–472 (2013). https://doi.org/10.1016/j.wear.2013.03.047
Gane, N.: The effect of lead on the friction and machining of brass. Philos. Mag. A 43(3), 545–566 (2006). https://doi.org/10.1080/01418618108240394
Environmental Protection Agency: Safety of Public Water Systems—The Safe Drinking Water Act (SDWA), came into effect on 31.12.2002. Public Health Service Act
European Parliament and Council: Directive 2000/53/EC on End of Life Vehicles (ELV), came into effect on 18.09.2000. Gazette of the European Community, 269, 2000, pp. 34–42
European Parliament and Council: Directive 2011/65/EU on Restriction of Hazardous Substances (RoHS2), revised form came into effect on 08.06.2011
Bundesministerium für Gesundheit, Verbraucherschutz, Ernährung und Landwirtschaft: Verordnung zur Novellierung der Trinkwasserverordnung (TrinkwV2001), came into effect on 21. 05. 2001. Bundesgesetzblatt 24, 2001, pp. 959–980
Zambrano, O.A., Aguilar, Y., Valdés, J., Rodríguez, S.A., Coronado, J.J.: Effect of normal load on abrasive wear resistance and wear micromechanisms in FeMnAlC alloy and other austenitic steels. Wear 348–349, 61–68 (2016). https://doi.org/10.1016/j.wear.2015.11.019
Hernández Battez, A., González, R., Viesca, J.L., Fernández, J.E., Díaz Fernández, J.M., Machado, A., Chou, R., Riba, J.: CuO, ZrO2 and ZnO nanoparticles as antiwear additive in oil lubricants. Wear 265(3–4), 422–428 (2008). https://doi.org/10.1016/j.wear.2007.11.013
AsadiKouhanjani, S., ZareBidaki, A., Akbari, A.: The effect of sliding speed and amount of loading on friction and wear behavior of Cu–0.65 wt%Cr alloy. J. Alloys Compd. 486(1–2), 319–324 (2009). https://doi.org/10.1016/j.jallcom.2009.06.129
Dienwiebel, M., Pöhlmann, K.: Nanoscale evolution of sliding metal surfaces during running-in. Tribol. Lett. 27(3), 255–260 (2007). https://doi.org/10.1007/s11249-007-9216-y
Nehl, E.: Wear test for bulk metal forming using a radionuclide technique. Wear 107(4), 329–341 (1986). https://doi.org/10.1016/0043-1648(86)90163-8
Trdan, U., Skarba, M., Grum, J.: Laser shock peening effect on the dislocation transitions and grain refinement of Al–Mg–Si alloy. Mater. Charact. 97, 57–68 (2014). https://doi.org/10.1016/j.matchar.2014.08.020
Korres, S., Dienwiebel, M.: Design and construction of a novel tribometer with online topography and wear measurement. Rev. Sci. Instrum. 81(6), 063904 (2010). https://doi.org/10.1063/1.3449334
Scherge, M., Pöhlmann, K., Gervé, A.: Wear measurement using radionuclide-technique (RNT). Wear 254(9), 801–817 (2003). https://doi.org/10.1016/S0043-1648(03)00230-8
Cao, H.M., Zhou, X., Li, X.Y., Lu, K.: Friction mechanism in the running-in stage of copper: from plastic deformation to delamination and oxidation. Tribol. Int. 115, 3–7 (2017). https://doi.org/10.1016/j.triboint.2017.05.027
Jahanmir, S., Suh, N.P., Abrahamson, E.P.: The delamination theory of wear and the wear of a composite surface. Wear 32(1), 33–49 (1975). https://doi.org/10.1016/0043-1648(75)90203-3
Suh, N.P.: The delamination theory of wear. Wear 25(1), 111–124 (1973). https://doi.org/10.1016/0043-1648(73)90125-7
Moshkovich, A., Perfilyev, V., Bendikov, T., Lapsker, I., Cohen, H., Rapoport, L.: Structural evolution in copper layers during sliding under different lubricant conditions. Acta Mater. 58(14), 4685–4692 (2010). https://doi.org/10.1016/j.actamat.2010.05.001
Moshkovich, A., Perfilyev, V., Meshi, L., Samuha, S., Cohen, S., Cohen, H., Laikhtman, A., Rapoport, L.: Friction, wear and structure of Cu samples in the lubricated steady friction state. Tribol. Int. 46(1), 154–160 (2012). https://doi.org/10.1016/j.triboint.2011.03.013
Moshkovich, A., Perfilyev, V., Gorni, D., Lapsker, I., Rapoport, L.: The effect of Cu grain size on transition from EHL to BL regime (Stribeck curve). Wear 271(9), 1726–1732 (2011). https://doi.org/10.1016/j.wear.2010.12.052
Lu, J.Z., Luo, K.Y., Zhang, Y.K., Sun, G.F., Gu, Y.Y., Zhou, J.Z., Ren, X.D., Zhang, X.C., Zhang, L.F., Chen, K.M., Cui, C.Y., Jiang, Y.F., Feng, A.X., Zhang, L.: Grain refinement mechanism of multiple laser shock processing impacts on ANSI 304 stainless steel. Acta Mater. 58(16), 5354–5362 (2010). https://doi.org/10.1016/j.actamat.2010.06.010
Lychagin, D.V., Filippov, A.V., Novitskaia, O.S., Chumlyakov, Y.I., Kolubaev, E.A., Sizova, O.V.: Friction-induced slip band relief of Hadfield steel single crystal oriented for multiple slip deformation. Wear 374–375, 5–14 (2017). https://doi.org/10.1016/j.wear.2016.12.028
Zhang, P., Qu, S., Yang, M.X., Yang, G., Wu, S.D., Li, S.X., Zhang, Z.F.: Varying tensile fracture mechanisms of Cu and Cu–Zn alloys with reduced grain size: from necking to shearing instability. Mater. Sci. Eng., A 594(Supplement C), 309–320 (2014). https://doi.org/10.1016/j.msea.2013.11.079
Fischer, A.: Subsurface microstructural alterations during sliding wear of biomedical metals. Modelling and experimental results. Comput. Mater. Sci. 46(3), 586–590 (2009). https://doi.org/10.1016/j.commatsci.2009.01.016
Christian Greiner, Z.L.: Luis Strassberger, Peter Gumbsch: sequence of stages in the microstructure evolution in copper under mild reciprocating tribological loading. ACS Appl. Mater. Interfaces. 8, 15809–15819 (2016)
Lu, J.Z., Luo, K.Y., Zhang, Y.K., Cui, C.Y., Sun, G.F., Zhou, J.Z., Zhang, L., You, J., Chen, K.M., Zhong, J.W.: Grain refinement of LY2 aluminum alloy induced by ultra-high plastic strain during multiple laser shock processing impacts. Acta Mater. 58(11), 3984–3994 (2010). https://doi.org/10.1016/j.actamat.2010.03.026
Karthikeyan, S., Agrawal, A., Rigney, D.A.: Molecular dynamics simulations of sliding in an Fe–Cu tribopair system. Wear 267(5), 1166–1176 (2009). https://doi.org/10.1016/j.wear.2009.01.032
Zhai, W.Z., Shi, X.L., Wang, M., Xu, Z.S., Yao, J., Song, S.Y., Wang, Y.F.: Grain refinement: a mechanism for graphene nanoplatelets to reduce friction and wear of Ni3Al matrix self-lubricating composites. Wear 310(1–2), 33–40 (2014). https://doi.org/10.1016/j.wear.2013.12.014
Acknowledgements
This work is funded by the National Natural Science Foundation of China (Project Nos. 51601021, 51441001) and the German Science Foundation DFG (Project No. DI 1494/4-1) and Natural Science Foundation of Jiangsu Province (Project No. BK20140262) and the Natural Science Foundation of Jiangsu Higher Education Institutions (17KJA460002) and China Postdoctoral Science Foundation (Project No. 2017M611718). The authors also wish to thank André Blockhaus for assistance with the in situ tribological experiments.
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Liu, L., Zhang, Z. & Dienwiebel, M. The Running-in Tribological Behavior of Pb-Free Brass and Its Effect on Microstructural Evolution. Tribol Lett 65, 160 (2017). https://doi.org/10.1007/s11249-017-0943-4
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DOI: https://doi.org/10.1007/s11249-017-0943-4