A. Jackson, M. Webster, The role of tribology research in the development of advanced lubricants, Tribology Series, Vol. 41, pp. 439-448, 2003.
 D.-X. Peng, C.-H. Chen, Y. Kang, Y.-P. Chang, S.-Y. Chang, Size effects of SiO2 nanoparticles as oil additives on tribologyoflubricant,IndustrialLubricationandTribology, Vol. 62, No. 2, pp. 111-120, 2010.
 S. M. Alves, J. F. G. de Oliveira, Vegetable based cutting fluid: an environmental alternative to grinding process, in Proceeding of, CIRP, pp. 664.
 M. Emami, M. H. Sadeghi, A. A. D. Sarhan, F. Hasani, Investigatingtheminimumquantitylubricationingrindingof Al2O3engineeringceramic,Journalofcleanerproduction, Vol. 66, pp. 632-643, 2014.
 D. Shahriari, A. Amiri, M. Sadeghi, Study on hot ring compression test of Nimonic 115 superalloy using experimental observations and 3D FEM simulation, Journal of Materials Engineering and Performance, Vol. 19, No. 5, pp. 633-642, 2010.
 Y.Zhu,W.Zeng,X.Ma,Q.Tai,Z.Li,X.Li,Determination ofthefrictionfactorofTi-6Al-4Vtitaniumalloyinhotforgingbymeansofring-compressiontestusingFEM,Tribology International, Vol. 44, No. 12, pp. 2074-2080, 2011.
 B. Barooghi, A. Amiri, M. SADEGHI, Study on hot ring compression test of Al 6082 alloy using experimental observations and fem simulation, 2013.
 E. Rajesh, M. SivaPrakash, Analysis of friction factor by employing the ring compression test under different lubricants, International Journal of Scientific and Engineering Research, Vol. 4, No. 5, pp. 1163-1171, 2013.
 B. Lawal Abdulquadir, M. Bolaji Adeyemi, Evaluations of vegetable oil-based as lubricants for metal-forming processes, Industrial Lubrication and Tribology, Vol. 60, No. 5, pp. 242-248, 2008.
 S. Syahrullail, B. Zubil, C. Azwadi, M. Ridzuan, Experimental evaluation of palm oil as lubricant in cold forward extrusion process, International journal of mechanical sciences, Vol. 53, No. 7, pp. 549-555, 2011.
 S. Kobayashi, S.-i. Oh, T. Altan, A. Chaudhary, Metal forming and the finite-element method, Journal of Materials Shaping Technology, Vol. 8, No. 1, pp. 65-65, 1990.
 J. Schey, Tribology in metalworking: friction, wear and lubrication, American Society for Metals, 1983.
 K. Jung, H. Lee, D. Kim, S. Kang, Y. Im, Friction measurement by the tip test for cold forging, Wear, Vol. 286, pp. 19-26, 2012.
 M. Kunogi, A new method of cold extrusion, Journal of the Scientific Research Institute, Vol. 50, No. 1, pp. 215246, 1956.
 A. T. Male, A method for the determination of the coefficient of friction of metals under conditions of bulk plastic deformation, J. Inst. Metal., Vol. 93, pp. 38-46, 1964.
 K. Manisekar, R. Narayanasamy, Effect of friction on barrellinginsquareandrectangularbilletsofaluminiumduring cold upset forging, Materials & design, Vol. 28, No. 2, pp. 592-598, 2007.
 T. Altan, G. Ngaile, G. Shen, Cold and hot forging: fundamentals and applications: ASM international, 2005.
 H. Aydın, A. Bayram, I. Durgun, The effect of post-weld heattreatmentonthemechanicalpropertiesof2024-T4frictionstir-weldedjoints,Materials&Design(1980-2015),Vol. 31, No. 5, pp. 2568-2577, 2010.