1400 D. Jianxin et al. International Journal of Machine Tools Manufacture 45(2005)1393-1401 fetal Fig. 11. Cross-sectional view SEM micrographs of the won rake face of AB W20 ceramic tool when machining Inconel718 nickel-based alloys. The dashed line represented the EDX line of scanning analysis results of Ni, Co, Cr and Co elements(test conditions: cutting speed v=120 m/min, depth of cut ap 0.3 mm, feed rates f=0.15 mm/r). 2. Cutting speeds were found to have a profound effect on chemically activated diffusion due to the high cutting the wear behaviors of these ceramic tools. The ceramic temperature tools exhibited relative small flank and crater wear at cutting speed lower than 80 m/min, within further cutting speed ear increased greatly. Cutting speeds less than 80 m/min were proved to be the best range for this This work was supported by the National Natural kind of ceramic tool when machining Inconel718 nickel- Science Foundation of China(50275088, 50475133), the based alloys. The composite tool materials with higher Excellent Young Teachers Program of MOE(2055), and SiCw content showed more wear resistance. the Scientific Research Foundation for the Excellent Young Scientists of Shandong Province(02BS064) 3. Abrasive wear was found to be the predominant flank wear mechanism when machining Inconel718 nickel- based alloys. While the mechanisms responsible for Refe the crater wear were determined to be adhesion and [1 B. John, J.R. Wachtman, Structural Ceramics, Academic Press, London, 1989 [2] D w. Richerson, Modern Ceramic Engineering, Marcel Dekker, New [3] E D. whitney, Microstructural engineering of ceramic cutting tools, Ceramic Bulletin 67(6)(1988)1010-1015 [4] G. Brandt, Ceramic cutting tools, state of the art and development trends, Materials Technology 14(1)(1999)17-22. [5] A. Xing, L. Zhaoqian, D Jianxin, Development and perspective of advanced ceramic cutting tool materials, Key Engineering Materials 108(1995)53-66 [ G. Brandt, A. Gerendas, M. Mikus, Wear mechanisms of ceramic cutting tools when machining ferrous and non-ferrous alloys, Journal f the European Ceramic Society 6 (5)(1990)273-290 [7 D. Jianxin, A. Xing, Friction and wear behavior of AlOyTiB2 elevated temperature, Wear 195(1996)128-13 8] J. Barry, G. Byrne, Cutting tool wear in the machining of hardened steels Imm Part I: alumina/TiC cutting tool wear, Wear 247(2001)139-15 [9] D Jianxin, A. Xing, Effect of whisker orienation on the friction and ear behaviour of AlO,TiBy/SiCw ceramic composite both in sliding wear and in cutting processes, Wear 201(1996)178-185 Fig 12. SEM micrograph of the wear profile of ABW20 ceramic cutting [101 A. Senthil Kumar. A. Raja Durai, T. Sornakumar, Machinability of tool when machining Inconel718 nickel-based alloys (test conditions: utting speed v=180 m/min, depth of cut ap=0.3 mm, feed rates f ardened steel using alumina based cutting tools, Inter- 0.15mm/r) tional Journal of Refractory Metals and Hard Materials 21(3/4 (2003)109-1172. Cutting speeds were found to have a profound effect on the wear behaviors of these ceramic tools. The ceramic tools exhibited relative small flank and crater wear at cutting speed lower than 80 m/min, within further increasing of the cutting speed the flank and crater wear increased greatly. Cutting speeds less than 80 m/min were proved to be the best range for this kind of ceramic tool when machining Inconel718 nickel￾based alloys. The composite tool materials with higher SiCw content showed more wear resistance. 3. Abrasive wear was found to be the predominant flank wear mechanism when machining Inconel718 nickel￾based alloys. While the mechanisms responsible for the crater wear were determined to be adhesion and chemically activated diffusion due to the high cutting temperature. Acknowledgements This work was supported by ‘the National Natural Science Foundation of China (50275088, 50475133)’, ‘the Excellent Young Teachers Program of MOE (2055)’, and ‘the Scientific Research Foundation for the Excellent Young Scientists of Shandong Province (02BS064)’. References [1] B. John, J.R. Wachtman, Structural Ceramics, Academic Press, London, 1989. [2] D.W. Richerson, Modern Ceramic Engineering, Marcel Dekker, New York, 1992. [3] E.D. Whitney, Microstructural engineering of ceramic cutting tools, Ceramic Bulletin 67 (6) (1988) 1010–1015. [4] G. Brandt, Ceramic cutting tools, state of the art and development trends, Materials Technology 14 (1) (1999) 17–22. [5] A. Xing, L. Zhaoqian, D. Jianxin, Development and perspective of advanced ceramic cutting tool materials, Key Engineering Materials 108 (1995) 53–66. [6] G. Brandt, A. Gerendas, M. Mikus, Wear mechanisms of ceramic cutting tools when machining ferrous and non-ferrous alloys, Journal of the European Ceramic Society 6 (5) (1990) 273–290. [7] D. Jianxin, A. Xing, Friction and wear behavior of Al2O3/TiB2 ceramic composite against cemented carbide in various atmosphere at elevated temperature, Wear 195 (1996) 128–132. [8] J. Barry, G. Byrne, Cutting tool wear in the machining of hardened steels Part I: alumina/TiC cutting tool wear, Wear 247 (2001) 139–151. [9] D. Jianxin, A. Xing, Effect of whisker oritenation on the friction and wear behaviour of Al2O3/TiB2/SiCw ceramic composite both in sliding wear and in cutting processes, Wear 201 (1996) 178–185. [10] A. Senthil Kumar, A. Raja Durai, T. Sornakumar, Machinability of hardened steel using alumina based ceramic cutting tools, Inter￾national Journal of Refractory Metals and Hard Materials 21 (3/4) (2003) 109–117. Fig. 11. Cross-sectional view SEM micrographs of the worn rake face of ABW20 ceramic tool when machining Inconel718 nickel-based alloys. The dashed line represented the EDX line of scanning analysis results of Ni, Co, Cr and Co elements (test conditions: cutting speed vZ120 m/min, depth of cut apZ 0.3 mm, feed rates fZ0.15 mm/r). Fig. 12. SEM micrograph of the wear profile of ABW20 ceramic cutting tool when machining Inconel718 nickel-based alloys (test conditions: cutting speed vZ180 m/min, depth of cut apZ0.3 mm, feed rates fZ 0.15 mm/r). 1400 D. Jianxin et al. / International Journal of Machine Tools & Manufacture 45 (2005) 1393–1401