Effect of Cutting Depth on Subsurface Defects and Residual Stress in Single Crystal γ-TiAl Alloy
WANG Qi1,2, FENG Ruicheng1,2,*, FAN Lihe1,2, SHAO Zihao1,2, DONG Jianyong1,2
1 School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China 2 Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education Lanzhou University of Technology, Lanzhou 730050, China
Abstract: In this paper, the molecular dynamics method was used to simulate the cutting process of single crystal γ-TiAl alloy under different cutting depths. The evolution of microscopic defects and the evolution of internal stress after stable cutting at different depths of cutting was analyzed, and the distribution of residual stress and von Mises stress at different cutting depths were studied, the relationship between the evolution of microscopic defects and internal stress at different cutting depths was discussed. The results show that the dislocation reaction and the stacking fault evolution increase with the increase of cutting depth, and the dislocation reaction has a great influence on the formation of the Lomer-Cottrell dislocation. The residual compressive stress formed by the surface of the tool extrusion workpiece is affected by the stacking fault evolution and dislocation reaction, and the severity of the dislocation reaction affects the internal stress. The residual compressive stress exists on a certain depth of the subsurface. It is also found that the change of cutting depth had little effect on von Mises stress.
1 Yao C F, Lin J N, Wu D X, et al. Chinese Journal of Aeronautics, 2018, 31(4), 826. 2 Liu B, Xu Z, Chen C, et al. Computational Materials Science, 2019, 163, 127. 3 Fang F Z, Wu H, Zhou W, et al. Journal of Materials Processing Technology, 2007, 184(1-3), 407. 4 Sharma A, Datta D, Balasubramaniam R. Computational Materials Science, 2018, 153, 241. 5 Zhang L, Zhao H W, Dai L, et al. RSC Advances, 2015, 5(17), 12678. 6 Han X L, Liu P, Sun D L, et al. Tribology International, 2019, 137, 340. 7 Wang Q L, Bai Q S, Chen J X, et al. Applied Surface Science, 2015, 344, 38. 8 Wang J S, Zhang X D, Fang F Z, et al. Applied Surface Science, 2018, 455, 608. 9 Feng R C, Qiao H Y, Zhu Z X, et al. Rare Metal Materials & Enginee-ring, 2019, 48(5), 1559(in Chinese). 冯瑞成, 乔海洋, 朱宗孝, 等. 稀有金属材料与工程, 2019, 48(5), 1559. 10 Dai H F, Chen G Y, Zhou C, et al. Applied Surface Science, 2017, 393, 405. 11 Mylvaganam K, Zhang L. Computational Materials Science, 2014, 81(2), 10. 12 Wang Y C, Shi J, Ji C H. Applied Physics A, 2014, 115(4), 1263. 13 Wang M H, You S Y, Wang F N, et al. Applied Physics, 2019, 125(3), 176. 14 Song H Y, Zha X W. Rare Metal Materials & Engineering, 2008, 37(7), 1217(in Chinese). 宋海洋, 查新未. 稀有金属材料与工程, 2008, 37(7), 1217. 15 Zhang L, Zhao H W, Yang Y H, et al. Applied Physics A, 2014, 116(1), 141. 16 Gu H Q. Study of crystal aluminum nona cutting mechanism based on molecular dynamics. Master's Thesis, Kunming University of Science and Technology, China, 2015 (in Chinese). 谷汉卿. 基于分子动力学单晶铝纳米切削机理研究. 硕士学位论文, 昆明理工大学, 2015. 17 Qi S H. The molecular dynamics study of metallic titanium nanofabrication. Master's Thesis, Shenyang Aerospace University, China, 2013 (in Chinese). 齐顺河. 金属钛纳米加工的分子动力学研究. 硕士学位论文, 沈阳航空航天大学, 2013. 18 Zhu Y, Zhang Y C, Qi S H, et al. Rare Metal Materials & Engineering, 2016, 45(4), 897. 19 Dandekar C R, Shin Y C. Composites: Part A, 2011, 42(4), 355. 20 Uezaki K, Shimizu J, Zhou L. Precision Engineering, 2014, 38(2), 371. 21 Tao H J, Sun S P, Zhang C C, et al. The Chinese Journal of Nonferrous Metals, 2014(11), 2789(in Chinese). 陶辉锦, 孙顺平, 张铖铖, 等. 中国有色金属学报, 2014(11), 2789. 22 Gong Y D, Zhu Z X, Zhou Y G, et al. Science China (Technological Sciences), 2016, 59(12), 1837. 23 Graham L W Cross. Nature Nanotechnology, 2011, 6(8), 467.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2021, Vol. 35 
