SiCp/Al复合材料超精密车削仿真与试验研究

Junfeng Xiang, Lijing Xie*, Xin Hu, Shiyan Huo, Siqin Pang, Xibin Wang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

11 引用 (Scopus)

摘要

Aimed at the difficulty in producing high-quality machined surface due to the existence of brittle-phase SiC in SiCp/Al composites, this paper used the molecular dynamics simulation and ultra-precision turning test to investigate the material removal process of SiCp/Al composites at nanoscale, and focused on the machined surface formation mechanism, brittle-ductile transition and tool wear mechanism in single crystal diamond ultra-precision turning of SiCp/Al composites. The results indicate that high-pressure phase transition is the main reason for the brittle-ductile transition of brittle-phase SiC in SiCp/Al composites. With the increase of cutting depth, the removal of SiC particles in SiCp/Al composites experienced from ductile cutting mode to hybrid brittle-ductile cutting mode and finally to purely brittle cutting mode. The SiC-Al interface and soft Al matrix in SiCp/Al composites considerably affects the brittle-ductile cutting mode transition mechanism when machining SiC particles in SiCp/Al composites. The existence of tensile stress on the uncut chip could induce the peak of brittle SiC crack initiation in the cutting zone. The primary wear mechanisms of SCD tools are abrasive wear originated from hard SiC particles' scrape and machining induced graphitization.

投稿的翻译标题Simulation and Experimental Research on Ultra-precision Turning of SiCp/Al Composites
源语言繁体中文
页(从-至)1687-1696
页数10
期刊Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
48
5
出版状态已出版 - 1 5月 2019

关键词

  • Brittle-plastic transition
  • Molecular dynamics
  • SiC/Al composites
  • Single crystal diamond
  • Ultra-precision turning

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引用此

Xiang, J., Xie, L., Hu, X., Huo, S., Pang, S., & Wang, X. (2019). SiCp/Al复合材料超精密车削仿真与试验研究. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering, 48(5), 1687-1696.