Journal
CHINESE JOURNAL OF AERONAUTICS
Volume 27, Issue 5, Pages 1334-1342Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2014.08.006
Keywords
Grinding force; Grinding temperature; Particles; Surface appearance; Titanium matrix composites
Categories
Funding
- National Natural Science Foundation of China [51235004, 51375235]
- Fundamental Research Funds for the Central Universities of China [NE2014103]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) of China
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(TiCp+TiBw)/Ti-6Al-4V titanium matrix composites (PTMCs) have broad application prospects in the aviation and nuclear field. However, it is a typical difficult-to-cut material due to high hardness of the reinforcements, high strength and low thermal conductivity of Ti-6Al-4V alloy matrix. Grinding experiments with vitrified CBN wheels were conducted to analyze comparatively the grinding performance of PTMCs and Ti-6Al-4V alloy. Grinding force and force ratios, specific grinding energy, grinding temperature, surface roughness, ground surface appearance were discussed. The results show that the normal grinding force and the force ratios of PTMCs are much larger than that of Ti-6Al-4V alloy. Low depth of cut and high workpiece speed are generally beneficial to achieve the precision ground surface for PTMCs. The hard reinforcements of PTMCs are mainly removed in the ductile mode during grinding. However, the removal phenomenon of the reinforcements due to brittle fracture still exists, which contributes to the lower specific grinding energy and grinding temperature of PTMCs than Ti-6Al-4V alloy. (C) 2014 Production and hosting by Elsevier Ltd. on behalf of CSAA & BUAA.
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