CFRP/Titanium Alloy Laminated Structure

Abstract:CFRP/titanium alloy laminated structures are widely used in manufacturing the key loadbearing components in aerospace industry because of their high strength，low density and the ability to withstand extreme thermal loads.Due to the different material characteristics of CFRP and titanium alloy phases，the wear behavior of tools is very different when drilling，thus causing such defects as poor accuracy and serious wall damage of holes.Hence，investigating the mechanism of drilling the CFRP/titanium alloy stacks structure and developing an ideal tool have become an urgent need to ensure highquality holes.In this paper，concerning the problems of fast tool wear and poor hole quality in drilling the stacks structure，the development and application status of drilling tools for CFRP/titanium alloy stacks structure are summarized from the aspects of substrate，coating and tool structure，and the shortcomings and research trends in the related researches are also discussed.