Investigation of machinability properties of aluminium matrix hybrid composites


Okay F., Islak S., Turgut Y.

JOURNAL OF MANUFACTURING PROCESSES, vol.68, pp.85-94, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 68
  • Publication Date: 2021
  • Doi Number: 10.1016/j.jmapro.2021.05.041
  • Journal Name: JOURNAL OF MANUFACTURING PROCESSES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, Compendex, INSPEC
  • Page Numbers: pp.85-94
  • Keywords: Hybrid composites, Machinability, Drilling, Thrust force, Surface roughness, Delamination, CUTTING PARAMETERS, THRUST FORCE, OPTIMIZATION, REINFORCEMENT, DELAMINATION, QUALITY, WEAR
  • Gazi University Affiliated: Yes

Abstract

In this study, machinability properties of aluminium matrix boron carbide (B4C) and carbon nanofiber (CNF) reinforced hybrid composite material produced by powder metallurgy in drilling were investigated. In the study, the samples produced with hot pressing technique having 6 different volume rates were used. The drilling operations were performed using drills with 3 point angles (90 degrees -118 degrees -135 degrees) at 30-45-67.5 m/min cutting speed and 0.1-0.15-0.225 mm/rev feed rate. As a result of the experiments, the thrust force, moment, and surface roughness were measured and the delamination factor forming at hole exits was calculated. In addition, the effect of reinforcement rate on the machinability was also investigated. In all drill types, it was determined that as the feed rate increased, the thrust force increased and as the reinforcement rate increased, moment values also increased. Surface roughness values increased with the increased feed rate but decreased as the cutting speed increased. As the drill point angle increased, the surface roughness value decreased but the hole exit damage increased.