Akademik Veri Yönetim Sistemi
4. Internatıonal Uludağ Scıentıfıc Research Congress 16-17 November 2024 Bursa / Türkiye, Bursa, Türkiye, 16 - 17 Kasım 2024, ss.218-225
The use of graphite, noted
for its low density and high modulus of elasticity, as a reinforcing phase to
improve the mechanical properties of metal matrix composites is an important
field of research. This study investigated the changes in mechanical properties
of compositionally graded Ti6Al4V/graphite metal matrix composites, fabricated
through pressure-assisted sintering, at the microstructural level using
hardness mapping techniques. Areal hardness evaluations were performed on the
10% graphite reinforced upper layer (1000 µm), the 100% Ti6Al4V matrix lower
layer (3000 µm), and the interfacial regions between the two layers. Areal
hardness distribution maps for the regions where hardness values were measured
were generated using the hardness region mapping code developed in Python
software. The hardness value was recorded at approximately 405 HV in the upper
layer (composite region) and 340 HV in the lower layer, which is entirely
composed of Ti6Al4V. Microstructural analyses verified regional differences in
hardness values within the composite layer, ascribed to the aggregation of graphite particles. The
regional variations in the mechanical properties of Ti6Al4V/graphite metal
matrix composites, as revealed by hardness mapping analyses, demonstrated that
the hardness values increased by approximately 20% due to the incorporation of
graphite reinforcement in the produced composites.
Keywords: Ti6Al4V, graphite, hardness mapping, particle
reinforcement, metal matrix composites