Evaluation of the performance of α-SiAlON tool when turning Ti-6Al-4V alloy without coolant
MetadataShow full item record
Due to their high hardness and wear resistance, Si3N4 based ceramics are one of the most suitable cutting tool materials for machining cast iron, nickel alloys and hardened steels. However, their high degree of brittleness usually leads to inconsistent results and sudden catastrophic failures. This necessitates a process optimization when machining superalloys with Si3N4 based ceramic cutting tools. The tools are expected to withstand the heat and pressure developed when machining at higher cutting conditions because of their high hardness and melting point. This paper evaluates the performance of α-SiAlON tool in turning Ti-6Al-4V alloy at high cutting conditions, up to 250 m min-1, without coolant. Tool wear, failure modes and temperature were monitored to access the performance of the cutting tool. Test results showed that the performance of α-SiAl0N tool, in terms of tool life, at the cutting conditions investigated is relatively poor due probably to rapid notching and excessive chipping of the cutting edge. These facts are associated with adhesion and diffusion wear rate that tends to weaken the bond strength of the cutting tool.
How to cite this document
Showing items related by title, author, creator and subject.
Influence of thermal and mechanical cycling on the flexural strength of ceramics with titanium or gold alloy frameworks Oyafuso, Denise Kanashiro ; Özcan, Mutlu; Bottino, Marco Antonio ; Itinoche, Marcos Koiti (Dental Materials, 2008) [Artigo]Objectives: The aim of this study was to evaluate the effect of thermal and mechanical cycling alone or in combination, on the flexural strength of ceramic and metallic frameworks cast in gold alloy or titanium. Methods: ...
Bindi, L.; Zaccarini, F.; Garuti, G.; Angeli, N. (Mineralogical Magazine, 2013) [Artigo]Chemical and structural data are reported for platinum-palladium intermediates from two nuggets found at Corrego Bom Sucesso, Minas Gerais, Brazil. Three grains with simple stoichiometries (i.e. PtxPd1 -x with x ∼0.67, ...
Nunes, Perseu Amaral; Ramos, Alfeu Saraiva ; Trindade Ramos, Erika Coaglia (Materials Science Forum, 2012) [Trabalho apresentado em evento]This paper discusses on effect of molybdenum on the Ti6Si2B formation in mechanically alloyed and hot-pressed Ti-xMo-22Si-11B (x= 2, 5, 7 and 10 at%) alloys. High-energy ball milling and hot pressing were utilized to produce ...