Paper Title:
Evaluation of the Performance of α-SiAlON Tool when Turning Ti–6Al–4V Alloy without Coolant
  Abstract

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-SiAlON 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.

  Info
Periodical
Materials Science Forum (Volumes 591-593)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
554-559
DOI
10.4028/www.scientific.net/MSF.591-593.554
Citation
J. V. C. Souza, M. do C. de A. Nono, S. L. Mineiro, M.V. Ribeiro, O. M. M. Silva, "Evaluation of the Performance of α-SiAlON Tool when Turning Ti–6Al–4V Alloy without Coolant", Materials Science Forum, Vols. 591-593, pp. 554-559, 2008
Online since
August 2008
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Price
$32.00
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