A Preliminary Study of Chemical Solubility of Ultra-Hard Ceramic AlMgB14 in Titanium: Reconciliation of Model with Experiment |
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| Authors: | Deepak G Bhat Vikram A Bedekar Stephen A Batzer |
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| Affiliation: |
a Department of Mechanical Engineering, University of Arkansas, Fayetteville, Arkansas, USA
b Timken Company, Canton, Ohio, USA
c Renfroe Engineering, Farmington, AR, USA |
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| Abstract: | This article investigates the chemical wear behavior of the ultra-hard ceramic AlMgB14 and cemented tungsten carbide for machining aerospace alloys. The chemical interdiffusivity of AlMgB14 against pure Ti and Ti-6Al-4V, in comparison with cemented carbide (WC-6%Co) cutting tool was investigated by means of diffusion couple experiments. The chemical composition profiles of various tool-workpiece combinations were determined by electron probe microanalysis after exposing the couples to 1000°C for 120 h in vacuum. Thermodynamic calculations of the chemical solubility of AlMgB14 show that the experimental diffusion results are in reasonable agreement with the predicted behavior. It is shown that AlMgB14 is significantly less soluble in titanium under static diffusion conditions, and therefore, shows considerable promise as a potential cutting tool for machining Ti alloys. |
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