Journal Cover Journal of Metallurgical Engineering
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   ISSN (Print) 2168-555X - ISSN (Online) 2168-5568
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  • Effect of Duplex Heat Treatment on Tribological Behavior of TC21 Titanium
           Alloy

    • Abstract: Effect of Duplex Heat Treatment on Tribological Behavior of TC21 Titanium Alloy
      Pages 1-15
      Author Ramadan N. ElshaerKhaled M. IbrahimAzza F. BarakatReham R. Abba
      The effect of heat treatment on microstructure and tensile properties as well as dry sliding wear behavior on TC21 (Ti-6Al-2Sn-2Zr-3Mo-1Cr-2Nb-Si, wt.%) Ti-alloy was investigated. The samples were solution treated at 900°C for 15 min followed by furnace cooling to 800°C with a cooling rate 1°C/min and holding for 20 min., then the samples cooled down to room temperature either using water quenching (WQ) or air cooling (AC). Consequently, aging treatment was applied at 575°C for 4 hr. Secondary α phase (αs) was precipitated inside the residual β phase due to step cooling from 900°C to 800°C, slow cooling rate by air cooling (AC) as well as aging treatment. The highest wear rate was obtained for WQ samples due to increasing in volume fraction of αp (58%). However, the lowest wear rate was reported for WQ +Aging samples due to the high hardness. Optimum mechanical properties of the studied TC21 Ti-alloy were obtained for AC +Aging condition. A better combination of hardness, tensile properties, and wear resistance was achieved for AC +Aging samples, although their wear resistance was found to be slightly lower than that of WQ +Aging samples.
      PubDate: 2017-0
       
 
 
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