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Comparative Study on the Influence of Heat Treatment on Microstructural, Mechanical, and Corrosion Properties of Grade 2 and Grade 5 Titanium Alloys
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DOI：10.1134/S1067821225601406.png)
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Abstract
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The titanium alloys are commonly used in medical, aerospace and automotive industries due to their attractive mechanical properties, corrosion resistance, biocompatibility, and low density. This study incorporates Ti-G2 and Ti-G5 alloys and comprehensively evaluates their mechanical and corrosion behavior after annealing and subsequent aging treatments. The as-received extruded samples were subjected to an annealing process above the beta transus temperature and subjected to different cooling rates, after that aging treatment was conducted at 550 degrees C. The results in this study revealed that the different heat treatment affects the properties and amount of phase transformation of Ti-G5 alloy, however, small variation was detected in Ti-G2 alloy. The heat treatment influenced the size, shape, and morphology of the alpha-phase and varied the properties of the alloys. The hardness, yield strengths, malleability, and corrosion rate of the as-received Ti-G5 alloy are 315 HV, 856.4 MPa, higher than 60%, and 0.66075 & times; 10-3 mm/year, respectively. The corresponding values for the alloy annealed followed by WQ, and aged are 348 HV, 1096.2 MPa, 12.3%, and 0.13474 & times; 10-3 mm/year, respectively. A trade-off between mechanical properties and corrosion was attained.
Keywords:
titanium
Ti grade 2
Ti grade 5
biomedical materials
heat treatment
wear
corrosion
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