About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
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| Symposium
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Composition–Processing–Microstructure-Property Relationships of Titanium Alloys
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| Presentation Title |
Microstructure, Mechanical, and Electrochemical Properties of Additively Manufactured Ti-5Al-5V-5Mo-3Cr (wt.%) |
| Author(s) |
Zia Uddin Mahmud, Taylor Kmetz, Luke Rice, Jonathan H. Dwyer, Carl J. Boehlert, Greg Swain |
| On-Site Speaker (Planned) |
Zia Uddin Mahmud |
| Abstract Scope |
The additive manufacturing technique has achieved success in the processing of β-Ti alloys with minimal waste and good control of the diffusion of interstitial elements. Titanium alloys are widely used in a variety of industries, including automotive and aerospace, due to their high strength-to-weight ratio. In the present study, Ti-5Al-5V-5Mo-3Cr (wt.%) alloy specimens were fabricated using layer-by-layer deposition through selective laser melting (SLM). The specimens exhibited a nominal density of 4.55 ± 0.02 g/cm3, suggesting they were 98% dense. X-ray diffraction revealed that both the α and β phases were present. Optical microscopy and scanning electron microscopy showed α precipitates in columnar β matrix. The as-processed material exhibited a yield strength of 707 MPa, and elongation-to-failure of 4%, and a microhardness of 292 HV. Electrochemical characterization of the surface-pretreated alloys revealed reproducible open circuit potentials, polarization resistances, and potentiodynamic polarization curves in naturally aerated 3.5 wt.% NaCl at room temperature. |