About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Processing, Microstructure and Material Properties of Titanium-based Materials
|
| Presentation Title |
Influence of Thermal Treatments on the Microstructure and Mechanical Properties of Ti-6Al-4V Built by Electron Beam Melting (EBM) |
| Author(s) |
K.S.N. Sesha, Kenta Yamanaka, Kenta Aoyagi, Akihiko Chiba |
| On-Site Speaker (Planned) |
K.S.N. Sesha |
| Abstract Scope |
Effect of thermal treatments on the microstructure and mechanical properties of Ti-6Al-4V parts built by electron beam melting (EBM) additive manufacturing were investigated. As-built specimens were heat-treated at 800-980 °C for 2hrs followed by water quenching. As-built specimens showed acicular α phase with a small amount of β phase microstructure. The martensitic transformation from the β phase to α' phase at temperatures above 900 °C, while the retained β phase was observed after quenching from 800 °C and 850 °C. The improved yield strength and tensile strength were observed in specimens heat-treated above 900 ℃, while the lower yield strength and significant work-hardening and enhanced elongation-to-failure were attained in specimens heat-treated at 800 ℃ and 850 ℃. Formation of soft athermal α'' martensite and athermal ω phase was observed in specimen heat-treated at 850 ℃. The Correlation between phase formation and mechanical properties was studied in detail. |