| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-104: Effects of the Energy Density and Building Angle on the Tensile Properties of SLM Ti-6Al-4V Alloys |
| Author(s) |
Jungsub Lee, Woojin An, Imdoo Jung, Jusik Kim, Sangshik Kim, Hyokyung Sung |
| On-Site Speaker (Planned) |
Jungsub Lee |
| Abstract Scope |
Effects of the process parameters on the microstructure and tensile properties of SLM Ti-6Al-4V alloys were investigated. We had control the laser power and scan speed to control the energy density (93, 103 and 112 W). In H and L specimen, two different heights of 30 and 10 mm were employed. Lamellar colony microstructures were formed due to solidification from β transus temperature. Lamellar thickness increased with increasing energy density. Yield and tensile strengths were about 800~850 MPa and 950~1000 MPa, but the elongation of L specimens were somewhat higher (2~3%) due to fast heat release rate. In the effect of building angle (0°, 45° and 90°), the elongation was the highest in 90° specimen due to its smooth surface. In the surface GOS value was lower due to fast cooling rate affected by high surface roughness, and brittle fracture was evident which deteriorates the tensile elongation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |