About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
|
Additive Manufacturing: Processing, Microstructure and Material Properties of Titanium-based Materials
|
Presentation Title |
Effect of Pores Present in Very Low Volume Fraction on Tensile Properties of Additively Manufactured Titanium Alloys |
Author(s) |
Pankaj Kumar, K.S. Ravi Chandran |
On-Site Speaker (Planned) |
Pankaj Kumar |
Abstract Scope |
Additive manufacturing (AM) has emerged as a technique to manufacture complex geometry components in ready-to-use conditions. However, the major difficulty is the formation of geometrical defects such as pores of varying sizes, but in very low volume fraction, and their effect on the mechanical properties. In this study, the effect of residual pores (volume fraction <1%) on the tensile properties are rationalized by modeling the tensile deformation characteristics in the presence of pores in a PM manufactured Ti-6Al-4V alloy. This study demonstrates that tensile ductility is severely affected by the size of the largest pores present in the volume of the material. The strain localization and crack initiation due to the largest pore, limit the extent of uniform plastic deformation, thus, ductility. A simple analytical model is presented to elucidate how the ductility is influenced by the largest pores present in AM materials. |