About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
Presentation Title |
Print Defects, Microstructure Evolution and Remnant Porosity for Binder-jet Printed 625 Alloy |
Author(s) |
Chuyuan Zheng, Ian Nettleship, Markus Chmielus |
On-Site Speaker (Planned) |
Ian Nettleship |
Abstract Scope |
Unlike beam-based additive manufacturing technologies, binder-jet printing offers distinct advantages in production rate and microstructure homogeneity. However, printing defects such as inter-layer spacings and printing lines caused by jetting will easily cause remnant porosities in sintered parts and degrade their mechanical properties. In this work, the effects of powder layer spreading and binder jetting on microstructure evolution in pressureless sintering were investigated for 625 alloy. Green and sintered microstructures were characterized by traditional 2D microscopy and also 3D computer tomography. The relationship between the print defects, the evolution of the microstructure and the remnant porosity were quantified. |