About this Abstract |
Meeting |
2021 AWS Professional Program
|
Symposium
|
2021 AWS Professional Program
|
Presentation Title |
Low Transformation Temperature Steel Wire Arc Additive Manufacturing and Characterization |
Author(s) |
Wei Tang, Alex Plotkowski, Andrzej Nycz, Hsin Wang, Christopher Fancher, Yousub Lee, Peeyush Nandwana |
On-Site Speaker (Planned) |
Wei Tang |
Abstract Scope |
A low transformation temperature (LTT) steel filler wire LTTCrNi-01 was used for wire arc additive manufacturing (AM), and a wall component with dimensions of 8.3” L X 5.6” H X 0.5” W was built. Microstructures of the AM built wall were characterized by optical microscopy (OM) and scanning electron microscopy (SEM), specifically focusing on macro- and microstructural inhomogeneity attributed to the nature of wire-arc AM approach by using metallographic specimens obtained from different locations of the AM built wall. General grain structures observed under the OM, as well as more detailed characterizations including phases and chemical compositions from the SEM/electron backscatter diffraction (EBSD)/energy dispersive X-ray spectroscopy (EDS), were discussed. The phase transformation and thermal properties of the LTT AM built steel are to be correlated with the characterization results. Microhardness testing was performed on different passes and layers of the AM built wall specimens to reveal thermal history associated hardness distribution. Tensile tests at room temperature and elevated temperatures were also performed to obtain and study the LTT AM built wall component tensile properties at different temperatures. Thermal properties and tensile properties at elevated temperatures obtain in this study will be used for future computer modeling of the AM process. |
Proceedings Inclusion? |
Definite: Other |