| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Energy-efficient 4D Printing of Green Metals |
| Author(s) |
Chaolin Tan |
| On-Site Speaker (Planned) |
Chaolin Tan |
| Abstract Scope |
The unique cyclic thermal history in laser additive manufacturing (LAM) induces intrinsic heat treatment (IHT) on materials during deposition, which sheds light on developing LAM-customized new materials. This work will leverage IHT for materials performance enhancement and new materials development for energy-efficient 4D printing. A novel Fe-Ni-Ti-Al maraging steel is customized by machine learning to leverage the IHT effect for in-situ formation of massive precipitates during LAM. Fast precipitation kinetics and the IHT effect during subsequent layer depositions facilitate the heterogeneous nucleation of Ni3Ti precipitates on dislocations. The as-built steel achieves a tensile strength of 1538 MPa and a uniform elongation of 8.1%, which is superior to a wide range of as-LAM-processed high-strength steel. This work highlights in-situ 4D printing via in-situ integration of time-dependent precipitation hardening with 3D geometry shaping, which shows high energy efficiency and sustainability. |