About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Enhancement and Synergy with Traditional Methods
|
| Presentation Title |
Design of Additively Manufactured Preforms for Hot Forging. |
| Author(s) |
Vignesh Asam, Showmik Ahsan, Ahsan Mian, Raghu Srinivasan, Henry D Young |
| On-Site Speaker (Planned) |
Vignesh Asam |
| Abstract Scope |
The hot forging of high strength components requires deforming a simple shaped billet into a complex final forging through multistep operations. The intermediate shapes also need to have geometries that are forgeable. Manufacturing and testing of intermediate dies are a costly time-consuming process. Additive manufacturing methods, such as LPBF, offer a new path to the manufacture of preforms that can be directly forged to the final forging. Since LPBF essentially creates a cast microstructure with associated defects, a new approach to design preforms which, upon forging, result in sufficient strain to cause recrystallization of the cast structure to a fine-grained structure while avoiding forging defects such as folds and incomplete die fill. A surface spline approach is used to model the shape of the preform. This shape is modified through an iterative process that adjusts the control points of the spline in a manner that creates optimized preform shape. |