| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and Measurement
|
| Presentation Title |
Characterization of 3D-printed Metals with Ultrasonic Technique |
| Author(s) |
Terence Costigan, Ping-Chuan Wang, Rob Van Pelt |
| On-Site Speaker (Planned) |
Terence Costigan |
| Abstract Scope |
Additive manufacturing (AM) of metals is rapidly finding applications in various industries due to its ability to make complex geometries and reduced prototyping cost. However, certain disadvantages inherited in AM prevent it from becoming widely adopted, including surface roughness, lack of isotropic densification and dimension accuracy, etc. Such imperfections have significant impact on product performance and reliability. The goal for this research is to utilize ultrasonic excitation as the means for diagnosing such impact. The methodology currently under development employs a pair of conical stainless steel specimens with piezoelectric transducers sandwiched in between to induce vibration. In this presentation, feasibility of proposed test and the specimen design considerations will first be demonstrated with finite element modeling. Experimental results comparing between specimens prepared by AM and traditional subtractive machining process will be summarized, and the implication on nondestructive ultrasonic characterization of AM structures will be discussed. |