| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Titanium-based Materials: Processing, Microstructure and Material Properties
|
| Presentation Title |
Rapid Assessment of the Fatigue Resistance of Electron Beam Melted Ti-6Al-4V Using a Multi-Step Test (MST) |
| Author(s) |
Jacob Pellicotte, Md Abir Hossain, Calvin Stewart |
| On-Site Speaker (Planned) |
Jacob Pellicotte |
| Abstract Scope |
This study aims to rapidly screen the high-temperature fatigue resistance of additively manufactured materials using the multi-step test (MST). Despite the potential of additive manufacturing, the fatigue response is typically determined by testing in triplicates or more to recognize challenges of variability. That said, challenges intensify in high-temperature environments where time-dependent deformation processes are active. To address this, the MST rapidly assesses the fatigue response by subjecting a single specimen to a constant stress amplitude for a fixed number of cycles, step-increasing the stress amplitude, and repeating the process. Testing establishes the stress-strain relationship across stress amplitudes and the limiting stress range where stability breaks down. In this study, six orientations of electron beam melted Ti-6Al-4V specimens are tested using a ten-step MST at 450°C. Quantitative analysis of cycles to failure and strain energy dissipated is performed. The MST utilizes a servo-hydraulic load frame, induction heater, and various microscopy techniques. |