About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Addressing the Portevin-Le Chatelier Effect in IN 939 Additively Manufactured Nickel-Based Superalloy |
| Author(s) |
Daniel Moreno, Yohanan Nahmana, Rony Shneck, Moshe Nahmany |
| On-Site Speaker (Planned) |
Daniel Moreno |
| Abstract Scope |
IN939 is a precipitation-hardened nickel-based superalloy, primarily employed over the last few decades for manufacturing high-temperature cast components, such as gas turbine blades/vanes, fuel nozzles, and turbine castings. A specific phenomenon of unstable flow is observed, known as the Portevin-Le Chatelier (PLC) effect has observed in AMed IN939 under constant strain rate tensile tests. Lüders band and PLC bands can be explained by the difference of static strain aging (SSA) and dynamic strain aging (DSA). The dynamic strain ageing effect is characterized by repeated load drops on the stress-strain curve.
The purpose of the present study is to report the fluctuations in stress and strain behavior of the Stress-Strain curve, attributed to the Portevin-Le Chatelier (PLC) effect. The phenomenon has significant implications for understanding the mechanical behavior and performance of materials, particularly in high-stress or high-strain conditions in Ni-base superalloy. |