About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
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Symposium
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Additive Manufacturing: Microstructure, Defects, and Properties
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Presentation Title |
Addressing the Portevin-Le Chatelier Effect in IN 939 Additively Manufactured Nickel-Based Superalloy |
Author(s) |
Daniel Moreno, Moshe Nahmany, Yohanan Nahmana, Matan Zakai, Orel Yaakoby, Ariel Cohen, Moshe Shapira |
On-Site Speaker (Planned) |
Daniel Moreno |
Abstract Scope |
The relatively recent additive manufacturing (AM) technology of Ni-based superalloys addresses serious problems and optimizes the complexity of engineered parts. IN939 is a precipitation-hardened nickel-based superalloy, employed over the last decades at high-temperature cast components.
A specific phenomenon of unstable flow, known as the Portevin-Le Chatelier (PLC) effect has been observed in AM IN939 under constant strain rate tensile tests. Lüders band and PLC bands can be explained by the difference between static strain aging (SSA) and dynamic strain aging (DSA). The dynamic strain aging 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. |