About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
Presentation Title |
Microstructure and Mechanical Properties Correlation of Additively Manufactured IN939 Superalloy |
Author(s) |
Md Shahwaz, Merve Nur Dogu, Hengfeng Gu, Dermot Brabazon, Indrani Sen |
On-Site Speaker (Planned) |
Md Shahwaz |
Abstract Scope |
The present study investigates the microstructure and mechanical behavior of IN939 superalloy, fabricated by powder bed fusion-laser beam (PBF-LB). Microstructural analysis identifies Systematic microstructural analysis reveals the presence of gamma, gamma prime, and carbide phases in the alloy. Hardness test indicates higher hardness at the top due to the presence of finer grain size as compared to bottom. Tensile test with DIC is performed at room temperature to assess the strain non-uniformity in the specimen. Tensile tests are also performed at a series of elevated temperatures (750 °C and 850 °C), revealing a direct relationship between yield strength and temperature, thereby indicating towards yield strength anamoly (YSA). Hot compression tests along with detailed fractographic investigations reveal temperature-dependent deformation mechanisms for the superalloy. These findings are crucial for understanding the mechanical performance of additively manufactured IN939 superalloy in high-temperature applications and hence is beneficial for industrial application of the alloy. |