About this Abstract |
Meeting |
Superalloys 2024
|
Symposium
|
Superalloys 2024
|
Presentation Title |
B-1: Effect of Grain Boundary Serrations on Creep Deformation of Udimet-720Li Superalloy |
Author(s) |
Tso-Wei Chen, Bo-Chen Wu, Hideyuki Murakami, Yoshiaki Toda, An-Chou Yeh, Yung-Chang Kang |
On-Site Speaker (Planned) |
Tso-Wei Chen |
Abstract Scope |
This article investigates grain boundary serration and its effects on high-temperature creep behavior of Udimet-720Li. Grain boundary serration is induced by controlled cooling during heat treatments, with continuous and discontinuous precipitation of γ′ phase identified as the competing mechanisms affecting serration formation. Continuous precipitation of coarse γ′ particles pin grain boundaries and leads to a slight serration termed the continuous precipitation type (type-I) boundary, while discontinuous reaction forming cellular γ/γ′ behind the mobile grain boundary causes larger serration known as the discontinuous precipitation type (Type-II) boundary. Samples with straight (STB), Type-I (SRB-1), Type-II (SRB-2) grain boundaries were produced, and creep behaviors under 700 °C/700MPa were investigated. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |