Nanoscale lamellar gamma/gamma ' structure and preferred distribution of oxide particles in a new ODS superalloy

作者：Aghamiri S M Seyyed; Shahverdi H R^*; Ukai S; Oono N; Ahmadabadi M Nili; Okuda T

来源：Materials Letters, 2015, 161: 568-571.

DOI：10.1016/j.matlet.2015.08.107

• Metals and Alloys
• Ni-Based ODS Superalloy
• Microstructure
• Lamellar gamma/gamma ' Structure
• Y2Hf2O7 Oxide Particles

Two microstructural phenomena have been studied in a newly designed Ni-based ODS superalloy with a high solvus temperature. For the first time, a nanoscale lamellar gamma/gamma' structure was obtained along the elastically soft [100] direction by a eutectoid-like reaction from a severely deformed matrix. In addition, the preferred distribution of semi-coherent Y2Hf2O7 oxide particles was observed only in the gamma phase due to the prior partitioning of Y and O to this phase. The microstructure development during the processing route is discussed based on the solvus temperature of this new ODS superalloy in comparison to commercial ODS superalloys.

• 出版日期2015-12-15