Influence of the Sign of the γ/γ' Misfit on the Structure and Creep Strength of Single Crystals of Nickel-Based Superalloys

被引：0
|
作者：
Petrushin, N. V. [1 ]
Epishin, A. I. [2 ]
Svetlov, I. L. [1 ]
Nolze, G. [3 ]
Elyutin, E. S. [1 ]
Solov'ev, A. E. [1 ]
机构：
[1] All Russian Sci Res Inst Aviat Mat, Kurchatov Inst, Natl Res Ctr, Moscow 105005, Russia
[2] Russian Acad Sci, Merzhanov Inst Struct Macrokinet & Mat Sci Problem, Chernogolovka 142432, Moscow Oblast, Russia
[3] BAM Fed Inst Mat Res & Testing, D-12205 Berlin, Germany
来源：
INORGANIC MATERIALS-APPLIED RESEARCH | 2023年 / 14卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
nickel-based superalloys; single crystal; creep; creep strength; microstructure; gamma/gamma' misfit; TEMPERATURE-DEPENDENCE; LATTICE MISFIT; CMSX-4;
D O I：
10.1134/S207511332301029X
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Using the method of directional solidification, single crystals of experimental nickel-based superalloys with negative, zero, and positive gamma/gamma' misfits are obtained. The gamma' solvus, solidus, and liquidus temperatures of the alloys are determined, and the microstructures of the alloys after directional solidification, heat treatment, and creep tests are investigated. Creep tests are performed at temperatures of 800 and 1000 degrees C. It is found that single crystals of the alloy with a negative gamma/gamma' misfit have the highest creep resistance and lifetime (the crystal lattice period of the gamma' phase is smaller than that of the gamma matrix).
引用
收藏
页码：13 / 22
页数：10
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