Influence of microstructure on the oxidation behaviour of the Ni-based single crystal superalloy AM1 between 850 and 1050 °C in air

被引：7
作者：
Martin, Angeline [1 ,2 ,3 ]
Cormier, Jonathan [2 ]
Rame, Jerermy [3 ,4 ]
Drouelle, Elodie [3 ]
Pedraza, Fernando [1 ]
机构：
[1] Rochelle Univ, Lab Sci Ingenieur Environm LaSIE, UMR CNRS 7356, Ave Michel Crepeau, F-17042 Rochelle 1, France
[2] Inst Pprime, ISAE ENSMA, Phys & Mech Mat Dept, UPR CNRS 3346, 1 Ave Clement Ader,BP 40109, F-86961 Futuroscope, France
[3] Safran Aircraft Engines, Site Gennevilliers,171 Blvd Valmy, F-92700 Colombes, France
[4] NAAREA, F-92016 Nanterre, France
来源：
CORROSION SCIENCE | 2024年 / 229卷
关键词：
Superalloy; Single crystal; AM1; Microstructure; High temperature oxidation; Transient oxidation; HIGH-TEMPERATURE OXIDATION; ALUMINA SCALE; OXIDE SCALES; GROWTH; KINETICS; SYSTEMS; PHASE; LAYER;
D O I：
10.1016/j.corsci.2024.111872
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of the as-cast and fully heat-treated microstructures on the isothermal behaviour of the Ni-based single crystal superalloy AM1 was investigated at 850-1050 degrees C. It appears that the kinetics transition regime is a function of time, temperature and also of bulk microstructure. The various characterisation techniques allowed elucidating that the growth of a continuous inner layer of alpha-Al2O3 governs the oxidation mechanisms, irrespective of the microstructure. Such layer is favoured for high oxidation temperatures, long exposure times and high gamma' precipitate surface fraction. However, the chemical segregation of the as-cast state is responsible for the growth of inhomogeneous oxide layers.
引用
收藏
页数：11
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