Hot corrosion behaviour of (γ + α2)-Ti-46Al-8Nb (at.%) and α-Ti-6Al-1Mn (at.%) alloys

被引：41
|
作者：
Mitoraj-Krolikowska, Marzena [1 ]
Godlewska, Elzbieta [1 ]
机构：
[1] AGH Univ Sci & Technol, Al Mickiewicza 30, PL-30059 Krakow, Poland
来源：
CORROSION SCIENCE | 2017年 / 115卷
关键词：
Titanium; SEM; Hot corrosion; OXIDATION BEHAVIOR; HIGH-TEMPERATURE; TITANIUM ALUMINIDES; TIAL ALLOYS; INTERMETALLICS; DIFFUSION; ENVIRONMENT; SUPERALLOY; OXYGEN; AIR;
D O I：
10.1016/j.corsci.2016.11.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hot corrosion behaviour of (gamma + alpha(2))-Ti-46Al-8Nb (at.%) and alpha-Ti-6Al-1 Mn (at.%) alloys was investigated in thermal cyclic conditions at 700, 800 and 900 degrees C. The samples were intentionally contaminated with Na2SO4 or NaCI or with a mixture of these. The corrosion rate was evaluated on the basis of mass change measurements. Degradation of materials was examined at the surface and on cross-sections by scanning electron microscopy (SEM). The chemical and phase composition of scale was determined with energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). It has been demonstrated that both (gamma+alpha(2))-Ti-46Al-8Nb (at.%) and alpha-Ti-6Al-1 Mn (at.%) are not resistant to hot corrosion. Remarkable mass changes of samples accompanied by intensive scale spallation was observed especially with sodium chloride deposit. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：18 / 29
页数：12
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