THE OXIDATION BEHAVIOR OF GAMMA-TITANIUM ALUMINIDE ALLOYS UNDER THERMAL CYCLING CONDITIONS

被引：106
作者：
MCKEE, DW
HUANG, SC
机构：
[1] Corporate Research, Development Center, General Electric Company, Schenectady, NY 12301
来源：
CORROSION SCIENCE | 1992年 / 33卷 / 12期
关键词：
D O I：
10.1016/0010-938X(92)90192-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behavior of a number of ternary and quaternary gamma-TiAl alloys in air has been studied under rapid thermal cycling conditions for periods of hundreds of hours in the temperature range 850-1000-degrees-C. The ability of the gamma-TiAl alloys to form a protective alumina scale on oxidation was found to be much influenced by the presence of low concentrations of other elements, binary combinations of which were often more effective in promoting oxidation-resistance than single element additions. For example, whereas the alloys Ti-48Al-4Cr and Ti-48Al-4Ta formed spalling unprotective TiO2-Al2O3 scales at 850-degrees-C, Ti-48Al-4Nb, Ti-48Al-4W and the quaternary alloys Ti-48Al-2Cr-2Nb and Ti-48Al-2Mn-2W formed protective Al2O3 scales. The alumina-forming alloys Ti-48Al-16Cr, Ti-48Al-12Nb and Ti-48Al-2Cr-6Ta were very oxidation-resistant even at 900-degrees-C.
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页码：1899 / 1914
页数：16
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