MICROSTRUCTURAL STUDIES OF TI-AL ALLOYS IN THE VICINITY OF THE EUTECTOID REACTION (ALPHA-]ALPHA-2+GAMMA)

被引：40

作者：

JONES, SA ^{[1
]}

SHULL, RD ^{[1
]}

MCALISTER, AJ ^{[1
]}

KAUFMAN, MJ ^{[1
]}

机构：

[1] NBS,DIV MET,GAITHERSBURG,MD 20899

来源：

SCRIPTA METALLURGICA | 1988年 / 22卷 / 08期

关键词：

DIFFERENTIAL THERMAL ANALYSIS - HEAT TREATMENT - Quenching - MICROSCOPIC EXAMINATION - Transmission Electron Microscopy - TITANIUM ALUMINUM ALLOYS - Heat Treatment - TITANIUM METALLOGRAPHY - Transformations;

D O I：

10.1016/S0036-9748(88)80138-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The development of advanced titanium aluminides for aerospace applications is receiving attention due to their combination of high specific strength (low density), high melting temperature and resistance to oxidation. However, there still exists a degree of uncertainty concerning the Ti-Al binary phase diagram, specifically the phase relationships between the intermetallic compound Ti//3Al ( alpha //2) and the adjacent disordered alpha -Ti and ordered gamma -TiAl phases. In this work binary alloys of Ti-40, -42 and -45 percent Al were studied. The results indicate that the apparent invariant reaction observed during heating is related to transformation of the alpha //2 to alpha and that the eutectoid-like structure is produced by the decomposition of the high-temperature alpha phase via a cellular reaction. 6 Refs.

引用

页码：1235 / 1240

页数：6