INTERMETALLIC TI-AL-NB ALLOYS BASED ON STRENGTHENING OF THE ORTHORHOMBIC PHASE BY OMEGA-TYPE PHASES

被引：16
作者：
BENDERSKY, LA
BOETTINGER, WJ
BIANCANIELLO, FS
机构：
[1] Metallurgy Division, National Institute of Standards and Technology, Gaitherg
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1992年 / 152卷 / 1-2期
关键词：
D O I：
10.1016/0921-5093(92)90044-2
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure of an alloy, with composition Ti-30Al-20Nb (atomic percent), when annealed at temperatures between 700 and 900-degrees-C for up to 18 days, consists of two intermetallic phases: orthorhombic Ti2AlNb and omega-type B8(2)Ti4Al3Nb. The presence of the two phases in the microstructure is independent of the heat treatment path and, thus, the two phases appear to be in thermodynamic equilibrium. The potential for high strength alloys in this two-phase field, based on the combination of properties of the two different phases, is demonstrated by microhardness measurements.
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页码：41 / 47
页数：7
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