Room- and elevated-temperature fatigue crack growth in damage tolerant niobium aluminide intermetallics

被引：0
|
作者：
Ye, F [1 ]
DiPasquale, J [1 ]
Soboyejo, WO [1 ]
机构：
[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA
来源：
CREEP AND FRACTURE OF ENGINEERING MATERIALS AND STRUCTURES | 1996年
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D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The effects of temperature on the fatigue crack growth behavior of damage tolerant niobium aluminide intermetallics (Nb-15Al-40Ti and Nb-12.5Al-41Ti-1.5Mo) are discussed in this paper (compositions quoted in atomic % unless stated others). Room-temperature fatigue crack growth rates in this alloy are shown to be comparable to those in pure Nb and mill annealed Ti-6Al-4V. However, the fatigue crack growth rates in laboratory air at 750 degrees C are slower than the room-temperature fatigue crack growth rates in the near-threshold regime. The slower elevated-temperature crack growth rates are attributed to the combined effects of oxide-induced crack closure and crack-tip blunting.
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页码：521 / 530
页数：10
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