THE FRACTURE-RESISTANCE OF DIRECTIONALLY SOLIDIFIED DUAL-PHASE NIAL REINFORCED WITH REFRACTORY-METALS

被引：96
作者：
HEREDIA, FE
HE, MY
LUCAS, GE
EVANS, AG
DEVE, HE
KONITZER, D
机构：
[1] GE, DIV ENGINE, CINCINNATI, OH USA
[2] THREE M CO, ST PAUL, MN 55144 USA
来源：
ACTA METALLURGICA ET MATERIALIA | 1993年 / 41卷 / 02期
关键词：
D O I：
10.1016/0956-7151(93)90079-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fracture resistance of two directionally-solidified, NiAl refractory metal systems has been measured and analyzed. One system, NiAl/Mo, has a microstructure consisting of Mo rods. The second system, NiAl/Cr(Mo), has a layered microstructure. Both materials are found to have an appreciably higher initiation toughness than NiAl, followed by a rising resistance, with the layered microstructure giving the superior properties. The results have been rationalized by available models based on the following three mechanisms: crack trapping, crack renucleation and ductile phase bridging.
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页码：505 / 511
页数：7
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