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.

引用

页码：505 / 511

页数：7