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673K Embrittlement of Ferritic Spheroidal Graphite Cast Iron

Published online by Cambridge University Press:  21 February 2011

O. Yanagisawa  and
T. S. Lui
O. Yanagisawa
Affiliation:
Faculty of Engineering, Hiroshima University, Saijo-Shitami, Higashi-Hiroshima, 724, Japan.
T. S. Lui
Affiliation:
Faculty of Engineering, Hiroshima University, Saijo-Shitami, Higashi-Hiroshima, 724, Japan.
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Abstract

Intergranular fracture had been observed in the temperature range from 573K – 673K, where the ductilit miniTum appears at 673K for the strain rate of sec−1 in ferritic spheroidal graphite cast irons.

The cause of intergranular fracture at about 673K has been investigated. The following two points are emphasized. The first is the role of hydrostatic tensile stress in triaxial stress field developed in ferrite matrix among graphite nodules, relating to the effect of graphite volume fraction on the intergranular fracture. The second is the role of carbide precipitation during dynamic strain ageing, relating to the strain rate and the temperature dependence of the intergranular fracture.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 34: Symposium – Physical Metallurgy of Cast Iron , 1984 , 527
Copyright
Copyright © Materials Research Society 1985

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References

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