EFFECT OF HYDROSTATIC-PRESSURE ON MARTENSITIC TRANSFORMATIONS IN FE-NI AND FE-NI-C ALLOYS

被引：21
作者：
KAKESHITA, T
SHIMIZU, K
AKAHAMA, Y
ENDO, S
FUJITA, FE
机构：
[1] OSAKA UNIV,EXTREME MAT RES CTR,TOYONAKA,OSAKA 560,JAPAN
[2] OSAKA UNIV,FAC ENGN SCI,DEPT MAT PHYS,TOYONAKA,OSAKA 560,JAPAN
来源：
TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS | 1988年 / 29卷 / 02期
关键词：
ELECTRIC CONDUCTIVITY - IRON AND STEEL METALLOGRAPHY - Transformations;
D O I：
10.2320/matertrans1960.29.109
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Effects of hydrostatic pressure on martensitic transformations in Fe-29. 9Ni and Fe-24. 6Ni-1. 8C (at%) alloys have been investigated by electrical resistivity and magnetization measurements and optical microscopy under a pressure of up to 1. 5 GPa. As a result, the followings were found: Transformation temperatures under hydrostatic pressure shift from that under no pressure. The amount of the shift increases curvilinearly with increasing hydrostatic pressure. Morphology of the hydrostatic pressure-induced martenites is the same as that of the thermally-induced ones irrespective of formation temperature. A thermodynamical analysis for the hydrostatic pressure dependence of the transformation temperature shows that other effects should be taken into consideration besides that in which that the volume expansion associated with the martensitic transformation is opposed to hydrostatic pressure.
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页码：109 / 115
页数：7
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