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| AN INTERNAL FRICTION PEAK RELATED TO δ-FERRITE IN A Cr-Ni-Mo-Ti HEAT-RESISTING STEEL |
| KUNG CHING-PING;LIU SHAO-KU Institute of Metal Research; Academia Sinica |
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Cite this article:
KUNG CHING-PING;LIU SHAO-KU Institute of Metal Research; Academia Sinica. AN INTERNAL FRICTION PEAK RELATED TO δ-FERRITE IN A Cr-Ni-Mo-Ti HEAT-RESISTING STEEL. Acta Metall Sin, 1965, 8(2): 228-231.
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Abstract The internal friction in an 18-8-3-1 Cr-Ni--Mo-Ti heat-resisting steel was measuredwith a torsion pendulum, and an internal friction peak around 520℃ was observed. Theheight of the peak was found to increase with the content of δ-ferrite in the specimens.The peak disappeared after the δ-ferrite all decomposed. This indicates that, this peakis associated with the presence of δ-ferrite in the specimen. The activation energy asso-ciated with this peak was measured to be 95,000 (±5,000) calories per mole by themethod of changing frequency. It is suggested that the internal friction peak is a bulkeffect of δ-ferrite in the specimen, and it may be induced by some diffusion process inδ-ferrite.
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Received: 18 February 1965
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