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| INTERNAL FRICTION ASSOCIATED WITH MARTENSITIC TRANSFORMATION OF ASCAST MANGANESE-COPPER ALLOYS |
| XIE Cunyi;WEN Yiting;ZHU Xianfang Institute of Solid State Physics; Academia Sinica; Hefei |
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Cite this article:
XIE Cunyi;WEN Yiting;ZHU Xianfang Institute of Solid State Physics; Academia Sinica; Hefei. INTERNAL FRICTION ASSOCIATED WITH MARTENSITIC TRANSFORMATION OF ASCAST MANGANESE-COPPER ALLOYS. Acta Metall Sin, 1988, 24(2): 71-75.
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Abstract Internal friction of martensitic transformation of as-cast manga-nese-copper alloys with Mn-content 90% was studied. Results show that the peak tem-perature of the stable peak (T=0) at low frequencies is independent of the mea-suring frequency, but the peak height decreases with increasing frequency. It is,therefore, not of a static hysteresis mechanism. The peak height is dependent onT and f at a constant heating or cooling rate, but it does not show a linear rela-tionship with T, 1/f or T/f. The peak height is independent of the strain amplitudein the range (A_e: 1×10~(-5)-1×10~(-4)). Consequently the low frequency internal fric-tion of martensitic transformation is not only a volume effect, but also a surfaceeffect connected with coherent boundaries.
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Received: 18 February 1988
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