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| EFFECT OF THERMAL CYCLING ON THERMOELASTIC MARTENSITIC TRANSFORMATION IN A Cu-Zn-Al ALLOY |
| Li Jianchun (Central South Institute of Mining and Metallurgy; Changsha); G. S. Ansell (Rensselaer Polytechnic Institute; Troy; N. Y.; U. S. A.) |
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Cite this article:
Li Jianchun (Central South Institute of Mining and Metallurgy; Changsha); G. S. Ansell (Rensselaer Polytechnic Institute; Troy; N. Y.; U. S. A.). EFFECT OF THERMAL CYCLING ON THERMOELASTIC MARTENSITIC TRANSFORMATION IN A Cu-Zn-Al ALLOY. Acta Metall Sin, 1982, 18(5): 544-639.
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Abstract The effect of thermal cycling between the M_f—A_f temperatures on the thermal hysteresis, temperature dependence, and the morphology of the martensitic transformation in Cu-Zn-Al alloy was studied. It showed that the hysteresis behaviour of cyclic transformation changed, M, and A_f temperature shifted to higher temperatures while the M_f and A_s temperatures remained constant. The amount of martensite undergoing cyclic transformation decreased. These changes appeared to saturate at 300 cycles and could be partly recovered during room temperature holding. The morphology and mode of transformation also changed. During the second cycling transformation occurred in two ways: martensite needles grow in a continuous manner and in a "burst" process. After 60 cycles no burst type transformation occurred during further cycling.
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Received: 18 May 1982
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5 Easterling, K. E.; Miekk-oja, H. M., Acta Metall., 15 (1967) , 1133． |
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