THERMODYNAMICS OF MARTENSITIC TRANSFORMATION IN β-Cu BASE ALLOYS

Abstract

Abstract: An approach for the thermodynamics of the thermoelastic martensitic transformation in β-Cu base alloys is suggested.Driving forces for martensitic transformation,T_0 and M_s tempera- tures in Cu-Zn,Cu-Al and Cu-Zn-Al alloys were calculated and the calculated M_s are in good agreement with the experimental ones.Ordering of the parent phase lowers M_s(T_0)in Cu-Zn and Cu-Zn-Al alloys,but raises M_s(T_0)in Cu-Al alloys.Two methods for the es- timation of the critical driving force for the thermoelastic martensitic transformation are also introduced.

Key words: β-Cu base alloy, martensitic transformation, thermodynamics

XU Zuyao (T.Y.Hsu) ZHOU Xiaowang~** Department of Materials Science,Shanghai Jiaotong University,Shanghai,China Now at Department of Materials Strength (Department No.1),Shanghai Research Institute of Materials,Shanghai,200030 China. THERMODYNAMICS OF MARTENSITIC TRANSFORMATION IN β-Cu BASE ALLOYS[J]. Acta Metallurgica Sinica (English Letters), 1991, 4(6): 401-406.

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THERMODYNAMICS OF MARTENSITIC TRANSFORMATION IN β-Cu BASE ALLOYS

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