EFFECT OF COMPOSITION AND HEAT TREATMENT ON PHASE CONSTITUENT AND ORDERING STATE IN CuAlNi ALLOYS

Abstract

Abstract: The effect of composition and heat treatment on the phase constituent,the size of B2-and DO_3 derived domains and martensitic thermoelastic behaviour in three CuAlNi alloys have been studied by means of metallography,TEM anti X-ray diffraction analyses.It is shown that the structure of martensite changes from 18R_1 into 2H and the transition temperature decreases with the increase of the Al content.Moreover,the size of the B2 and DO_3 derived domains decreases with the increase of cooling rate.

Key words: CuAlNi alloy, shape memory alloy, martensitic transformation

GUI Jianian REN Qiang WANG Renhui Wuhan University,Wuhan,China. EFFECT OF COMPOSITION AND HEAT TREATMENT ON PHASE CONSTITUENT AND ORDERING STATE IN CuAlNi ALLOYS[J]. Acta Metallurgica Sinica (English Letters), 1991, 4(6): 446-452.

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EFFECT OF COMPOSITION AND HEAT TREATMENT ON PHASE CONSTITUENT AND ORDERING STATE IN CuAlNi ALLOYS

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