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CuAlNi 형상기억합금의 압연조건에 따른 미세조직변화
양권승 조선대학교 생산기술연구소 2005 生産技術硏究 Vol.27 No.1
Shape memory alloy with 83Cu-13Al-4Ni(wt%) composition was prepared by cross rolling method and phase transformation characteristics were investigated. Transformation temperatures are almost the same in specimens prepared by both hot-rolling and cross rolling at 900℃. but. in specimen prepared by cross rolling at 350℃, its transformation temperature shows the change of 40℃ and a large hysteresis. Indesirable tweed-like structure is observed in aged specimen at 200℃ after a cross rolling at 350°C. On aging the specimen prepared by cross rolling, G.P zone was formed easier than that of γ2 phase. This phase was transformed to plate-like θ' phase during aging.