THE CHANGES ON MARTENSITIC TRANSFORMATION TEMPERATURES OF SHAPE MEMORY CoNiAl ALLOYS UNDER DIFFRENT EFFECTS

Öz

Co-based shape memory alloys such as ConiAl and CoNiGa are suitable for commercial applications. The uses of Co-based shape memory materials can be grouped as aerospace and aviation industry, automative industry and medical applications. They are preferred as performance enhances especially in mechanical tools, spreading materia, turbine engine, robotic instruments and air-conditioning industry. In this work, the change of transformation temperatures dealing with the composition of Co-based shape memory alloys and experimental procedures performed on the materials was examined by compiling the literature studies performed in this field. The results, obtained by examining the searchs on Co-based shape memory alloys were summarized.

Anahtar Kelimeler

• Martensitic Trasformation, Shape-Memory Effect, Co-based Alloys, Transformation Temperatures., ALLOYING ELEMENT,

FARKLI ETKYLER ALTINDA ?EKYL HATIRLAMALI CoNiAl ALA?IMLARININ MARTENSYTYK DÖNÜ?ÜM SICAKLIKLARINDAKY DE?Y?YMLER

Öz

CoNiAl ve CoNiGa gibi Co bazly ?ekil hatyrlamaly ala?ymlar ticari ?ekil hatyrlama uygulamalary için kullany?lydyr. Co bazly ?ekil hatyrlamaly malzemelerin kullanym alanlary syrasyyla uzay ve havacylyk endüstrisi, otomotiv endüstrisi ve tybbi uygulamalar olarak gruplandyrylabilir. Özellikle mekanik araçlarda yay malzemesi, türbin motoru, robotik aletler ve klima sanayinde performans arttyrycy olarak tercih edilmektedir. Bu çaly?mada ?ekil hatyrlamaly Co bazly ala?ymlaryn kompozisyonuna ve malzeme üzerine uygulanan deneysel i?lemlere göre dönü?üm sycaklyklarynyn de?i?imi bu konuda yapylmy? literatür çaly?malary derlenerek incelendi. ?ekil hatyrlamaly Co bazly ala?ymlar üzerine yapylan ara?tyrmalaryn incelemesi ile elde edilen sonuçlar özetlendi.

Anahtar Kelimeler

• Martensitik Dönü?üm, ?ekil hatyrlama Etkisi, Co bazly ala?ymlar, Dönü?üm Sycaklyklary, ALA?IMLAMA ELEMENTLERY,