NiTi ŞEKIL BELLEKLI ALAŞIM TOZLARINA MEKANIK ALAŞIMLAMA YÖNTEMI KULLANILARAK ELEMENTEL NI VE TI TOZLARININ İLAVESININ MIKROYAPISAL İNCELENMESI

Sinan Aksöz, Ümit Demir, Hakan Ada, Hakan Gökmeşe, Bülent Bostan
985 280

Öz


Çalışmada, elementel Ni (10µm) - Ti (20µm) tozları ile Nikelce zengin NiTi şekil bellek alaşım tozları 60 dakika mekanik alaşımlama yöntemi ile öğütülmüştür. Öğütme işleminde ilave edilen Ni ve Ti tozlarının önalaşımlı NiTi şekil bellek alaşım tozlarına etkisi araştırılmıştır. Bu amaçla, önalaşımlı NiTi tozları içerisine sırasıyla %2, %4, %6, %8, %10 oranlarında elementel Ni ve Ti tozları mekanik olarak ilave edildi. Mekanik öğütme işleminde 1:10 toz / bilya oranı kullanıldı. Başlangıç tozları ve öğütülen tozlar X-ray (XRD), element dağılım spektrometresi (EDS), taramalı elektron mikroskobu (SEM) kullanılarak karakterize edilmiştir. Çalışma sonucunda, önalaşımlı NiTi tozları ve elementel Ni/Ti tozlarının mekanik öğütme işleminde Ti tozlarının öğütme işleminin daha etkin olduğu tespit edilmiştir.  


Anahtar kelimeler


Mekanik Alaşımlama, NiTi Shape Bellek Alaşımları, Toz Metalurjisi.

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