NiTi ŞBA Tozlarında B2-R-B19' Fazlarına Sıcaklık ve Deformasyonun Etkilerinin İncelenmesi

Sinan Aksöz; Gülizar Altınışık; Ekrem Emre Elverişli; Bülent Bostan

doi:10.29109/gujsc.387674

NiTi ŞBA Tozlarında B2-R-B19' Fazlarına Sıcaklık ve Deformasyonun Etkilerinin İncelenmesi

Öz

Çalışmada, önalaşımlı NiTi şekil bellekli alaşım (ŞBA) tozlarına oda sıcaklığında (25°C), 100°C’de ve 200°C’de, farklı deformasyon oranlarına (800MPa, 1300MPa, 1600MPa, 1800MPa, 2000MPa, 2500MPa) deformasyon uygulanmıştır. Çalışmada uygulanan deformasyonun etkilerini tespit edebilmek için ise; DSC, XRD analizleri yapılmış ve optik mikroskop görüntüleri incelenmiştir.

Oda sıcaklığında yapılan deformasyon neticesinde yapıda B₂ ↔ R ve R ↔ B19' çift fazlı dönüşümü görülürken, 100°C’de ve 200°C’de yapılan deformasyonlar sonrası yapıda yalnızca B₂↔ R dönüşümü görülmüştür. Numunelerin XRD analizleri incelendiğinde ise, ham tozlarda görülen B₂ (östenit) fazları deformasyon oranına bağlı olarak pik şiddetleri düşmeye başlamış, en düşük B₂ piki en yüksek deformasyon oranında tespit edilmiştir. XRD pik şiddetindeki düşüşün nedeni ise artan deformasyon oranına bağlı olarak, östenit pikinin şiddetinin azalmasına ve martenzit pik şiddetlerinin ise oluşmaya başlaması olarak söylenebilir.

Anahtar Kelimeler

NiTi ŞBA,Sıcak Deformasyon,Soğuk Deformasyon

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Details

Primary Language

Turkish

Subjects

Engineering

Journal Section

Research Article

Authors

Sinan Aksöz ^*
PAMUKKALE ÜNİVERSİTESİ
0000-0003-4324-5043
Türkiye

Gülizar Altınışık This is me
Türkiye

Ekrem Emre Elverişli
Türkiye

Bülent Bostan
0000-0002-6114-875X
Türkiye

Publication Date

September 30, 2018

Submission Date

January 31, 2018

Acceptance Date

June 8, 2018

Published in Issue

Year 2018 Volume: 6 Number: 3

DOI

https://doi.org/10.29109/gujsc.387674

IZ

https://izlik.org/JA49JH57UF

Cite

RIS / Bibtex

APA

Aksöz, S., Altınışık, G., Elverişli, E. E., & Bostan, B. (2018). NiTi ŞBA Tozlarında B2-R-B19’ Fazlarına Sıcaklık ve Deformasyonun Etkilerinin İncelenmesi. Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji, 6(3), 570-580. https://doi.org/10.29109/gujsc.387674

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