Bronz ve dökme demir talaşlarının geri dönüştürülmesiyle prizmatik şekilli makine elemanı üretimi ve mekanik karakterizasyonu

Year 2018, Volume: 33 Issue: 3, 1013 - 1028, 14.08.2018

Abdullah Aslan , Emin Salur Aydın Güneş , Ömer Sinan Şahin Hakan Burak Karadağ , Ahmet Akdemir

https://doi.org/10.17341/gazimmfd.416402

Cited By: 2

Abstract

Bu çalışmada küresel grafitli dökme demir (GGG-40) ve Bronz (CuSn10) talaşlarının izostatik sıcak presleme yöntemiyle geri dönüştürülmesi ile üretilen metal matrisli kompozit malzemelerin (MMK) üretimi ve mekanik davranışları incelenmiştir. MMK malzemeler 4 farklı karışım oranında 3 farklı sıcaklıkta ve 3 farklı basınçta üretilerek üretim parametrelerinin gözeneklilik, sertlik ve eğilme mukavemeti üzerine etkisi incelenmiştir. Prizmatik geometrili olarak üretilen numunelerin öncelikle gözeneklilik ve yoğunluk değerleri tespit edilmiştir. Daha sonra Brinell ve Mikro Vickers ve 3 noktadan eğilme deneyleri ile malzemenin mukavemeti belirlenmiştir. Optik mikroskopi tekniği ile Mikro yapı görüntüleri incelenerek talaşların birleşme mekanizması incelenmiştir. Ayrıca XRD analizi aracılığıyla metalik talaşlar arasında ara faz oluşumu olup olmadığı sorgulanmıştır.  Gözeneklilik deneyleri neticesinde %20 mertebelerinde gözeneklilik elde edilmiştir. Aşırı plastik deformasyon gösteren CuSn10 sebebiyle mukavemeti artan CuSn10 talaşları sertlik değerini Saf CuSn10 ile kıyaslanabilir seviyelere getirmiştir. Eğilme deneyi neticesinde MMK malzemelerin eğilme mukavemetleri saf CuSn10’dan düşük çıkmıştır. Sonuç olarak metal talaşların başarılı bir biçimde metal matris kompozit haline getirilebileceği gösterilmiştir.

Keywords

Metal talaşlar, izostatik sıcak presleme; metal matrisli kompozitler; geri dönüşüm; mekanik karakterizasyon

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