Çok yönlü dövme ve yaşlandırma işlemlerinin Cu-Co-Be-Ni alaşımının darbe davranışına olan etkisinin incelenmesi

Öz

Bu çalışma kapsamında Cu-Co-Be-Ni alaşımına çözündürme, çok yönlü dövme (ÇYD) ve yaşlandırma işlemlerinin farklı kombinasyonlarını içeren işlem adımları uygulanmıştır. Uygulanan işlem adımları sonrası elde edilen farklı örneklerin mikroyapısal değişimi, mekanik özellikleri ve kırılma enerjisi (darbe sönüm kapasitesi) üzerindeki etkileri sistematik bir şekilde araştırılmıştır. Farklı prosesler kapsamında uygulanan işlem adımlarının alaşımın gerek mekanik gerekse mikroyapısal özellikleri üzerinde oldukça etkili olduğu görüldü. En iyi sertlik ve mukavemet değerleri sırasıyla uygulanan çözündürme, ÇYD ve yaşlandırma işlemleri sonrasında elde edilirken, kırılma tokluğunun ise bu yapıda daha düşük olduğu saptandı. Özetle, ÇYD etkisiyle yapıda oluşturulan tane incelmesi ve dislokasyon artışı ve yaşlandırma sonrası çökelti oluşumuna bağlı olarak alaşımın mekanik özellikleri iyileştirilirken, süneklik ve darbe sönüm kapasiteleri düşürdüğü gözlendi.

Anahtar Kelimeler

• Aşırı plastik deformasyon
• Darbe sönüm kapasitesi
• Cu-Co-Be-Ni alaşımı

Proje Numarası

Herhangi bir proje desteği alınmamıştır.

Investigation of the effect of multi-directional forging and aging processes on the impact behavior of Cu-Co-Be-Ni alloy

Öz

In this study, different combinations of mechanical and thermal processes, such as solution treatment, multi-directional forging (MDF), and aging treatment, were applied to the Cu-Co-Be-Ni alloy. The effects of the applied processes on microstructure, mechanical properties, and fracture toughness of samples were systematically investigated. The obtained results demonstrated that the process steps applied separately or in combination were quite effective on both the mechanical and microstructural properties of the alloy. The highest hardness and strength values were obtained after the combination of solutioned, MDF and aging processes, respectively, while the fracture toughness was found to be lowest in this structure. In summary, it was observed that while the mechanical properties of the alloy were improved due to grain refinement and increasing dislocation density in the structure due to the effect of MDF and precipitation formation after aging, the ductility and impact damping capacities decreased.

Anahtar Kelimeler

• Severe plastic deformation
• Impact toughness
• Cu-Co-Be-Ni alloy

Proje Numarası

Herhangi bir proje desteği alınmamıştır.

Kaynakça

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