Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods

Fatih Şenaslan; Murat Aydın

doi:10.17714/gumusfenbil.1005896

EN TR

Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods

Öz

The ternary Zn-27Al-1Cu alloy is produced from raw materials by the gravity casting method. The produced alloy was subjected to aging after solutionizing and quenching. The effect of ageing at different periods on the microstructure and damping behaviour of the alloy was investigated. The microstructural investigations revealed that the microstructure of the alloy in the as-cast state consisted of aluminium(Al)-rich α dendrites surrounded by eutectoid β phase, and zinc(Zn)-rich η phase and copper(Cu)-rich ε phase. The heat treatment eliminated the dendritic microstructure of the casting alloy and transformed it into a coarse-grained (β-matrix) stable form containing Zn-rich and Cu-rich precipitates. The microstructural changes after aging process were directly affected the mechanical properties of the alloy. The hardness and tensile strength increased with increasing ageing time up to 2.5 hours, but the percent elongation decreased. When the aging time reached 5 hours, hardness and tensile strength decreased while percent elongation increased significantly. The impact energy, namely toughness, increased in the early stage of aging, reduced sharply with increasing aging time and remained stable with a small increase in the prolonged stage of aging. The highest impact energy was attained from the aged alloy for 0.5 hours. The variation in damping energy was dependent on the changes in microstructural and mechanical properties caused by different aging periods. The prolonged aging process transformed the fracture characteristic of the as-cast alloy from relatively brittle to ductile fracture.

Anahtar Kelimeler

Aging, Damping behaviour, Microstructure, Precipitation hardening, Zn–Al alloys

Zn–27Al–1Cu alaşımının farklı yaşlandırma periyotlarında mikroyapısal değişiminin ve darbe davranışının incelenmesi

Öz

Üçlü Zn–27Al–1Cu alaşımı, hammaddelerden kokil kalıba döküm yöntemiyle üretildi. Üretilen alaşım, çözündürme ve su verme işlemlerinden sonra yaşlandırmaya tabi tutuldu. Farklı periyotlarda yaşlandırmanın alaşımın mikroyapısı ve darbe davranışı üzerindeki etkisi incelendi. Mikroyapısal incelemeler, döküm halindeki alaşımın mikroyapısının alüminyumca (Al) zengin α dendritleri ve onları çevreleyen ötektoid β fazı, çinkoca (Zn) zengin η fazı ve bakırca (Cu) zengin ε fazından oluştuğunu ortaya çıkarmıştır. Isıl işlem döküm alaşımının dendritik mikroyapısını ortadan kaldırdı ve alaşımın mikroyapısını Zn ve Cu bakımından zengin çökeltiler içeren iri taneli (β-matrisli) kararlı bir forma dönüştürdü. Yaşlandırma işlemi sonrası oluşan mikroyapısal değişimler, alaşımın mekanik özelliklerini doğrudan etkilemiştir. Yaşlandırma süresinin 2,5 saate kadar artmasıyla sertlik ve çekme dayanımı artmış, ancak yüzde uzama azalmıştır. Yaşlandırma süresi 5 saate ulaştığında sertlik ve çekme dayanımı azalırken, yüzde uzama önemli ölçüde artmıştır. Darbe enerjisi, diğer bir ifade ile tokluk yaşlanmanın erken evresinde arttı, yaşlanma süresinin artmasıyla keskin bir şekilde azaldı ve uzun süreli yaşlandırma durumunda az bir artışla sabit kaldı. En yüksek darbe enerjisi 0,5 saat boyunca yaşlandırılmış alaşımdan elde edildi. Darbe enerjisindeki değişim, farklı periyotlarda yaşlandırma işleminden kaynaklanan mikroyapısal ve mekanik özelliklerdeki değişikliklere bağlıydı. Uzun süreli yaşlandırma işlemi, döküm durumundaki alaşımın kırılma karakteristiğini nispeten gevrek kırılmadan sünek kırılmaya dönüştürdü.

Anahtar Kelimeler

Yaşlandırma, Darbe davranışı, Mikroyapı, Çökelme sertleşmesi, Zn-Al alaşım

Kaynakça

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Ayrıntılar

Birincil Dil

İngilizce

Konular

Mühendislik

Bölüm

Araştırma Makalesi

Yazarlar

Fatih Şenaslan ^*
0000-0003-0498-6332
Türkiye

Murat Aydın
0000-0002-8998-1620
Türkiye

Yayımlanma Tarihi

15 Nisan 2022

Gönderilme Tarihi

7 Ekim 2021

Kabul Tarihi

28 Şubat 2022

Yayımlandığı Sayı

Yıl 2022 Cilt: 12 Sayı: 2

DOI

https://doi.org/10.17714/gumusfenbil.1005896

IZ

https://izlik.org/JA48BN25YA

APA

Şenaslan, F., & Aydın, M. (2022). Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods. Gümüşhane Üniversitesi Fen Bilimleri Dergisi, 12(2), 636-648. https://doi.org/10.17714/gumusfenbil.1005896

AMA

1.Şenaslan F, Aydın M. Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods. Gümüşhane Üniversitesi Fen Bilimleri Dergisi. 2022;12(2):636-648. doi:10.17714/gumusfenbil.1005896

Chicago

Şenaslan, Fatih, ve Murat Aydın. 2022. “Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods”. Gümüşhane Üniversitesi Fen Bilimleri Dergisi 12 (2): 636-48. https://doi.org/10.17714/gumusfenbil.1005896.

EndNote

Şenaslan F, Aydın M (01 Nisan 2022) Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods. Gümüşhane Üniversitesi Fen Bilimleri Dergisi 12 2 636–648.

IEEE

[1]F. Şenaslan ve M. Aydın, “Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods”, Gümüşhane Üniversitesi Fen Bilimleri Dergisi, c. 12, sy 2, ss. 636–648, Nis. 2022, doi: 10.17714/gumusfenbil.1005896.

ISNAD

Şenaslan, Fatih - Aydın, Murat. “Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods”. Gümüşhane Üniversitesi Fen Bilimleri Dergisi 12/2 (01 Nisan 2022): 636-648. https://doi.org/10.17714/gumusfenbil.1005896.

JAMA

1.Şenaslan F, Aydın M. Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods. Gümüşhane Üniversitesi Fen Bilimleri Dergisi. 2022;12:636–648.

MLA

Şenaslan, Fatih, ve Murat Aydın. “Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods”. Gümüşhane Üniversitesi Fen Bilimleri Dergisi, c. 12, sy 2, Nisan 2022, ss. 636-48, doi:10.17714/gumusfenbil.1005896.

Vancouver

1.Fatih Şenaslan, Murat Aydın. Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods. Gümüşhane Üniversitesi Fen Bilimleri Dergisi. 01 Nisan 2022;12(2):636-48. doi:10.17714/gumusfenbil.1005896

e-ISSN: 2146-538X Yayın Modeli: Sürekli Yayın Atıf Dizinleri: TR Dizin , SCOPUS

Investigation of microstructural change and damping behaviour of Zn–27Al–1Cu alloy in different aging periods

Öz

Anahtar Kelimeler

Zn–27Al–1Cu alaşımının farklı yaşlandırma periyotlarında mikroyapısal değişiminin ve darbe davranışının incelenmesi

Öz

Anahtar Kelimeler

Kaynakça

Ayrıntılar

Birincil Dil

Konular

Bölüm

Yazarlar

Yayımlanma Tarihi

Gönderilme Tarihi

Kabul Tarihi

Yayımlandığı Sayı

DOI

IZ

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