TY  - JOUR
T1  - Titanyum ile tane inceltmenin Al-25Zn alaşımının mikroyapı, mekanik ve korozyon özelliklerine etkisinin incelenmesi
TT  - Effect of grain refinement with titanium on the microstructure, mechanical and corrosion properties of Al-25Zn alloy
AU  - Hekimoğlu, Ali Paşa
AU  - Çalış, Merve
PY  - 2019
DA  - October
Y2  - 2019
DO  - 10.17341/gazimmfd.464676
JF  - Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi
JO  - GUMMFD
PB  - Gazi Üniversitesi
WT  - DergiPark
SN  - 1300-1884
SP  - 311
EP  - 322
VL  - 35
IS  - 1
LA  - tr
AB  - Buçalışmada, bir adet ikili Al-25Zn alaşımı ve Al-25Zn-0,01Ti, Al-25Zn-0,03Ti,Al-25Zn-0,04Ti, Al-25Zn-0,05Ti, Al-25Zn-0,075Ti, Al-25Zn-0,1Ti, Al-25Zn-0,2Ti,Al-25Zn-0,4Ti, Al-25Zn-0,6Ti, Al-25Zn-0,8 ve Al-25Zn-1Ti olmak üzere 11 adetüçlü alüminyum-çinko-titanyum alaşımı kokil kalıba döküm yöntemiyle üretildi.Üretilen alaşımların içyapı, mekanik ve korozyon özellikleri incelendi. İçyapıincelemeleri elektron mikroskobu(SEM) ve X-ışını kırınım(XRD) çalışmalarıylagerçekleştirildi. Mekanik özellikler ise Brinell sertlik ölçüm yöntemi ve çekmedeneyi yardımıyla belirlendi. Korozyon deneyleri elektrokimyasal testdüzeneğinde ASTM G5 standardına uygun olarak gerçekleştirildi. Al-25Zn veAl-25Zn-Ti alaşımlarının içyapılarının ana matris olarak α ve η fazlarındanoluştuğu, titanyum oranının %0,01’i aşması durumunda içyapıda Al3Ti fazınınçökelmeye başladığı gözlendi. Ayrıca Al-25Zn-Ti alaşımlarındaki dendrit veyatanelerin boyutunun ikili alaşıma göre çok daha küçük olduğu görüldü. Al-25Znalaşımına %0,01 oranında yapılan titanyum katkısının sertlik, akma ve çekmemukavemeti değerlerini artırdığı bu orandan daha yüksek katkıların ise azalttığıgözlendi. Titanyum katkılarının korozyon özelliklerini olumsuz etkilediğigörüldü. Farklı oranlardaki titanyum katkıları nedeniyle Al-25Zn alaşımınınmekanik ve korozyon özelliklerinde meydana gelen değişimler alaşımların yapısalözelliklerine dayandırılarak açıklandı.
KW  - Al-25Zn-Ti alaşımları
KW  - Titanyum katkısı
KW  - Tane inceltme
KW  - Mekanik özellikler
KW  - Korozyon
N2  - In this study, one binary Al-25n alloys and eleventernary aluminum-zinc-titanium alloys, Al-25Zn-0.01Ti, Al-25Zn-0.03Ti,Al-25Zn-0.04Ti, Al-25Zn-0.05Ti, Al-25Zn-0.075Ti, Al-25Zn-0.1Ti, Al-25Zn-0.2Ti,Al-25Zn-0.4Ti, Al-25Zn-0.6Ti, Al-25Zn-0.8 and Al-25Zn-1Ti, were produced bypermanent mold casting method. Structural, mechanical, and corrosion propertiesof the tested alloys were investigated. Structural investigations were carriedout with scanning electron microscope (SEM) and X-ray diffraction (XRD)studies. Mechanical properties of the alloys were determined with the Brinellhardness and tensile tests. Corrosion tests were carried out withelectrochemical test setup in accordance with ASTM G5 standard. Al-25Zn andAl-25Zn-Ti alloys were composed of α and η phases as the main matrix, and itwas observed that Al3Ti phase began to precipitate in the microstructurewhen the titanium content exceeded 0.01%. In addition, the size of dendrites orgrains of the Al-25Zn-Ti alloys was found to be much smaller than that ofbinary alloy. The hardness, yield strength, and tensile strengthvalues of the Al-25Zn alloy significantly increased with the 0.01%Ti addition,but when Ti content exceeded 0.01%, these values decreased with increasingtitanium content. It was observed that titanium addition had a negative effecton the corrosion properties of the Al-25Zn alloy. The change on the mechanicaland corrosion properties of the Al-25Zn alloy due to the titanium addition indifferent ratios have been explained based on the structural properties of thealloys.
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UR  - https://doi.org/10.17341/gazimmfd.464676
L1  - https://dergipark.org.tr/tr/download/article-file/839685
ER  -