TY  - JOUR
T1  - AZ91 Mg ALAŞIMLARINDA KOROZYON DAVRANIŞI-Fe TOLERANS SINIRI ARASINDAKİ İLİŞKİNİN ARAŞTIRILMASI
TT  - An Investigation of Relationship Between Corrosion Behaviour- Fe Tolerance Limit in AZ91 Mg Alloys
AU  - Candan, Şennur
AU  - Çim, Serdar
AU  - Emir, Seren
AU  - Candan, Ercan
PY  - 2019
DA  - September
Y2  - 2019
DO  - 10.36306/konjes.613896
JF  - Konya Journal of Engineering Sciences
JO  - KONJES
PB  - Konya Technical University
WT  - DergiPark
SN  - 2667-8055
SP  - 654
EP  - 662
VL  - 7
IS  - 3
LA  - tr
AB  - Bu çalışmada, aynı şartlarda üretilmiş (benzer katılaşma hızı ve benzerkimyasal bileşimde) farklı Fe içeriğine (% ağ. 0.025, 0.05, 0.1) sahip AZ91 Mg alaşımlarınınkorozyon davranışları-Fe tolerans limit değeri arasındaki ilişkideğerlendirilmiştir. Numunelerin mikro yapı analizleriTaramalı Elektron Mikroskobu (SEM) ve X Işını Difraktometre (XRD) kullanılarakyapılmıştır. Korozyon davranışları %3,5 NaCl çözeltisinde, ağırlık kaybıve potansiyodinamik polarizasyon test yöntemleri kullanılarak araştırılmıştır. Mikroyapıanalizlerinde, Fe içeriğinin artması ile yapıdaki “kısmen ayrışmış” veya “lamellerötektik” tipi β fazı morfolojilerinde artış eğiliminin daha fazla olduğugözlenmiştir. Sonuçlar, AZ91 alaşımı Fe tolerans limit değerinin ~%0.05 olduğunu bu değerden sonra korozyon kaybının eksponansiyel olarakarttığını göstermiştir.
KW  - AZ91 Mg alaşımı
KW  - Mikro yapı
KW  - Korozyon
N2  - In this study, relationshipbetween Corrosion Behaviour-Tolerance Limit of Fe content (0.025, 0.05, 0.1 wt.%) in AZ91 Mg alloys, cast under similar chemical composition and cooling rate,were investigated. The microstructures of Mg alloys were analysed by ScanningElectron Microscopy (SEM) and X Ray Diffractometry (XRD). The corrosionbehaviours were evaluated by immersion tests and electrochemical polarizationmeasurements in 3.5 wt. % NaCl solution. Microstructure analysis revealed thatthe increase of Fe content increased the “partially divorced” or “lamellaeutectic” type β phase morphologies in the microstructure. Results indicatedthat the limit content value of Fe in AZ91 alloys was ~0.05 wt. % above which thecorrosion loss had increased abruptly.
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UR  - https://doi.org/10.36306/konjes.613896
L1  - https://dergipark.org.tr/en/download/article-file/797906
ER  -