WE43 Magnezyum Alaşımının Soğuk Sprey Kaplama Yöntemi ile Al/Zn/Al2O3 ve Zn/Al2O3 Kaplanması ve Aşınma Davranışlarının İncelenmesi

Year 2022, Volume: 25 Issue: 4, 1791 - 1798, 16.12.2022

Canser Gül Sevda Albayrak Nilay Çömez Hülya Durmuş

https://doi.org/10.2339/politeknik.1128114

Cited By: 1

Abstract

Mg alaşımları otomotiv, uçak, uzay ve haberleşme sektörlerinde düşük özgül ağırlıkları ve yüksek mukavemetli olması nedenleriyle tercih edilmektedir. WE serisi, Mg, Y, Nd, nadir toprak elementlerini içeren Mg alaşımları serisidir. Bu alaşım serisi için sürünme dayanımı iyi olsa da aşınma dayanımı gelişmeye açıktır. Bu çalışmada amaç, özgül ağırlıkları nedeni ile kullanım potansiyeli yüksek olan WE43 Mg alaşımlarının aşınma dayanımını arttırabilecek kaplamaların, endüstride de kolaylıkla uygulanabilecek bir yöntem kullanarak geliştirilmesidir. Bu amaçla soğuk sprey kaplama yöntemi kullanılarak aynı zamanda yüzeyleri fazlasıyla aktif olan magnezyum alaşımlarının oksitlenmeden kaplanması sağlanmış ve aşınma dayanımı geliştirilmiştir. Yüzeyleri ince kumlama işlemiyle pürüzlendiren WE43 Mg alaşımları soğuk sprey yöntemi kullanılarak Al/Zn/Al2O3 ve Zn/Al2O3 içerikli ve ticari isimleri sırasıyla DYMET K-20-11 ve DYMET K-00-11 olan tozlar kullanılarak 500ºC sıcaklıkta N2 koruyucu gaz atmosferi altında süpersonik hızlardaki tozlar için 6 g/dak. toz besleme hızıyla altlıklar üzerine püskürtülmüştür. Farklı içerikli tozlarla kaplanmış ve kaplanmamış numunelerin morfolojik analizleri SEM ve XRD yöntemleri ile incelenmiş, kaplama kalınlıkları kesitten alınan SEM görüntülerinden ölçülmüş, EDS analizleri ile elementlerin yüzde oranları tespit edilmiştir. Ayrıca aşınma performansının incelenmesi için ball-on disk aşınma testlerinden hacim kayıpları değerlendirilmiştir. Sonuç olarak, soğuk sprey kaplamalarla, kaplamasız duruma göre WE43 alaşımlarının aşınma kaybı yaklaşık %40 oranında azalmıştır. 

Keywords

WE43, magnezyum alaşımı, soğuk sprey kaplama, aşınma

Al/Zn/Al2O3 and Zn/Al2O3 Coatings by Cold Spray Coating Method of WE43 Magnesium Alloy and Investigation of Its Wear Behaviors

Abstract

Mg alloys are preferred in automotive, aircraft, aerospace and communication industries due to their low specific gravity and high strength. WE series is a series of Mg alloys containing Mg, Y, Nd, rare earth elements, and although the creep strength is good for this alloy series, the wear resistance is open to improvement. The aim of this study is to develop coatings that can increase the wear resistance of WE43 Mg alloys, which have a high potential for use due to their specific gravity, by using a method that can be easily applied in the industry. For this purpose, using the cold spray coating method, magnesium alloys, whose surfaces are highly active, are provided to be coated without oxidation and wear resistance is improved. In the study carried out, WE43 Mg alloys, which roughen the surfaces by fine sandblasting process, were used with cold spray method, using powders containing Al/Zn/Al2O3 and Zn/Al2O3 and trade names DYMET K-20-11 and DYMET K-00-11, respectively, using N2 shielding gas at 500ºC. 6 g/min for powders delivered to supersonic speeds under the atmosphere. The powder was sprayed onto the substrates using the feed rate. Morphological analysis of the coated and uncoated samples with different contents were examined by SEM, XRD methods, the coating thicknesses were measured with SEM images taken from the section, and the percentages of the elements were determined by EDS analysis. In addition, ball-on disc wear tests were performed to examine the wear performance and volume losses were evaluated. As a result, the wear loss of WE43 alloys was reduced by approximately 40% compared to the uncoated condition, thanks to the cold spray coatings.

Keywords

WE43, magnesium alloy, cold spray coating, wear

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