Kumlama Türü ve Besleme Hızının WE43 Mg Alaşımına Uygulanan Soğuk Sprey Kaplamanın Aşınma Davranışına Etkisi

Öz

Mg ve alaşımları, özellikle otomotiv, spor ve havacılık sektörlerinde artan talep gören, hafif yapısal metallerin bir grubudur. Ancak, Mg alaşımlarının ticari kullanımını sınırlayan en büyük sorun, zayıf korozyon ve aşınma dirençleridir. Bu çalışma, WE43 Mg alaşımının aşınma ve mekanik performansını artırmak amacıyla %48-52 Ni, %13-17 Zn ve %33-37 Al2O3 karışımı toz kullanılarak 500 oC’ de gerçekleştirilen soğuk sprey kaplama ile yüzey modifikasyonunu ve besleme hızı etkisini incelemektedir. Geleneksel termal sprey yöntemlerinin aksine, soğuk sprey erime, oksitlenme ve faz değişimlerini önleyerek daha yoğun kaplamalar oluşturur. WE43 alt tabakaları, iki farklı kumlama ortamı cam boncuklar ve S110 çelik bilyeler ile ön işlemden geçirilmiş ve 3, 6 ve 9 g/dk toz besleme hızlarında kaplanmıştır. XRD analizleri, düşük ısı girişi sayesinde Ni, Zn ve Al2O3’ün yapısal bütünlüğünün korunduğunu ve ara yüzeyde istenmeyen intermetalik faz oluşumunun engellendiğini göstermiştir. Aşınma testleri, cam bilye ile üretilen numunelerde Zn miktarının aşınma hacmini önemli ölçüde azalttığını (r ≈ −0.977), S110 çelik bilye ile kumlanan numunelerde ise temas açısındaki artışın aşınma direncini kritik düzeyde iyileştirdiğini (r ≈ −0.990) göstermektedir. Bu sonuçlar, uygun yüzey hazırlığı ve kaplama bileşiminin WE43 Mg alaşımının aşınma performansını artırabileceğini göstermektedir.

Anahtar Kelimeler

• Aşınma
• Kaplama
• Soğuk Sprey Kaplama
• WE43 Mg alaşımı

Destekleyen Kurum

TÜBİTAK

Proje Numarası

1919B012315528

Etik Beyan

Makale yazarları aralarında herhangi bir çıkar çatışması olmadığını beyan ederler.

Teşekkür

Bu çalışma, 1919B012315528 numaralı TÜBİTAK 2209-A Üniversite Öğrencileri Araştırma Projeleri Destekleme Programı kapsamındaki proje ile desteklenmeye hak kazanmıştır.

Effect of Blasting Type and Feed Rate on the Wear Behavior of WE43 Mg Alloy Coated by Cold Spray

Öz

Mg and its alloys are an essential group of lightweight structural metals, which are in increasing demand, especially in the automotive, sports, and aerospace sectors. However, the major drawback and the greatest challenge to Mg alloy commercial utilization is their poor corrosion and wear resistance. This study investigates the surface modification of WE43 Mg alloy via cold spray coating performed at 500 °C using a powder mixture of 48-52% Ni, 13-17% Zn, and 33-37% Al2O3, with a specific focus on the influence of feed rate to enhance wear resistance and mechanical performance. Unlike conventional thermal spraying, cold spraying avoids melting, oxidation, and phase changes, producing denser coatings. WE43 substrates were pre-treated with two blasting media glass shots and S110 steel shots and coated at powder feed rates of 3, 6, and 9 g/min. XRD analysis showed that the low heat input preserved the structural integrity of Ni, Zn, and Al2O3, preventing undesirable intermetallic formation at the interface. Uniform Zn particles in the mixture promoted void-free deposition and higher coating efficiency. Wear tests demonstrate that the Zn content significantlyreduces the wear volume in specimens produced with glass beads (r ≈ -0,977), whereas for specimens blasted with S110 steel shot, the increase in contact angle critically improves wear resistance (-0,990). These results show that proper surface preparation and coating composition can enhance the wear performance of WE43 Mg alloy.

Anahtar Kelimeler

• Wear
• Coating
• Cold Spray Coating
• WE43 Mg alloy

Destekleyen Kurum

TÜBİTAK

Proje Numarası

1919B012315528

Etik Beyan

The authors declare that they have no conflict of interest.

Teşekkür

This study was deemed eligible for support within the scope of the TÜBİTAK 2209-A Research Projects Support Program for Undergraduate Students under project number 1919B012315528.

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