ECAP Tekniği ile Tane İnceltme Yoluyla Al6063 Alaşımının Mikro Yapı Evriminin ve Tribolojik Özelliklerinin Geliştirilmesi

Öz

Mevcut çalışmada, Al6063 alaşımının mikro yapısal ve tribolojik özelliklerini oda sıcaklığında farklı geçişlerle (2, 4 ve 8) ve BC rotası seçilerek ECAP tekniği kullanılarak iyileştirerek malzemenin havacılık, uzay ve otomotiv endüstrilerinde uygulanabilirliğini artırmak amaçlanmıştır. Mikro yapısal karakterizasyon işlemlerinde tüm numunelere XRD, SEM, EDS/Mapping, 3D Profilometer, TEM ve TEM/MapViewer yöntemleri uygulanmıştır. Mekanik ve tribolojik özellikleri değerlendirmek için mikro sertlik ve kuru kayma aşınma testleri yapılmıştır. Geçiş sayısının 8 olmasıyla eş eksenli alt mikron/nano tanelerin sertliğinin 119HV'ye çıktığı ve en iyi tribolojik özelliklere sahip olduğu (CoF: 0,398 ve Ra: 0,620) belirlenmiştir.

Anahtar Kelimeler

• ECAP
• Al6063
• TEM
• Tribolojik Özellikler

Enhancement of Microstructure Evolution and Tribological Properties of Al6063 Alloy Through Grain Refinement via ECAP Technique

Abstract

Present study aimed to increase the applicability of the material in the aviation, aerospace, and automotive industries by improving the microstructural and tribological properties of Al6063 alloy using the ECAP technique at room temperature with different passes (2, 4 and 8) and by selecting the BC route. XRD, SEM, EDS/Mapping, 3D Profilometer, TEM and TEM/MapViewer methods were performed on all samples in the microstructural characterization processes. Microhardness and dry sliding wear tests were conducted to evaluate the mechanical and tribological properties. It was determined that with the number of passes being 8, the hardness of the equiaxed sub-micron/nano grains increased to 119HV and had the best tribological properties (CoF: 0.398 and Ra: 0.620).

Keywords

• ECAP
• Al6063
• TEM
• Tribological Properties

Kaynakça

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