TOZ METALURJİSİ YÖNTEMİYLE ÜRETİLEN AA6061 ALAŞIMINDA İŞLEM KONTROL KATKISI VE SICAK/SOĞUK PRESLEMENİN KARŞILAŞTIRMALI ETKİSİ

Öz

Bu çalışmada, bilyalı öğütme işlemi ile öğütülen AA6061 alaşım tozlarının mikroyapı ve mekanik özelliklerine işlem kontrol katkısının ve üretim prosesinin (sıcak ve soğuk pres) etkisi incelenmiştir. Üretilen tozlar soğuk pres (650MPa basınç sonrasında 650 oC sinterleme) ve sıcak pres (600 oC sıcaklık altında 100 Mpa basınç) yöntemleriyle disk numuneler elde edilmiştir. Üretilen tozların mikroyapıları taramalı elektron mikroskobu (SEM) ile numunelerin mikroyapıları ise optik mikroskop ile incelenmiştir. Hem İKK’nın etkisinin hem de üretim prosesinin mekanik özellikler üzerine etkisini incelemek için yoğunluk ve Brinell sertlik ölçümleri kullanılmıştır. İKK ‘nın toz boyutunu azalttığı görünürken, İKK’lı sıcak pres ile üretilen numunenin yoğunluk ve sertlik değerlerinin yükselttiği görülmüştür.

Anahtar Kelimeler

• Bilyalı Öğütme
• Sıcak Pres
• Soğuk Pres
• İKK
• AA6061

Etik Beyan

Yapılan çalışmada araştırma ve yayın etiğine uyulmuştur.

COMPARATIVE EFFECTS OF PROCESS CONTROL AGENT AND HOT/COLD PRESSING ON AA6061 ALLOY PRODUCED BY POWDER METALLURGY

Öz

In this study, the effects of process control agent (PCA) addition and production method (hot and cold pressing) on the microstructural and mechanical properties of AA6061 alloy powders processed via ball milling were investigated. Disc-shaped samples were produced by cold pressing (650 MPa followed by sintering at 650 °C) and hot pressing (under 100 MPa pressure at 600 °C) of the milled powders. The morphology of the powders was examined using scanning electron microscopy (SEM), while the microstructure of the samples was characterized by optical microscopy. To evaluate the influence of both the PCA and the processing method on mechanical performance, density and Brinell hardness measurements were conducted. The use of PCA was found to reduce particle size, and the sample produced by hot pressing with PCA exhibited increased density and hardness values.

Anahtar Kelimeler

• AA6061
• Ball Milling
• Hot Press
• Cold Press
• PCA

Kaynakça

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