Muestras de las aleaciones 6082 A1 y 7075 A1 se sometieron a un tratamiento térmico en horno de inducción de ultraalta frecuencia (UHFIHS) a 580 ºC durante 1 min y suministro de agua al final del proceso. El envejecimiento artificial se llevó a cabo a 190 °C durante 2, 4, 6 y 8 min. En ambas aplicacio-nes, el calentamiento se llevó a cabo utilizando un sistema de inducción con una frecuencia de 900 kHz y una potencia de 2,8 kW. Para estas series y diseños de aluminio, se calcularon los costos del tratamiento térmico. Adicionalmente, se compararon los valores de dureza de las muestras de 6082 A1 y 7075 A1 envejecidas artificialmente a 190 °C durante 10 h con los métodos convencionales 540 °C durante 5 h. Los resultados de dureza de la muestra 6082 Al obtenidos en 10 h mediante métodos convencionales, tardaron sólo 8 min mediante el envejecimiento artificial con el sistema de inducción.

Teknolojinin hızla gelişmesi ile birlikte, imalat, havacılık ve otomotiv sektörlerinde yaygın olarak kullanılan standart malzemeler yerini yeni nesil yüksek mukavemete ve hafifliğe sahip malzemelere bırakmaktadır. Özellikle, Tungsten karbür (WC) ve Grafenin sahip olduğu yüksek termal ve elektriksel özellikler, yüksek elastisite modülü, yüksek mukavemet gibi üstün özellikleri sayesinde alüminyum matrisli kompozit malzeme üretiminde büyük etki ve avantajlara sahiptir. Bu çalışmada, WC ve Grafen takviyelerinin alüminyum matrisli kompozit malzemelerin mekanik özelliklerine etkisi ile ilgili çalışmalar incelenerek sunulmuştur. Alüminyum matrisli kompozitlerin mekanik özelliklerinin iyileştirilmesinde %20'ye kadar WC ve %0.7'ye kadar grafen katkısının etkili olduğu raporlanmıştır. Grafen ilavesinin %0.5’ten fazla arttırılması topaklanmalara, WC ilavesinin %30’dan fazla arttırılması ise gözenekliğin artmasına ve mekanik özelliklerin azalmasına neden olmaktadır.

Aluminum-based composite materials are frequently preferred in many new-generation engineering applications due to their high strength, wear and corrosion resistance, improvement of mechanical properties, machinability, and low density. Mechanical alloying has an important place in the production of composites with high properties in powder metallurgy, which is one of the composite material production methods. In this study, the deformation of AA7075 powder was investigated with a three-dimensional ball mill designed and produced for use in mechanical alloying processes. Three different rotational speeds (150, 200, 250 RPM), three different b all to powder ratios (1:5, 1:10, 1:20) and three different milling times (30, 60, 90 min) in the milling processes. Deformations in the powders were evaluated by particle size analysis and powder structure examination. The obtained results were analyzed with analysis of variance, regression method, three-dimensional graphics, optical microscope and Scanning Electron Microscope images. When the results are examined, the maximum deformation and powder size among the selected experimental parameters were realized at 150 RPM rotational speed, 1:20 ball to powder ratio, and 90 min.

Hybrid composites have two or more reinforcement ratios, and they are among the preferred materials in many engineering applications due to their unique properties, such as lightness, low cost, easy applicability, and high strength. This study investigated the effect of sintering aluminum matrix graphene (0.1% and 0.5%) and SiC (10% and 20%) reinforced hybrid composite with an ultra-high frequency induction heating system on mechanical and physical properties. Powder mixtures were prepared using a three-dimensional mixing system were prepared according to the experimental design created by the Taguchi method at three different temperatures (580, 600, and 620 ℃), three different pressures (80, 90, and 100 bar), and three different sintering times (5, 7 and 10 min). It was produced, and its hardness, density, and microstructure were examined. ANOVA analysis was performed on the results obtained and a mathematical model was created. As a result of the experiments, the highest hardness value of the 0.1% graphene and 10% SiC reinforced hybrid composite was 90.4 HB at 100 bar pressure, 10 min sintering time and 580 ℃ sintering temperature, and the highest hardness value of the 0.5% graphene and 20% SiC reinforced composite was 100 bar. The pressure was obtained as 103.5 HB at 5 min sintering time and 600 ℃ sintering temperature.