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Bu çalışmada, saf haldeki Al, Zn, Cu ve Mg tozlarından mekanik öğütme ile iki farklı kompozisyonda malzeme üretilmiştir. Daha sonra tozlar 800 MPa basınç altında preslenmiş ve presleme sonrası 600ºC’de atmosfer kontrollü fırında (yüksek saflıktaki argon) sinterleme işlemine tabi tutulmuştur. Sinterlenen numunelere 480ºC’de çözündürme işlemi uygulandıktan sonra, hızlı su verme işlemi gerçekleştirilmiştir. Su verilen numunelere ise 120 ºC yaşlandırma sıcaklığında, 3’er saat arayla, toplamda 12 saat yaşlandırma işlemi uygulanmıştır. Numunelerde yaşlanma ve sinterlemenin etkilerini incelemek için FESEM, Optik Mikroskop, Element Dağılım Spektrometresi, Haritalama (MAP), sertlikteki etkileri incelemek için mikrosertlik ölçümleri gerçekleştirilmiştir. İncelemeler sonucunda yaşlanma sonrası sertlikte artış meydana gelmiş ve sertlikteki bu artışın mikroyapıda içten oluşumlu şekilde meydana gelen çökeltilerin sayesinde olduğu gözlemlenmiştir.
In this study, materials in two different compositions were produced with mechanical polishing from pure Al, Zn, Cu and Mg powder. The powder was subsequently pressed under a pressure of 800 MPa and subsequently pressed at 600oC in the atmospheric-controlled oven (high purity argon). After the solution process was applied to the synthesized samples at 480oC, the rapid water supply process was carried out. For the water given samples; at an aging temperature of 120 oC, between 3 and 12 hours, a total of 12 hours of aging process was applied. For the study of the effects of aging and synthesis in samples, microsecurity measurements have been carried out to study the effects of FESEM, Optical Microscope, Element Distribution Spectrometry, Maping (MAP), hardness. The results of the reviews have seen an increase in hardness after aging and this increase in hardness has been observed due to the breakdowns that occur in the microbuilding in an internal form.
In this study, two different compositions contain pure Al, Zn, Cu and Mg were produced by powder metallurgy. The powders were pressed under 800 MPa and sintered in purity argon atmosphere at 600ºC after pressing process. Solution heat treatment were applied to sintered samples at 480ºC and then rapid quenching was performed. For quenched samples; Ageing process was carried out at 120ºC for 3h periods totally 12 hours. As a result, the ageing process leads to increased hardness due to the homogeneously dispersed secondary precipitates that form internally in the microstructure.
Field : Mühendislik
Journal Type : Ulusal
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