Sıcak Presleme Yöntemiyle Üretilmiş B4C Takviyeli AA 7xxx Matrisli Fonksiyonel Derecelendirilmiş Malzemelerin Çapraz Kırılma Dayanımının Belirlenmesi

Abstract

ÖZ Investigation of Transverse Rupture Strength of AA7xxx Matrix Functional GradedMaterials Reinforced B4C ABSTRACTIn this work, functional graded materials were produced by hot pressing with AA7075 alloy powders and B4C particles. B4C particles between 10% and 60% by weight were added to the AA 7075 matrix. Matrix materials and particles were mixed in a three dimensional mixer. The blend powders were pressed at varying temperatures (250, 350 and 450°C) and pressures (200, 300 and 400 MPa). Functionally graded materials with 5 different transition zones were produced after pressing. Macro hardness measurements were made to determine the hardness change of the transition zones. The produced specimens were cut using wire electrical discharge machining (WEDM) and transverse rupture strength test specimens were obtained in standard sizes. The maximum transverse rupture strength was reached at 450 o C samples.