INVESTIGATION OF DEFORMATION TEMPERATURES AND STRAIN RATE EFFECTS' ON THE MECHANICAL PROPERTIES OF Al 99.0

The effects of deformation temperature and strain rate to the mechanical properties of Aluminum (Al 99.0) were investigated by tensile experiment at different deformation temperatures and strain rate. At the end of investigation; it was determined that, with increasing deformation temperature, yield and tensile strenghts of the material decrease, strain rate and decrease of area increase, when plastic deformation exponent (n) decreases, strain rate accuracy exponent (m) increases. At a fixed temperature an increase in deformation speed increased all mechanical properties.

DEFORMASYON SICAKLIÐININ VE DEFORMASYON HIZININ Al 99.0’UN MEKANÝK ÖZELLÝKLERÝNE ETKÝSÝNÝN ÝNCELENMESÝ

Alüminyum (Al 99.0), çeþitli deformasyon sýcaklýðý ve deformasyon hýzlarýnda çekme deneyine tabi tutularak, deformasyon hýzý ve deformasyon sýcaklýðýnýn bu malzemenin mekanik özelliklerine etkisi incelenmiþtir. Ýnceleme sonucunda; artan deformasyon sýcaklýðý ile malzemenin akma ve çekme mukavemeti deðerlerinin azaldýðý, birim þekil deðiþtirme ve kopma büzülmesinin arttýðý, plastik deformasyon üssü (n)'in azalýrken deformasyon hýzý duyarlýlýðý üssü (m)'in arttýðý tesbit edilmiþtir. Sabit bir sýcaklýkta ise deformasyon hýzýnýn artmasý, tüm mekanik özellik deðerlerini arttýrmýþtýr.