TY  - JOUR
TT  - Eş Kanallı Açısal Presleme ve Toz MetalurjisiYöntemiyle İşlenmiş Elementel TozlardanYaşlandırılabilir Al-%4Cu Alaşımların ÜretimiÜzerine Bir Çalışma
AU  - Varel, Gözde
AU  - Güral, Ahmet
PY  - 2016
DA  - September
JF  - Politeknik Dergisi
PB  - Gazi University
WT  - DergiPark
SN  - 2147-9429
SP  - 333
EP  - 341
VL  - 19
IS  - 3
KW  - Al alaşımı
KW  - yaşlandırma
KW  - aşırı plastik deformasyon
KW  - EKAP
N2  - Recently, severe plastic deformation (SPD) applications are getting more and more important. Especially by equal channel angular pressing (ECAP), the mechanical properties of alloys are increased. In addition that by shear planes which are activated with ECAP, the grain refinement in nano scales is obtained and it also affects and enhances even chemical properties of the materials. In this research study Al-4%(wt.)Cu powders were prepeared by pre-mixing. These pre-mixed powders were used to produce ingot materials by two different methods: ECAP and classical powder metallurgy method. Materials were sintered at 600oC for 2 hours and solution treated for 4 hours at 550oC then quenched to room temperature. Then materials were aged between particular time periods for 20 hours at 190oC. After solution treatment ECAPed samples had higher densification rate than the others. The micro-hardness measurements of all samples did not contain any difference untill ageing treatment. The dislocation density produced by SPD of the ECAPed samples, affected positively to micro-hardness. In micro-structure analysis Al/Cu intermetallic components are seen at ECAPed samples. Ageing plot was obtained for all samples and they were aged between 10-15 hours. The highest micro-hardness according to ageing times were 101,3 Hv which belongs to ECAPed sample
UR  - https://dergipark.org.tr/en/pub/politeknik/issue//368114
L1  - https://dergipark.org.tr/en/download/article-file/385811
ER  -