4 results listed
In this experimental study, the tribological performance of 30wt.% short carbon fiber reinforced poly-ether-ketone
(PEEK+30%CF) high performance thermoplastic composite against a stainless steel (SS) and a high performance
thermoplastic polymer material such as 40wt.% glass fiber reinforced poly-phenylene-sulphite (PPS+40%GF)
composite materials under dry sliding condition were evaluated. Tribological tests were carried out on a pin-disc
wear test rig and under the sliding speed of 0.5 m/s and the applied pressures of 0.707, 1.41 and 2.12MPa
conditions. The results show that the friction coefficient for carbon fiber reinforced PEEK composite against
PPS+40%GF polymer composite and stainless steel materials increases slightly with the increment of applied
pressure values. Furthermore, the specific wear rate for carbon fiber reinforced PEEK composite against
PPS+40%GF composite increases but it decreases against stainless steel with the increment of applied pressure
values. Finally, the wear rates for carbon fiber reinforced PEEK polymer composite against PPS+40%GF
composite and stainless steel materials under dry sliding conditions are in the order of 10-14 and 10-15 m2/N,
respectively. The results suggested that PEEK+30%CF-stainless steel pair is the best material pair for use in
friction and wear applications in the study.
International Symposium on Light Alloys and Composite Materials
UHAKS
İrfan Akgül
Hüseyin Ünal
In this experimental study, the tribological behaviour of polyamide-6 (PA-6) polymer, 10wt.%graphite filled
polyamide-6 (PA-6+10%G) composite, polyamide-6 with wax (PA-6+6%w) and both 10wt.% graphite and
6wt.%wax filled polyamide-6 (PA-6+10%G+6%W) composites against steel under dry sliding condition were
studied. Pin-on-disc wear test rig was used for the tribological tests. Friction and wear tests were studied at room
temperature. Tribological tests were done at the sliding speeds of 0.4, 0.8 and 1.6m/s and under the load of 100N.
As a disc material, AISI 316L stainless steel were used. The results show that the specific wear rates for all polymer
and polymer composites used against steel increases slightly with the increment of sliding speed values. In
addition, the coefficient of friction for polyamide-6 with wax polymer and graphite/wax filled polyamide-6
composite increase slightly, but it is decreases slightly with the increment of sliding speed for graphite filled
polyamide 6 composite. Finally, the specific wear rates for PA-6 polymer, PA-6+10%G composite, PA-6+6%W
and PA-6+10%G+6%W composite against steel under dry sliding conditions are in the order of 10-14, 10-14, 10-15
and 10-15 m2/N, respectively. The results suggested that it is more convenient to use PA-6+10%G+6%W composite
against steel for tribological applications in the study.
International Symposium on Light Alloys and Composite Materials
UHAKS
İrfan Akgül
Hüseyin Ünal
In this experimental study, the tribological performance of glass fiber reinforced poly-ether-ketone (PEEK)
composite against long glass fiber reinforced unsaturated polyester composite and steel under dry sliding condition
were evaluated. Wear tests were carried out on a pin-on-disc arrangement and under 0.707, 1.41 and 2.12 MPa
applied pressures and 0.5 m/s sliding speed condition. As a disc material, AISI 316L stainless steel and 20wt.%
glass
fiber
reinforced
and
15%
calcium
carbonate
(UPET+20%GF+15%CaCO3) composite were used. The results present that the coefficient of friction and wear
rates for 30wt.% glass fiber reinforced PEEK composite (PEEK+30%GF) against long glass fiber reinforced
unsaturated polyester composite and stainless-steel increases slightly with the increase in applied pressure values.
Finally, the wear rates for PEEK polymer composite against long glass fiber reinforced unsaturated polyester
composite and stainless steel under dry sliding conditions are in the order of 10-14 and 10-15 m2/N, respectively.
The results suggested that it is more convenient to use glass fiber reinforced poly-ether-ketone composite against
stainless steel for tribological applications.
International Symposium on Light Alloys and Composite Materials
UHAKS
İrfan Akgül
Hüseyin Ünal
Çok boyutlu yazdırma teknolojisi gün geçtikçe artan talep ve teknolojideki gelişim üzerine bireysel ve
kurumsal kullanımda daha popüler hale gelmektedir. Üretilecek ürünün karmaşıklığının bir önemi
kalmadan tek parça halinde üretilme imkanı ve montaj ekipmanlarına gerek kalmadan bu işi
yapabilmesi çok boyutlu yazıcıların bir diğer tercih edilme sebebi olmaktadır. Bu teknoloji materyal
çeşitliliğinin artması ve daha ucuz erişim imkanı ile potansiyel kullanıcıları tarafından her geçen gün
daha ilgi çekici hale gelmektedir. Bu araştırma çalışmasında FDM (Kaynamış birikim modelleme),
Multijet ve Colourjet teknikleriyle üretimi yapılmış numuneler karşılaştırılarak imalat sektöründeki
uygunluklarının belirlenmesi hedeflenmiştir. Çok boyutlu yazıcılar ile yazdırma parametrelerindeki
değişikliklerin üretilen numunelere uygulanan destek kayıpları ve kapalı geçme deneyleri gibi
kıyaslamalar uygulamaların sonuçlarına göre açıklanmıştır.
Multidimensional printing technology is becoming more and more popular in individual and
institutional use on the ever-increasing demand and development of technology. The complexity of the
product is not an important detail to be produced in one piece without the need for assembly
equipment and the ability to do this job is another reason for multidimensional printers. This
technology is becoming more and more interesting by potential users with increased material diversity
and cheaper access. In this research, it is aimed to determine the manufacturing suitability of the y
FDM, Multijet and Colourjet 3D printing technologies. Comparisons such as changes in printing
parameters with multidimensional printers, support losses applied to the produced samples and closed-
pass experiments are explained according to the results of the applications.
International Congress on 3D Printing (Additive Manufacturing) Technologies and Digital Industry
3D-PTC2019
Ufuk Çifci
Arif Özkan
İrfan Akgül