Yazarlar
Yayınlar
- MakaleAçık Erişim2017Scopus SJRQ3The Effect of Porosity and Cu Rate on Microstructure and Mechanical Properties of Co Alternative Powder Metallurgy Compound
Çelik, Ertugrul; Aslan, Ali Kemal
Cu-Ni-MX1480 powder compound were prepared at six different alloy ratios and cold pressed with a pressure of 300 MPa. Then 12 samples were obtained by hot pressing at 700 degrees C with 20 MPa pressure and at 800 degrees C with 30 MPa pressure for 4 minutes in a vacuum atmosphere hot pressing machine. Porosity ratios of samples were calculated by the different between theoretical density and measured density of samples. Effect of porosity on microstructure and mechanical properties were investigated by performing SEM, XRD, hardness measurements and TRS tests. It was observed that as a result of increased hot pressing parameters and increased Cu ratio, porosity ratio was decreased and better mechanical properties achieved.
AtıfWoS15OpenAlex14
İncele - MakaleAçık Erişim2012Scopus SJRQ3Effect of the cBN Content and Sintering Temperature on the Transverse Rupture Strength and Hardness of cBN/Diamond Cutting Tools
Kir, Durmus; Islak, Serkan; Çelik, Halis; Çelik, Ertugrul
The aim of this work was to investigate the effect of cBN content and sintering temperature on the transverse rupture strength (TRS) of cBN/diamond cutting tools produced by hot pressing. The segments containing different cBN content were manufactured under 35 MPa pressure at 600, 650 and 700 degrees C with a 3 minutes sintering time. The TRS of segments were determined using three-point bending test. Microstructure and phase composition of fracture surface of segments were determined by scanning electron microscopy (SEM), and X-ray diffraction (XRD) analysis. The obtained results show that the TRS of the segments with cBN were higher than that of the segments with diamond.
AtıfWoS20OpenAlex16İncele - DergiSCIENCE OF SINTERING