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Microstructure and mechanical properties of PM Fe CuAl2O3 alloys

ERTUĞRUL ÇELIK1, SERKAN ISLAK2,* , DURMUŞ KIR3, CUMALI ILKILIÇ4

Affiliation

  1. Tunceli University, Faculty of Engineering, Department of Mechanical Engineering, Tunceli, Turkey
  2. Kastamonu University, Faculty of Engineering and Architecture, Department of Materials Science and Nanotechnology Engineering, Kastamonu, Turkey
  3. Kocaeli University, Hereke Vocational High School, Kocaeli, Turkey
  4. Firat University, Technology Faculty, Automotive Engineering Department, Elazig, Turkey

Abstract

The purpose of this study was to investigate the effect of Cu addition on the microstructure and mechanical properties of PM Fe-Cu-Al2O3 alloys produced using hot-pressing method. Copper powder was added to iron powder at 5 wt.%, 10 wt.% and 15 wt.% rates. Production of Fe-Cu-Al2O3 alloys was carried out under pressure of 35 MPa, at 750, 800 and 850 ˚C, and for a sintering time of 4 minutes. Microstructure phase composition, relative density, hardness, and transverse rupture strength of the alloys were investigated. Phase composition and microstructure of the alloys were characterised by optical microscopy, X-ray diffraction and scanning electron microscope (SEM-EDS) techniques. The transverse rupture strength (TRS) of the samples was assessed by means of a three-point bending test. Hardness of Fe-Cu-Al2O3 alloys changed between 57 HB and 110 HB depending on the amount of Cu and sintering temperature. Results show that the TRS of the alloys decreased together with the increase in the amount of copper, while it increased with increasing sintering temperature..

Keywords

PM, Fe-Cu-Al2O3 alloy, Sintering, Microstructure, TRS.

Citation

ERTUĞRUL ÇELIK, SERKAN ISLAK, DURMUŞ KIR, CUMALI ILKILIÇ, Microstructure and mechanical properties of PM Fe CuAl2O3 alloys, Optoelectronics and Advanced Materials - Rapid Communications, 7, 5-6, May-June 2013, pp.406-410 (2013).

Submitted at: Feb. 28, 2013

Accepted at: June 12, 2013