Microstructural characterization of equal-channel angular-pressed as powder Al-5% Ni alloy


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Demir U., GÜRAL A. , Ozturk M. K.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.32, ss.685-692, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 32 Konu: 3
  • Basım Tarihi: 2017
  • Doi Numarası: 10.17341/gazimmfd.337615
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Sayfa Sayıları: ss.685-692

Özet

The aim of this study was to consolidate of powders mixed Al-Ni through equal channel angular pressing (ECAP). Pure Al and 5 % (in wt.) Ni powders were exposed to ECAP with 5-15 passes procedure at 200 degrees C. With the increasing ECAP passes, Ni particles distributed in the Al matrix homogeneously and the solubility of Al in the Ni particles increased relatively. However, it was seen that Ni solubility in the Al matrix wasn't sufficient. The average grain size reduced with the increasing pass numbers of the ECAP process. While grain refinement started forming at the edge of initial large Al powder (inter-particles of Al) after applying 5-pass ECAP, finer and elongated grains were obtained after the 15-pass ECAP process. Average densities and HV0,5 micro hardness of the specimens were found as 2,7 g.cm-3 and 61 respectively. In these conditions of ECAP, Al-Ni intermetallic phases wasn't distinct formed.