A comparison of the sintering characteristics of ball-milled and attritor-milled W-Ni-Fe heavy alloy

M. L. Öveçoǧlu*, B. Özkal, C. Suryanarayana

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

28 Citations (Scopus)

Abstract

Blended elemental W-7 wt. %Ni-3 wt. %Fe powders were mechanically alloyed in a planetary ball mill and a heavy duty attritor. The structural and morphological characteristics of the as-milled powders were characterized by x-ray diffraction and electron microscopy techniques. A ternary solid solution of Fe and Ni in W formed in both the cases; the amount of Ni and Fe dissolved is higher in the attritor-milled powder than in the ball-milled powder. Morphologically, the W-rich particles in the attritor-milled powders were spheroidal, smaller in size, and showed a narrower size distribution than in the ball-milled condition. These differences led to increased density in the attritor-milled powder compact and significant differences in chemical composition of the matrix region and W-rich grains. Transmission electron microscopy investigations of the matrix region in the compacts revealed the presence of Fe2W precipitates uniformly distributed in an Ni(Fe, W) matrix.

Original languageEnglish
Pages (from-to)1673-1682
Number of pages10
JournalJournal of Materials Research
Volume11
Issue number7
DOIs
Publication statusPublished - Jul 1996

Funding

We gratefully acknowledge the financial support to the program by the Technical and Scientific Research Council of Turkey (TÜBITAK). The first two authors would like to thank Professor Dr. Ali Fuat C¸ akir and Professor Dr. Erman Tulgar, the Dean and the Department chairman, respectively, for their efforts in establishing the Powder Metallurgy Laboratory as a result of the TÜBITAK project in the Department of Metallurgical Engineering of the Faculty of Chemistry-Metallurgy at the Technical University of Istanbul. We also wish to thank Professor Dr. F. H. (Sam) Froes, Director of the Institute for Materials and Advanced Processes at the University of Idaho for providing the transmission electron microscopy facilities. The final phase of this research was completed during the sabbatical leave of MLÖat the University of Idaho as a Fulbright research award grantee coordinated by the Council for International Exchange for Scholars. The authors would also like to thank Professor Dr. W. D. Nix of Stanford University for his critical review of the manuscript, and his constructive and useful suggestions.

FundersFunder number
Consejo Nacional de Investigaciones Científicas y Técnicas
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

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