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Tungsten solution kinetics and amorphization of nickel in mechanically alloyed Ni-W alloysThe kinetics of solution of W, and the subsequent amorphization of Ni, in mechanically alloyed Ni-W alloys has been investigated. As W is a highly abrasive material in the energy intensive devices used for mechanical alloying, we studied the above reactions in different mills. One used hardened steel balls as the grinding media, and the other Al2O3. Abrasion is common to both mills, but Fe wear debris from the hardened steel enters into solution in the Ni rich phases whereas Al2O3 debris is present as small dispersoids. The kinetics of W solution and those of subsequent amorphization do not appear strongly affected by the Fe in solution or the Al2O3 dispersoid. Tungsten dissolves in crystalline Ni in amounts in excess of the equilibrium solubility during alloying. Amorphization of the Ni phase occurs if the W content in this phase exceeds ca. 28 at. pct.
Document ID
19930037309
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Aning, A. O.
(Morgan State Univ. Baltimore, MD, United States)
Wang, Z.
(NASA Headquarters Washington, DC United States)
Courtney, T. H.
(Virginia Univ. Charlottesville, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Acta Metallurgica et Materialia
Volume: 41
Issue: 1
ISSN: 0956-7151
Subject Category
Metallic Materials
Accession Number
93A21306
Distribution Limits
Public
Copyright
Other

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