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Mechanical processing of iron powders in reactive and nonreactive gas atmospheres.

Authors
Rawers-JC; Doan-RC
Source
Metall Mater Trans, A Phys Metall Mater Sci 1994 Feb; 25A:381-388
NIOSHTIC No.
10005049
Abstract
Mechanical alloying, usually the blending together of elemental metal powders, has been used successfully to produce nonequilibrium microstructures. In this Bureau of Mines study, the effect of mechanical processing on powders in reactive (nitrogen) and nonreactive (argon) gas atmospheres was investigated and compared to results for similar powders that had nitrogen diffused into them. Infusion of nitrogen into powder by mechanical processing resulted in a nitrogen concentration exceeding 1 wt pct, 20 times the as-cast solubility in pure iron. Even at these high concentration levels, no nitrides formed. The nitrogen remained in solution even after consolidation by hot isostatic pressing ("hipping"). The presence of nitrogen retarded grain growth during consolidation.
CODEN
MMTAEB
Publication Date
19940201
Document Type
Journal Article
Fiscal Year
1994
NTIS Accession No.
NTIS Price
Identifying No.
OP 54-94
ISSN
1073-5623
NIOSH Division
ALRC
Source Name
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
State
OR
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