NIOSHTIC-2 Publications Search

Understanding mechanical infusion of nitrogen into iron powders.

Authors
Rawers JC; Maurice D
Source
Acta Metall Mater 1995 Nov; 43(11):4101-4107
NIOSHTIC No.
10005937
Abstract
Nitrogen alloying of iron-based metals greatly improves mechanical and corrosion properties. However, nitrogen solubility is less than 0.1 weight percent (wt%) in b.c.c iron. In this study nitrogen concentrations in excess of 1 wt% were obtained by high-energy milling of pure iron powders in a nitrogen gas environment. The nitrogen concentration in the powder, the grain size, and internal strain in the mechanically processed iron powder were determined as functions of processing time in both nitrogen and argon gas environments. The contributions of plastic deformation and interstitial nitrogen to changes in lattice d-spacing, and the distribution of nitrogen between interstitial sites and defect sites were estimated. Approximately 25% of the incorporated nitrogen was contained in interstitial sites, with the remainder associated with defect structures and surfaces.
Keywords
Iron; Iron compounds; Metallurgy; Metallurgical processes
CODEN
AMATEB
Publication Date
19951101
Document Type
Journal Article
Fiscal Year
1996
Identifying No.
OP 211-95
Issue of Publication
11
ISSN
0956-7151
NIOSH Division
ALRC
Source Name
Acta Metallurgicia Et Materialia
State
OR
Page last reviewed: October 26, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division