Nitrogen addition to bcc-Fe by attrition milling

Journal Article · Fri Jan 01 00:00:00 EST 1999 · Materials Science Forum

DOI:https://doi.org/10.4028/www.scientific.net/MSF.318-320.695· OSTI ID:759226

Rawers, J; Krabbe, R; Cook, D

To enhance the nitrogen solubility in bcc-Fe, iron powder and blends of iron and iron nitride powders were attrition-milled in nitrogen gas. X-ray diffraction and Moessbauer spectroscopy were used to characterize the milled microstructure and to characterize the nitrogen distribution. After processing for 150 hours, the infused nitrogen was determined to be interstitial (locally deforming the bcc-Fe lattice to a bct-Fe lattice) and associated with the outer layer of the bcc-Fe nanograin. Nitrogen stabilized the milled grain structure but at elevated temperatures rapidly came to thermodynamical equilibrium, transforming from bcc-Fe(N) to bcc-Fe and Fe{sub 4}N.

• Research Organization: Albany Research Center, Albany, OR (US)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE) (US)
• OSTI ID: 759226
• Report Number(s): DOE/ARC-1999-001; TRN: AH200033%%201
• Journal Information: Materials Science Forum, Vol. 318-320; Conference: High Nitrogen Steels '98 (5th International Conference on High Nitrogen Steels), Espoo, Finland, May 24-26, 1998 and Stockholm, Sweden, May 27-28, 1998; Other Information: Published by Trans Tech Publications, Switzerland; PBD: 1 Jan 1999; PBD: 1 Jan 1999; ISSN 0255-5476
• Publisher: Trans Tech Publications, Switzerland
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON
NITROGEN ADDITIONS
BCC LATTICES
MILLING
MICROSTRUCTURE
IRON NITRIDES
CRYSTAL-PHASE TRANSFORMATIONS
SOLUBILITY
ATTRITION MILLING
NITROGEN
BCC-FE
BCT-FE
IRON-ALLOYING
NANOSTRUCTURE