skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Differences in the microstructure of iron mechanically processed powder alloyed with interstitial and substitutional elements

Abstract

Mechanically processing iron powder with interstitial and substitutional elements resulted in different microstructures (grain size, rms-strains, and phases) depending upon the alloying composition. Alloying iron powder with substitutional elements (approximately 4 at% Al, Cr, Nb, and Ti) resulted in a microstructure similar to mechanically processed iron powder: grain size ≈7nm, local, rms strain ≈0.5%, and bcc-Fe nanograins. Small reductions in grain size and increase in rms strain occurred with increasing radius of the substitute alloy atoms. Substitutional atoms were not uniformly distributed throughout the bcc-Fe matrix, but were distributed in clusters within the nanosgrains and/or as a thin coating on the grain boundaries. Alloying iron powder with interstitial elements (4–8 at% C and N) resulted in significantly different microstructures: decrease in grain size and increase in rms-strain occurred with inceasing the interstitial concentration and a bct-Fe nanograin phase developed. Interstitial atoms were also predominately distributed in clusters and/ or in a thin region along or in the grain boundaries of the iron nanograins.

Authors:
; ;  [1];  [1]
  1. Old Dominion University, Norfolk VA
Publication Date:
Research Org.:
Albany Research Center (ARC), Albany, OR
Sponsoring Org.:
USDOE - Office of Fossil Energy (FE)
OSTI Identifier:
923367
Report Number(s):
DOE/ARC-1997-017
Journal ID: ISSN 0965-9773; TRN: US200804%%1090
DOE Contract Number:  
None cited
Resource Type:
Journal Article
Journal Name:
NanoStructured Materials
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1-8; Conference: Third International Conference on Nanostructured Materials (NANO’96), Kona, HI, July 8-12,1996; Journal ID: ISSN 0965-9773
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; ATOMS; COATINGS; GRAIN BOUNDARIES; GRAIN SIZE; INTERSTITIALS; IRON; MICROSTRUCTURE; PROCESSING; STRAINS

Citation Formats

Rawers, J C, Krabbe, R A, Cook, D C, and Kim, T H. Differences in the microstructure of iron mechanically processed powder alloyed with interstitial and substitutional elements. United States: N. p., 1997. Web. doi:10.1016/S0965-9773(97)00039-1.
Rawers, J C, Krabbe, R A, Cook, D C, & Kim, T H. Differences in the microstructure of iron mechanically processed powder alloyed with interstitial and substitutional elements. United States. doi:10.1016/S0965-9773(97)00039-1.
Rawers, J C, Krabbe, R A, Cook, D C, and Kim, T H. Wed . "Differences in the microstructure of iron mechanically processed powder alloyed with interstitial and substitutional elements". United States. doi:10.1016/S0965-9773(97)00039-1.
@article{osti_923367,
title = {Differences in the microstructure of iron mechanically processed powder alloyed with interstitial and substitutional elements},
author = {Rawers, J C and Krabbe, R A and Cook, D C and Kim, T H},
abstractNote = {Mechanically processing iron powder with interstitial and substitutional elements resulted in different microstructures (grain size, rms-strains, and phases) depending upon the alloying composition. Alloying iron powder with substitutional elements (approximately 4 at% Al, Cr, Nb, and Ti) resulted in a microstructure similar to mechanically processed iron powder: grain size ≈7nm, local, rms strain ≈0.5%, and bcc-Fe nanograins. Small reductions in grain size and increase in rms strain occurred with increasing radius of the substitute alloy atoms. Substitutional atoms were not uniformly distributed throughout the bcc-Fe matrix, but were distributed in clusters within the nanosgrains and/or as a thin coating on the grain boundaries. Alloying iron powder with interstitial elements (4–8 at% C and N) resulted in significantly different microstructures: decrease in grain size and increase in rms-strain occurred with inceasing the interstitial concentration and a bct-Fe nanograin phase developed. Interstitial atoms were also predominately distributed in clusters and/ or in a thin region along or in the grain boundaries of the iron nanograins.},
doi = {10.1016/S0965-9773(97)00039-1},
journal = {NanoStructured Materials},
issn = {0965-9773},
number = 1-8,
volume = 9,
place = {United States},
year = {1997},
month = {1}
}