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Title: Effects of composition and heat treatments on the strength and ductility of Fe-Cr-Co alloys

Abstract

The relationship between the microstructure and mechanical properties of spinodally decomposed Fe-Cr-Co ductile permanent magnet alloys was investigated using transmission electron microscopy, electron diffraction, tensile testing, and Charpy impact testing. Isothermal aging and step aging of four alloys (Fe-28 wt % Cr-15 wt % Co, Fe-23 wt % Cr-15-wt % Co-5 wt % V, Fe-23 wt % Cr-15 wt % Co-3 wt % V-2 wt % Ti, and Fe-31 wt % Cr-23 % Co) resulted in decomposition into two phases, an Fe-Co rich (..cap alpha../sub 1/) phase and a Cr rich (..cap alpha../sub 2/) phase. The microstructural features of the decomposition products were consistent with those expected from a spinodal reaction and agree with the reported work on the Fe-Cr-Co system. An Fe-23 wt % Cr-15 wt % Co-5 wt % V alloy was found to have, among the four alloys, the best combinations of strength and ductility.

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
5226157
Report Number(s):
LBL-9941
TRN: 80-014693
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Other Information: Thesis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHROMIUM ALLOYS; MECHANICAL PROPERTIES; MICROSTRUCTURE; COBALT ALLOYS; IRON BASE ALLOYS; VANADIUM ALLOYS; TITANIUM ALLOYS; MAGNETS; ALLOYS; CRYSTAL STRUCTURE; IRON ALLOYS; 360102* - Metals & Alloys- Structure & Phase Studies; 360103 - Metals & Alloys- Mechanical Properties

Citation Formats

Kubarych, K G. Effects of composition and heat treatments on the strength and ductility of Fe-Cr-Co alloys. United States: N. p., 1980. Web. doi:10.2172/5226157.
Kubarych, K G. Effects of composition and heat treatments on the strength and ductility of Fe-Cr-Co alloys. United States. https://doi.org/10.2172/5226157
Kubarych, K G. 1980. "Effects of composition and heat treatments on the strength and ductility of Fe-Cr-Co alloys". United States. https://doi.org/10.2172/5226157. https://www.osti.gov/servlets/purl/5226157.
@article{osti_5226157,
title = {Effects of composition and heat treatments on the strength and ductility of Fe-Cr-Co alloys},
author = {Kubarych, K G},
abstractNote = {The relationship between the microstructure and mechanical properties of spinodally decomposed Fe-Cr-Co ductile permanent magnet alloys was investigated using transmission electron microscopy, electron diffraction, tensile testing, and Charpy impact testing. Isothermal aging and step aging of four alloys (Fe-28 wt % Cr-15 wt % Co, Fe-23 wt % Cr-15-wt % Co-5 wt % V, Fe-23 wt % Cr-15 wt % Co-3 wt % V-2 wt % Ti, and Fe-31 wt % Cr-23 % Co) resulted in decomposition into two phases, an Fe-Co rich (..cap alpha../sub 1/) phase and a Cr rich (..cap alpha../sub 2/) phase. The microstructural features of the decomposition products were consistent with those expected from a spinodal reaction and agree with the reported work on the Fe-Cr-Co system. An Fe-23 wt % Cr-15 wt % Co-5 wt % V alloy was found to have, among the four alloys, the best combinations of strength and ductility.},
doi = {10.2172/5226157},
url = {https://www.osti.gov/biblio/5226157}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 1980},
month = {Sun Jun 01 00:00:00 EDT 1980}
}