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Title: Tensile properties of cast and mechanically alloyed FeAl with high boron content

Abstract

The FeAl with B2 structure has been considered as a potential structural material for use at elevated temperatures and severe environment. Two major problems with this polycrystalline aluminide are its brittleness through cleavage or grain boundary failure at ambient temperature and rapid strength drop at high temperatures above 750K. In order to expand the use of iron aluminide, these two problems must be overcome. Making a grain size small might be one of the effective ways as the stress distribution is more homogeneous throughout the material. Another method to increase the ductility of iron rich FeAl seems to add small amount of boron. Webb reported that the optimum B content for ambient temperature ductility enhancement was approximately 12 wppm in FeAl(40at%Al). With these points in mind, the authors have tried to modify room and high temperature mechanical properties of FeAl by mechanical alloying. The mechanical alloying is a unique process in that it is an entirely solid state process, permitting fine distribution of insoluble phases and fine grain size material. This paper compares the mechanical properties of the cast and the mechanically alloyed FeAl with B as much as 0.3wt%. The highest B content added in iron rich FeAl wasmore » reported to be 0.2wt% up to now.« less

Authors:
;  [1]
  1. Korea Univ., Seoul (Korea, Republic of). Dept. of Metallurgical Engineering
Publication Date:
OSTI Identifier:
271577
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 35; Journal Issue: 3; Other Information: PBD: 1 Aug 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON ALLOYS; MILLING; TENSILE PROPERTIES; ALUMINIUM ALLOYS; BORON; METALLURGICAL EFFECTS; INTERMETALLIC COMPOUNDS; POWDERS; HOT WORKING; EXTRUSION; CHEMICAL COMPOSITION; STRESSES; STRAINS; TEMPERATURE DEPENDENCE; ELONGATION; OPTICAL MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; DUCTILITY

Citation Formats

Kim, M H, and Kwun, S I. Tensile properties of cast and mechanically alloyed FeAl with high boron content. United States: N. p., 1996. Web. doi:10.1016/1359-6462(96)00133-9.
Kim, M H, & Kwun, S I. Tensile properties of cast and mechanically alloyed FeAl with high boron content. United States. https://doi.org/10.1016/1359-6462(96)00133-9
Kim, M H, and Kwun, S I. 1996. "Tensile properties of cast and mechanically alloyed FeAl with high boron content". United States. https://doi.org/10.1016/1359-6462(96)00133-9.
@article{osti_271577,
title = {Tensile properties of cast and mechanically alloyed FeAl with high boron content},
author = {Kim, M H and Kwun, S I},
abstractNote = {The FeAl with B2 structure has been considered as a potential structural material for use at elevated temperatures and severe environment. Two major problems with this polycrystalline aluminide are its brittleness through cleavage or grain boundary failure at ambient temperature and rapid strength drop at high temperatures above 750K. In order to expand the use of iron aluminide, these two problems must be overcome. Making a grain size small might be one of the effective ways as the stress distribution is more homogeneous throughout the material. Another method to increase the ductility of iron rich FeAl seems to add small amount of boron. Webb reported that the optimum B content for ambient temperature ductility enhancement was approximately 12 wppm in FeAl(40at%Al). With these points in mind, the authors have tried to modify room and high temperature mechanical properties of FeAl by mechanical alloying. The mechanical alloying is a unique process in that it is an entirely solid state process, permitting fine distribution of insoluble phases and fine grain size material. This paper compares the mechanical properties of the cast and the mechanically alloyed FeAl with B as much as 0.3wt%. The highest B content added in iron rich FeAl was reported to be 0.2wt% up to now.},
doi = {10.1016/1359-6462(96)00133-9},
url = {https://www.osti.gov/biblio/271577}, journal = {Scripta Materialia},
number = 3,
volume = 35,
place = {United States},
year = {Thu Aug 01 00:00:00 EDT 1996},
month = {Thu Aug 01 00:00:00 EDT 1996}
}