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Title: THE EFFECT OF IMPURITIES ON IRON-CHROMIUM-YTTRIUM ALLOYS

Abstract

A study was made of the effect of carbon, manganese, oxygen, palladium, and sulfur on the structure and fabricability of iron-35 wt.% chronium-1 wt.% yttrium alloy. Using a vacuum-induction melting technique each of the additives except oxygen was introduced to 1-lb remelts of a single 15-lb master alloy. The master alloy and remelts were made under similar melting, pouring, and casting conditions. Oxygen was introduced as Fe/sub 2/0/sub 2/ by inertelectrode arc melting to avoid extraneous, uncontrolled contamination stemming from crucible contact. Photomicrographs were prepared of as-cast metal illustrating structural variations. Ingots obtained were fabricated to 0.050-in. sheet at 2000 deg F to compare fabrication characteristics with those of the control ingot containing no additives. As a qualitative measure of metal soundness and ductility, a portion of each of the 0.050-in. sheets was further reduced at room temperatare to 3-mil foil. During melting at 2900 to 3000 deg F under controlled conditions, the amount of yttrium present in the charge was reduced roughly 50% by reaction with the alumina crucible. Sulfide, added as FeS, and oxide additions also lowered the amount of yttrium retained in ingots. The maximum amount of sulfur retained in an alloy of nominal composition iron-35 wt.%more » chromium--1 wt.% yttrium--500 ppm sulfur was found to be about 80 ppm, and an alloy containing this amount of sulfur seemed to show slightly improved fabrication characteristics. None of the impurities investigated affected the fabrication characteristics or the quality of the finished product sufficiently to be considered detrimental from this point of view. (auth)« less

Authors:
; ; ;
Publication Date:
Research Org.:
Battelle Memorial Inst., Columbus, Ohio
OSTI Identifier:
4212635
Report Number(s):
BMI-1338
NSA Number:
NSA-14-001813
DOE Contract Number:  
W-7405-ENG-92
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS, AND MATERIALS; ALUMINUM OXIDES- DUCTILITY- HIGH TEMPERATURE- IRON SULFIDES- MEASURED VALUES- MICROSCOPY- PHOTOGRAPHIC FILM- PREPARATION- SHEETS- VARIATIONS; CARBON- CASTING- CHROMIUM ALLOYS- CONTAMINATION- CRUCIBLES- ELECTRIC ARCS- ELECTRODES- FABRICATION- IMPURITIES- INDUCTION- INERT GASES- IRON ALLOYS- IRON OXIDES- LATTICES- MANGANESE- MELTING- OXYGEN- - PALLADIUM- SULFUR- VACUUM- YTTRIUM ALLOYS

Citation Formats

Endebrock, R.W., Chubb, W., Foster, E.L., and Dickerson, R.F. THE EFFECT OF IMPURITIES ON IRON-CHROMIUM-YTTRIUM ALLOYS. United States: N. p., 1959. Web. doi:10.2172/4212635.
Endebrock, R.W., Chubb, W., Foster, E.L., & Dickerson, R.F. THE EFFECT OF IMPURITIES ON IRON-CHROMIUM-YTTRIUM ALLOYS. United States. doi:10.2172/4212635.
Endebrock, R.W., Chubb, W., Foster, E.L., and Dickerson, R.F. Mon . "THE EFFECT OF IMPURITIES ON IRON-CHROMIUM-YTTRIUM ALLOYS". United States. doi:10.2172/4212635. https://www.osti.gov/servlets/purl/4212635.
@article{osti_4212635,
title = {THE EFFECT OF IMPURITIES ON IRON-CHROMIUM-YTTRIUM ALLOYS},
author = {Endebrock, R.W. and Chubb, W. and Foster, E.L. and Dickerson, R.F.},
abstractNote = {A study was made of the effect of carbon, manganese, oxygen, palladium, and sulfur on the structure and fabricability of iron-35 wt.% chronium-1 wt.% yttrium alloy. Using a vacuum-induction melting technique each of the additives except oxygen was introduced to 1-lb remelts of a single 15-lb master alloy. The master alloy and remelts were made under similar melting, pouring, and casting conditions. Oxygen was introduced as Fe/sub 2/0/sub 2/ by inertelectrode arc melting to avoid extraneous, uncontrolled contamination stemming from crucible contact. Photomicrographs were prepared of as-cast metal illustrating structural variations. Ingots obtained were fabricated to 0.050-in. sheet at 2000 deg F to compare fabrication characteristics with those of the control ingot containing no additives. As a qualitative measure of metal soundness and ductility, a portion of each of the 0.050-in. sheets was further reduced at room temperatare to 3-mil foil. During melting at 2900 to 3000 deg F under controlled conditions, the amount of yttrium present in the charge was reduced roughly 50% by reaction with the alumina crucible. Sulfide, added as FeS, and oxide additions also lowered the amount of yttrium retained in ingots. The maximum amount of sulfur retained in an alloy of nominal composition iron-35 wt.% chromium--1 wt.% yttrium--500 ppm sulfur was found to be about 80 ppm, and an alloy containing this amount of sulfur seemed to show slightly improved fabrication characteristics. None of the impurities investigated affected the fabrication characteristics or the quality of the finished product sufficiently to be considered detrimental from this point of view. (auth)},
doi = {10.2172/4212635},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {4}
}