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Elevated Temperature Deformation of Fe-39.8Al and Fe-15.6Mn-39.4Al
AUTHOR | Administration (Nasa), National Aeronaut |
PUBLISHER | Independently Published (08/05/2020) |
PRODUCT TYPE | Paperback (Paperback) |
Description
The elevated temperature compressive properties of binary Fe-39.8 at % Al and Fe-15.6Mn-39.4Al have been measured between 1000 and 1300 K at strain rates between 10(exp 7) and 10(exp 3)/ s. Although the Mn addition to iron aluminide did not change the basic deformation characteristics, the Mn-modified alloy was slightly weaker. In the regime where deformation of FeAl occurs by a high stress exponent mechanism (n = 6), strength increases as the grain size decreases at least for diameters between approx. 200 and approx. 10 microns. Due to the limitation in the grain size-flow stress-temperature-strain rate database, the influence of further reductions of the grain size on strength is uncertain. Based on the appearance of subgrains in deformed iron aluminide, the comparison of grain diameters to expected subgrain sizes, and the grain size exponent and stress exponent calculated from deformation experiments, it is believed that grain size strengthening is the result of an artificial limitation on subgrain size as proposed by Sherby, Klundt and Miller. Whittenberger, J. Daniel Glenn Research Center NASA/TM-2004-212947, NAS 1.15:212947, E-14237-1 WBS-22-708-31-04 HIGH TEMPERATURE; MANGANESE ALLOYS; IRON ALUMINIDES; DEFORMATION; STRESS-STRAIN RELATIONSHIPS; GRAIN SIZE; EXPONENTS; DIAMETERS; DATA BASES
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Product Format
Product Details
ISBN-13:
9798672463124
Binding:
Paperback or Softback (Trade Paperback (Us))
Content Language:
English
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Page Count:
34
Carton Quantity:
120
Product Dimensions:
8.50 x 0.07 x 11.02 inches
Weight:
0.23 pound(s)
Country of Origin:
US
Subject Information
BISAC Categories
Reference | Research
Reference | Space Science - General
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The elevated temperature compressive properties of binary Fe-39.8 at % Al and Fe-15.6Mn-39.4Al have been measured between 1000 and 1300 K at strain rates between 10(exp 7) and 10(exp 3)/ s. Although the Mn addition to iron aluminide did not change the basic deformation characteristics, the Mn-modified alloy was slightly weaker. In the regime where deformation of FeAl occurs by a high stress exponent mechanism (n = 6), strength increases as the grain size decreases at least for diameters between approx. 200 and approx. 10 microns. Due to the limitation in the grain size-flow stress-temperature-strain rate database, the influence of further reductions of the grain size on strength is uncertain. Based on the appearance of subgrains in deformed iron aluminide, the comparison of grain diameters to expected subgrain sizes, and the grain size exponent and stress exponent calculated from deformation experiments, it is believed that grain size strengthening is the result of an artificial limitation on subgrain size as proposed by Sherby, Klundt and Miller. Whittenberger, J. Daniel Glenn Research Center NASA/TM-2004-212947, NAS 1.15:212947, E-14237-1 WBS-22-708-31-04 HIGH TEMPERATURE; MANGANESE ALLOYS; IRON ALUMINIDES; DEFORMATION; STRESS-STRAIN RELATIONSHIPS; GRAIN SIZE; EXPONENTS; DIAMETERS; DATA BASES
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