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  • 1970-1974  (1)
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    Tough cryogenic alloys from the Fe-Mn and Fe-Mn-Cr systems (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: By adjusting composition, metastable gamma (austenite) and epsilon (hexagonal) martensite may be retained in Fe-Mn and Fe-Mn-Cr alloys and used to impact toughness through the TRIP mechanism. The resulting alloys have excellent toughness at cryogenic temperatures. The best alloys obtained to date are: Fe-20Mn, with sigma (sub y) = 79ksi and K sub IC = 275ksi square root of (in) at 77 K, and Fc-16Mn-8Cr, with sigma sub y = 85ksi and K sub IC = 72ksi square root of (in) at 77 K.
    Keywords: METALLIC MATERIALS
    Type: NASA-CR-134688
    Format: application/pdf
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