MEDIUM-ENTROPY ALLOY HAVING EXCELLENT CRYOGENIC CHARACTERISTICS

Title:

MEDIUM-ENTROPY ALLOY HAVING EXCELLENT CRYOGENIC CHARACTERISTICS

Document Type and Number:

WIPO Patent Application WO/2019/022283

Kind Code:

A1

Abstract:

The present invention relates to a medium-entropy alloy capable of further improving the cryogenic mechanical properties of a conventional FCC-based high-entropy alloy and ensuring price competitiveness. The medium-entropy alloy according to the present invention comprises 6-15 at% of Cr, 50-64 at% of Fe, 13-25 at% of Co, 13-25 at% of Ni and the balance of inevitable impurities, and comprises a metastable FCC phase so as to cause strain-induced phase transformation from an FCC phase to a BCC phase during the plastic deformation of an alloy, thereby having excellent cryogenic mechanical properties.

Inventors:

KIM HYOUNG-SEOP (KR)
MOON JONG-UN (KR)
BAE JAE-WUNG (KR)

Application Number:

PCT/KR2017/009364

Publication Date:

January 31, 2019

Filing Date:

August 28, 2017

Export Citation:

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Assignee:

POSTECH ACAD IND FOUND (KR)

International Classes:

C22C38/52

Foreign References:

US20160326616A1	2016-11-10
KR20160014130A	2016-02-11
JP2016023364A	2016-02-08
US20020159914A1	2002-10-31

Other References:

GALI A. ET AL.: "Tensile Properties of High- and Medium-entropy Alloys", INTERMETALLICS, vol. 39, 2013, pages 74 - 78, XP028591065
GLUDOVATZ ET AL.: "Exceptional Damage-tolerance of a Medium-entropy Alloy CrC'oNi at Cryogenic Temperatures", NATURE COMMUNICATIONS, 2 February 2016 (2016-02-02), XP055563185
B. GLUDOVATZ ET AL.: "A fracture-resistant high-entropy alloy for cryogenic applications", SCIENCE, vol. 345, 2014, pages 1153 - 1158
See also references of EP 3660178A4

Attorney, Agent or Firm:

LEE, Han-Ook (KR)

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