Global Patent Index - EP 3660178 A4

EP 3660178 A4 20200603 - MEDIUM-ENTROPY ALLOY HAVING EXCELLENT CRYOGENIC CHARACTERISTICS

Title (en)

MEDIUM-ENTROPY ALLOY HAVING EXCELLENT CRYOGENIC CHARACTERISTICS

Title (de)

LEGIERUNG MIT MITTELHOHER ENTROPIE UND HERVORRAGENDEN KRYOGENEN EIGENSCHAFTEN

Title (fr)

ALLIAGE À ENTROPIE MOYENNE AYANT D'EXCELLENTES CARACTÉRISTIQUES CRYOGÉNIQUES

Publication

EP 3660178 A4 20200603 (EN)

Application

EP 17912348 A 20170828

Priority

  • KR 20170094759 A 20170726
  • KR 2017009364 W 20170828

Abstract (en)

[origin: EP3660178A1] Disclosed is a medium-entropy alloy, which is further improved in cryogenic mechanical properties of an existing FCC-based high-entropy alloy and is capable of ensuring price competitiveness, the medium-entropy alloy including 6 to 15 at% of Cr, 50 to 64 at% of Fe, 13 to 25 at% of Co, 13 to 25 at% of Ni, and the remainder of inevitable impurities, wherein the medium-entropy alloy includes a metastable FCC phase, whereby deformation-induced phase transformation from an FCC phase into a BCC phase occurs upon plastic deformation of the alloy, thus manifesting excellent cryogenic mechanical properties.

IPC 8 full level

C22C 38/52 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/30 (2006.01); C22C 38/38 (2006.01); C22C 38/44 (2006.01); C22C 38/58 (2006.01)

CPC (source: EP KR US)

C22C 38/06 (2013.01 - EP); C22C 38/08 (2013.01 - US); C22C 38/10 (2013.01 - US); C22C 38/105 (2013.01 - US); C22C 38/18 (2013.01 - US); C22C 38/22 (2013.01 - EP); C22C 38/30 (2013.01 - EP US); C22C 38/38 (2013.01 - EP US); C22C 38/40 (2013.01 - US); C22C 38/44 (2013.01 - EP); C22C 38/52 (2013.01 - EP KR US); C22C 38/58 (2013.01 - EP)

Citation (search report)

  • [X] WO 9000629 A1 19900125 - FAMCY STEEL CORP [US]
  • [X] US 3673010 A 19720627 - MATSUMOTO JIRO, et al
  • [X] HAKARU MASUMOTO ET AL: "The Strain Gage Factor and Electrical Properties of Fe-Cr-Co-Ni Alloys", JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS, vol. 47, no. 10, 31 October 1983 (1983-10-31), pages 879 - 884, XP055679916
  • [A] Y. H. JO ET AL: "Cryogenic strength improvement by utilizing room-temperature deformation twinning in a partially recrystallized VCrMnFeCoNi high-entropy alloy", NATURE COMMUNICATIONS, vol. 8, no. 1, 12 June 2017 (2017-06-12), XP055680269, DOI: 10.1038/ncomms15719
  • See references of WO 2019022283A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3660178 A1 20200603; EP 3660178 A4 20200603; EP 3660178 B1 20221019; JP 2019532169 A 20191107; KR 101910744 B1 20181022; US 2021054486 A1 20210225; WO 2019022283 A1 20190131

DOCDB simple family (application)

EP 17912348 A 20170828; JP 2018565038 A 20170828; KR 2017009364 W 20170828; KR 20170094759 A 20170726; US 201716308517 A 20170828