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Title: Oxidation resistant high-entropy alloys

Abstract

Disclosed herein are new face-centered cubic (f.c.c.) high-entropy alloys with compositions (in atomic %) of Fe.sub.aNi.sub.bMn.sub.cAl.sub.dCr.sub.eC.sub.f where a is between 37-43 atomic %, b is between 8-14 atomic %, c is between 32-38 atomic %, d is 4.5-10.5 atomic %, e is between 2.5-9 atomic % and f is between 0-2 atomic %. The undoped alloy has strength of 159 MPa and 40% elongation to failure, but the doped, carbon-containing alloy having 1.1 atomic percent carbon has yield strength of 360 MPa, an ultimate tensile strength (UTS) of 1200 MPa and 50% elongation to failure at room temperature. At 700.degree. C., the yield strength is 214 MPa with 24% elongation to failure. Thus, the present alloy may replace austenitic stainless steels in applications where better strength is needed at both room temperature and elevated temperature in an oxidation resistant alloy.

Inventors:
;
Issue Date:
Research Org.:
Dartmouth College, Hanover, NH (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1500037
Patent Number(s):
10190197
Application Number:
15/374,322
Assignee:
The Trustees of Dartmouth College (Hanover, NH)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
DOE Contract Number:  
FG02-07ER46392
Resource Type:
Patent
Resource Relation:
Patent File Date: 2016 Dec 09
Country of Publication:
United States
Language:
English

Citation Formats

Baker, Ian, and Wang, Zhangwei. Oxidation resistant high-entropy alloys. United States: N. p., 2019. Web.
Baker, Ian, & Wang, Zhangwei. Oxidation resistant high-entropy alloys. United States.
Baker, Ian, and Wang, Zhangwei. Tue . "Oxidation resistant high-entropy alloys". United States.
@article{osti_1500037,
title = {Oxidation resistant high-entropy alloys},
author = {Baker, Ian and Wang, Zhangwei},
abstractNote = {Disclosed herein are new face-centered cubic (f.c.c.) high-entropy alloys with compositions (in atomic %) of Fe.sub.aNi.sub.bMn.sub.cAl.sub.dCr.sub.eC.sub.f where a is between 37-43 atomic %, b is between 8-14 atomic %, c is between 32-38 atomic %, d is 4.5-10.5 atomic %, e is between 2.5-9 atomic % and f is between 0-2 atomic %. The undoped alloy has strength of 159 MPa and 40% elongation to failure, but the doped, carbon-containing alloy having 1.1 atomic percent carbon has yield strength of 360 MPa, an ultimate tensile strength (UTS) of 1200 MPa and 50% elongation to failure at room temperature. At 700.degree. C., the yield strength is 214 MPa with 24% elongation to failure. Thus, the present alloy may replace austenitic stainless steels in applications where better strength is needed at both room temperature and elevated temperature in an oxidation resistant alloy.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

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