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Title: Effect of cold rolling on the microstructure and mechanical properties of Al0.25CoCrFe1.25Ni1.25 high-entropy alloy

Journal Article · · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
 [1];  [2];  [1];  [1];  [1];  [3];  [1]
  1. Taiyuan Univ. of Technology, Taiyuan (China)
  2. National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM Corp., Albany, OR (United States)
  3. National Energy Technology Lab. (NETL), Albany, OR (United States)

Cold rolling can break down the as-cast dendrite microstructure and thus may have pronounced impact on the mechanical behavior of the alloy. In the present study, the effect of cold rolling on the microstructure and mechanical properties of Al0.25CoCrFe1.25Ni1.25 high-entropy alloy in the face-centered cubic structure was investigated. With increasing the thickness reduction from cold rolling, the hardness, the yield strength, and the fracture strength increased at the cost of reducing ductility. At the thickness reduction of 80%, the tensile strength (hardness) was 702 MPa (406 MPa), 1.62 (2.43) times that in the as-cast condition. Compared to traditional alloys, Al0.25CoCrFe1.25Ni1.25 has the highest hardening rate with respect to CR thickness reduction. Here, the phase relation and the mixing properties of Gibbs free energy, enthalpy and entropy of AlxCoCrFe1.25Ni1.25 were predicted using the CALPHAD method.

Research Organization:
National Energy Technology Lab. (NETL), Albany, OR (United States); National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States); National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FE0004000; 51371122; 2015021005; 51401141; 2013-Z03; 2014021017-3; 11390362
OSTI ID:
1258469
Alternate ID(s):
OSTI ID: 1258466; OSTI ID: 1797371
Report Number(s):
A-CONTR-PUB-054; A-CONTR-PUB-055; PII: 788
Journal Information:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Vol. 645, Issue C; ISSN 0921-5093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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Cited By (8)

Effect of carbon content and annealing on structure and hardness of CrFe2NiMnV0.25 high-entropy alloys processed by high-pressure torsion journal May 2018
Prediction of the Composition and Hardness of High-Entropy Alloys by Machine Learning journal July 2019
Fully Recrystallized Al0.5CoCrFeNi High-Entropy Alloy Strengthened by Nanoscale Precipitates journal May 2019
Evolution of microstructure and hardness in a dual-phase Al0.5CoCrFeNi high-entropy alloy with different grain sizes journal September 2019
High-entropy alloy CoCrFeMnNi produced by powder metallurgy journal March 2017
Room temperature wear study of Al 0.4 FeCrNiCo x ( x = 0, 0.25, 0.5, 1.0 mol) high-entropy alloys under oil lubricating conditions journal February 2019
Microstructure and Mechanical Properties Evolution of the Al, C-Containing CoCrFeNiMn-Type High-Entropy Alloy during Cold Rolling journal December 2017
Deformation Behavior of Al0.25CoCrFeNi High-Entropy Alloy after Recrystallization journal March 2017

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