Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Strengthening mechanisms in high-entropy alloys
T2 - Perspectives for alloy design
AU - Rivera-Díaz-Del-Castillo, P.E.J.
AU - Fu, H.
PY - 2018/10/14
Y1 - 2018/10/14
N2 - High-entropy alloys (HEAs), originally introduced to the literature due to their ability to stabilize a single phase across large temperature ranges, have recently demonstrated to display multiphase systems undergoing a variety of strengthening mechanisms. Previous reports have focused on solid solution strengthening and precipitation hardening; however, other hardening mechanisms such as twinning and martensite formation have been reported to play a key role in controlling their mechanical behavior. Such deformation mechanisms display significant variations with temperature and strain rate. The present contribution provides an outline of the various hardening mechanisms reported in the literature for HEAs. For each mechanism, a modeling strategy is proposed to describe the associated mechanical behavior. The mechanisms are combined into a single framework to discover new HEAs of improved mechanical behavior. A strategy for HEA design is presented, and the advantages of adopting additive layer manufacturing to improve mechanical behavior are discussed. Copyright © Materials Research Society 2018.
AB - High-entropy alloys (HEAs), originally introduced to the literature due to their ability to stabilize a single phase across large temperature ranges, have recently demonstrated to display multiphase systems undergoing a variety of strengthening mechanisms. Previous reports have focused on solid solution strengthening and precipitation hardening; however, other hardening mechanisms such as twinning and martensite formation have been reported to play a key role in controlling their mechanical behavior. Such deformation mechanisms display significant variations with temperature and strain rate. The present contribution provides an outline of the various hardening mechanisms reported in the literature for HEAs. For each mechanism, a modeling strategy is proposed to describe the associated mechanical behavior. The mechanisms are combined into a single framework to discover new HEAs of improved mechanical behavior. A strategy for HEA design is presented, and the advantages of adopting additive layer manufacturing to improve mechanical behavior are discussed. Copyright © Materials Research Society 2018.
KW - microstructure
KW - salloy
KW - strength
KW - Age hardening
KW - Alloying
KW - Entropy
KW - Hardening
KW - Microstructure
KW - Strain rate
KW - Additive layer manufacturing
KW - Deformation mechanism
KW - Hardening mechanism
KW - Martensite Formation
KW - Multi phase systems
KW - Solid solution strengthening
KW - Strengthening mechanisms
KW - Mechanisms
U2 - 10.1557/jmr.2018.328
DO - 10.1557/jmr.2018.328
M3 - Journal article
VL - 33
SP - 2970
EP - 2982
JO - Journal of Materials Research
JF - Journal of Materials Research
SN - 0884-2914
IS - 19
ER -