Journal ArticleDOI
Critical stress for twinning nucleation in CrCoNi-based medium and high entropy alloys
He Huang,Xiaoqing Li,Zhihua Dong,Wei Li,Shuo Huang,Daqiao Meng,Xinchun Lai,Tianwei Liu,Shengfa Zhu,Levente Vitos +9 more
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TLDR
In this paper, an extended twinning nucleation Peierls-Nabarro (P-N) model was used to predict the twinning critical resolved shear stress (CRSS) of face-centered cubic (FCC) CrCoNi-based MHEAs.About:
This article is published in Acta Materialia.The article was published on 2018-05-01. It has received 122 citations till now. The article focuses on the topics: Crystal twinning & Critical resolved shear stress.read more
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Tunable stacking fault energies by tailoring local chemical order in CrCoNi medium-entropy alloys.
TL;DR: This theoretical study demonstrates that chemical short-range order is thermodynamically favored in HEAs and can be tuned to affect the mechanical behavior of these alloys.
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Lattice distortion in a strong and ductile refractory high-entropy alloy
Chanho Lee,Gian Song,Michael C. Gao,Rui Feng,Peiyong Chen,Jamieson Brechtl,Yan Chen,Ke An,Wei Guo,Jonathan D. Poplawsky,Song Li,A.T. Samaei,Wei Chen,Alice Hu,Hahn Choo,Peter K. Liaw +15 more
TL;DR: In this paper, a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach was developed.
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Ab initio phase stabilities and mechanical properties of multicomponent alloys: A comprehensive review for high entropy alloys and compositionally complex alloys
TL;DR: In this article, a general thermodynamic framework is laid down that provides a bridge between the quantities accessible with DFT and the targeted thermodynamic and mechanical properties, and it is shown how chemical disorder and various finite-temperature excitations can be modeled with density functional theory.
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Achieving ultra-high strength and ductility in equiatomic CrCoNi with partially recrystallized microstructures
TL;DR: In this article, cold-rolling and annealing an equiatomic CrCoNi alloy was used to produce heterogeneous, partially recrystallized microstructures. And the results showed that this approach dramatically increased the yield strength (to ∼1100 MPa) while retaining good ductility (total elongation ∼23%).
Journal ArticleDOI
Additive manufacturing of high entropy alloys: A practical review
Ahmad Ostovari Moghaddam,Nataliya Shaburova,M. N. Samodurova,Amin Abdollahzadeh,Evgeny A. Trofimov +4 more
TL;DR: In this article, the state of the art in additive manufacturing of high entropy alloys (HEAs) is provided, and a comprehensive picture of the current state of nearly all HEAs processed by laser metal deposition, selective laser melting and selective electron beam melting is presented.
References
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Journal ArticleDOI
Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
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Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes
Jien-Wei Yeh,Swe-Kai Chen,Su-Jien Lin,Jon-Yiew Gan,Tsung-Shune Chin,Tsung-Shune Chin,Tao-Tsung Shun,Chun-Huei Tsau,Shou-Yi Chang +8 more
TL;DR: A new approach for the design of alloys is presented in this paper, where high-entropy alloys with multi-principal elements were synthesized using well-developed processing technologies.
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Microstructural development in equiatomic multicomponent alloys
Brian Cantor,Brian Cantor,I.T.H. Chang,I.T.H. Chang,P. Knight,P. Knight,A.J.B. Vincent,A.J.B. Vincent +7 more
TL;DR: In this paper, it was shown that the confusion principle does not apply, and other factors are more important in promoting glass formation of late transition metal rich multicomponent alloys.
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A fracture-resistant high-entropy alloy for cryogenic applications
Bernd Gludovatz,Anton Hohenwarter,Dhiraj Catoor,Edwin H. Chang,Easo P. George,Easo P. George,Robert O. Ritchie,Robert O. Ritchie +7 more
TL;DR: This work examined a five-element high-entropy alloy, CrMnFeCoNi, which forms a single-phase face-centered cubic solid solution, and found it to have exceptional damage tolerance with tensile strengths above 1 GPa and fracture toughness values exceeding 200 MPa·m1/2.
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Metastable high-entropy dual-phase alloys overcome the strength–ductility trade-off
TL;DR: In this metastability-engineering strategy, a transformation-induced plasticity-assisted, dual-phase high-entropy alloy (TRIP-DP-HEA) is designed, which combines the best of two worlds: extensive hardening due to the decreased phase stability known from advanced steels and massive solid-solution strengthening of high-ENTropy alloys.