Calculation-driven design of off-equiatomic high-entropy alloys with enhanced solid-solution strengthening

2021 ◽  
pp. 141359
Author(s):  
Jiaxiang Li ◽  
Kenta Yamanaka ◽  
Akihiko Chiba
Keyword(s):  
Solid Solution ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

Lattice distortion as an estimator of solid solution strengthening in high-entropy alloys

2021 ◽  
pp. 110877
Author(s):  
Ankit Roy ◽  
Praveen Sreeramagiri ◽  
Tomas Babuska ◽  
Brandon Krick ◽  
Pratik K. Ray ◽  
...  
Keyword(s):  
Solid Solution ◽  
Lattice Distortion ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

scholarly journals Solid solution strengthening theories of high-entropy alloys

2019 ◽  
Vol 151 ◽  
pp. 310-317 ◽  
Author(s):  
Carlyn R. LaRosa ◽  
Mulaine Shih ◽  
Céline Varvenne ◽  
Maryam Ghazisaeidi
Keyword(s):  
Solid Solution ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

High-throughput solid solution strengthening characterization in high entropy alloys

2019 ◽  
Vol 167 ◽  
pp. 1-11 ◽  
Author(s):  
Francisco Gil Coury ◽  
Paul Wilson ◽  
Kester D. Clarke ◽  
Michael J. Kaufman ◽  
Amy J. Clarke
Keyword(s):  
Solid Solution ◽  
High Throughput ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

scholarly journals Strengthening Mechanisms in CoCrFeNiX0.4 (Al, Nb, Ta) High Entropy Alloys Fabricated by Powder Plasma Arc Additive Manufacturing

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 721
Author(s):  
Yupeng Zhang ◽  
Qingkai Shen ◽  
Xizhang Chen ◽  
Subramanian Jayalakshmi ◽  
Ramachandra Arvind Singh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Atomic Radius ◽  
Eutectic Structure ◽  
Precipitation Strengthening ◽  
High Entropy Alloys ◽  
Plasma Arc ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

In high entropy alloys (HEAs), the addition of large-size atoms results in lattice distortion and further leads to solid solution strengthening or precipitation strengthening. However, the relationship between atomic radius, solid solution strengthening and precipitation strengthening has not been discerned yet. In this work, CoCrFeNiX0.4 (X = Al, Nb, Ta, with an equi-atomic radius) HEAs were prepared by powder plasma arc additive manufacturing (PPA-AM) and evaluated for their mechanical properties. Compression and nano-indentation hardness tests showed that the HEA with Ta showed the best properties. The influence of atomic radius and solid solubility on solid solution strengthening was investigated and the main strengthening mechanism that determines the mechanical properties of the developed HEAs was analyzed. The results showed that (i) the CoCrFeNiAl0.4 alloy did not show any solid solution strengthening effect and that a clear relation between solid solution strengthening and atomic size was not observed; (ii) in both CoCrFeNiTa0.4 and CoCrFeNiNb0.4 HEAs, precipitation strengthening and grain boundary strengthening effects are observed, wherein the difference in mechanical properties between both the alloys can be mainly attributed to the formation of fine eutectic structure in CoCrFeNiTa0.4; and (iii) from the microstructural analyses, it was identified that, in the CoCrFeNiTa0.4 HEA, the location containing a fine eutectic structure is accompanied by the formation of low-angle grain boundaries (LAGBs), which is also the region where deformed grains gather, giving rise to improved mechanical strengthening.

Modeling solid solution strengthening in high entropy alloys using machine learning

2021 ◽  
pp. 116917
Author(s):  
Cheng Wen ◽  
Changxin Wang ◽  
Yan Zhang ◽  
Stoichko Antonov ◽  
Dezhen Xue ◽  
...  
Keyword(s):  
Machine Learning ◽  
Solid Solution ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

scholarly journals Solid-solution strengthening in refractory high entropy alloys

2019 ◽  
Vol 175 ◽  
pp. 66-81 ◽  
Author(s):  
Francisco Gil Coury ◽  
Michael Kaufman ◽  
Amy J. Clarke
Keyword(s):  
Solid Solution ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening
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