A role of atomic size misfit in lattice distortion and solid solution strengthening of TiNbHfTaZr high entropy alloy system

2022 ◽  
Vol 210 ◽  
pp. 114470
Author(s):  
Pramote Thirathipviwat ◽  
Shigeo Sato ◽  
Gian Song ◽  
Jozef Bednarcik ◽  
Kornelius Nielsch ◽  
...  
Keyword(s):  
Solid Solution ◽  
Lattice Distortion ◽  
Alloy System ◽  
High Entropy Alloy ◽  
Atomic Size ◽  
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 Atomic displacement in the CrMnFeCoNi high-entropy alloy – A scaling factor to predict solid solution strengthening

AIP Advances ◽  
2016 ◽  
Vol 6 (12) ◽  
pp. 125008 ◽  
Author(s):  
Norihiko L. Okamoto ◽  
Koretaka Yuge ◽  
Katsushi Tanaka ◽  
Haruyuki Inui ◽  
Easo P. George
Keyword(s):  
Solid Solution ◽  
Atomic Displacement ◽  
Scaling Factor ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

scholarly journals The Effect of Aluminium Addition on Solid Solution Strengthening in CoCrFeMnNi High Entropy Alloy: Experiment and Modelling

2020 ◽  
Author(s):  
Jitesh Kumar ◽  
Nilesh P Gurao ◽  
Krishanu Biswas
Keyword(s):  
Solid Solution ◽  
Constitutive Modeling ◽  
High Entropy Alloy ◽  
Aluminium Content ◽  
Local Lattice Distortion ◽  
Continuous Increase ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Aluminium Addition ◽  
Solution Strengthening

<p>The effect of aluminium addition to the Cantor alloy in the composition regime of 0.25-5 atomic percent on solid solution strengthening of single phase HEA was investigated using experiments and constitutive modeling. The continuous increase in yield and tensile strength without significant change in ductility is observed for the alloys characterized by almost similar grain sizes (~100 μm) with increasing aluminium content. The constitute modeling of the strengthening has been performed using traditional as well as recently developed models for solid solution strengthening. The constitutive modeling indicated significant contribution of solid solution strengthening due to addition of Al having relatively larger size (̴12%) than the size of elements in the Cantor alloy leading to severe local lattice distortion. The experimental yield strength could be best explained on the basis of large apparent distortion volume of Al atom acting as a stronger barrier to dislocation motion based on the Varvenne model. </p>

scholarly journals Temperature Dependent Solid Solution Strengthening in the High Entropy Alloy CrMnFeCoNi in Single Crystalline State

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1412
Author(s):  
Christian Gadelmeier ◽  
Sebastian Haas ◽  
Tim Lienig ◽  
Anna Manzoni ◽  
Michael Feuerbacher ◽  
...  
Keyword(s):  
Solid Solution ◽  
Pure Nickel ◽  
High Entropy Alloy ◽  
Single Element ◽  
Strengthening Effect ◽  
Face Centered Cubic ◽  
Single Crystalline ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

The main difference between high entropy alloys and conventional alloys is the solid solution strengthening effect, which shifts from a single element to a multi-element matrix. Little is known about the effectiveness of this effect at high temperatures. Face-centered cubic, equiatomic, and single crystalline high entropy alloy CrMnFeCoNi was pre-alloyed by arc-melting and cast as a single crystal using the Bridgman process. Mechanical characterization by creep testing were performed at temperatures of 700, 980, 1100, and 1200 °C at different loads under vacuum and compared to single-crystalline pure nickel. The results allow a direct assessment of the influence of the chemical composition without any disturbance by grain boundary sliding or diffusion. The results indicate different behaviors of single crystalline pure nickel and CrMnFeCoNi. At 700 °C CrMnFeCoNi is more creep-resistant than Ni, but at 980 °C both alloys show a nearly similar creep strength. Above 980 °C the creep behavior is identical and the solid solution strengthening effect of the CrMnFeCoNi alloy disappears.

Interplay between single phase solid solution strengthening and multi-phase strengthening in the same high entropy alloy

2020 ◽  
Vol 771 ◽  
pp. 138620 ◽  
Author(s):  
B. Gwalani ◽  
D. Choudhuri ◽  
Kaimiao Liu ◽  
J.T. Lloyd ◽  
R.S. Mishra ◽  
...  
Keyword(s):  
Solid Solution ◽  
Single Phase ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Multi Phase

scholarly journals Contribution of Lattice Distortion to Solid Solution Strengthening in a Series of Refractory High Entropy Alloys

2017 ◽  
Vol 49 (3) ◽  
pp. 772-781 ◽  
Author(s):  
H. Chen ◽  
A. Kauffmann ◽  
S. Laube ◽  
I.-C. Choi ◽  
R. Schwaiger ◽  
...  
Keyword(s):  
Solid Solution ◽  
Lattice Distortion ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

scholarly journals The Effect of Aluminium Addition on Solid Solution Strengthening in CoCrFeMnNi High Entropy Alloy: Experiment and Modelling

2020 ◽  
Author(s):  
Jitesh Kumar ◽  
Nilesh P Gurao ◽  
Krishanu Biswas
Keyword(s):  
Solid Solution ◽  
Constitutive Modeling ◽  
High Entropy Alloy ◽  
Aluminium Content ◽  
Local Lattice Distortion ◽  
Continuous Increase ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Aluminium Addition ◽  
Solution Strengthening

<p>The effect of aluminium addition to the Cantor alloy in the composition regime of 0.25-5 atomic percent on solid solution strengthening of single phase HEA was investigated using experiments and constitutive modeling. The continuous increase in yield and tensile strength without significant change in ductility is observed for the alloys characterized by almost similar grain sizes (~100 μm) with increasing aluminium content. The constitute modeling of the strengthening has been performed using traditional as well as recently developed models for solid solution strengthening. The constitutive modeling indicated significant contribution of solid solution strengthening due to addition of Al having relatively larger size (̴12%) than the size of elements in the Cantor alloy leading to severe local lattice distortion. The experimental yield strength could be best explained on the basis of large apparent distortion volume of Al atom acting as a stronger barrier to dislocation motion based on the Varvenne model. </p>

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