scholarly journals Novel cost-effective Fe-based high entropy alloys with balanced strength and ductility

2019 ◽  
Vol 162 ◽  
pp. 24-33 ◽  
Author(s):  
Yu Yin ◽  
Jingqi Zhang ◽  
Qiyang Tan ◽  
Wyman Zhuang ◽  
Ning Mo ◽  
...  
Keyword(s):  
Cost Effective ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Strength And Ductility

scholarly journals Prediction of Strength and Ductility in Partially Recrystallized CoCrFeNiTi0.2 High-Entropy Alloy

Entropy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 389 ◽  
Author(s):  
Hanwen Zhang ◽  
Peizhi Liu ◽  
Jinxiong Hou ◽  
Junwei Qiao ◽  
Yucheng Wu
Keyword(s):  
Tensile Strength ◽  
Single Phase ◽  
Volume Fraction ◽  
Tensile Elongation ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
Number Density ◽  
High Entropy ◽  
Average Size ◽  
Strength And Ductility

The mechanical behavior of a partially recrystallized fcc-CoCrFeNiTi0.2 high entropy alloys (HEA) is investigated. Temporal evolutions of the morphology, size, and volume fraction of the nanoscaled L12-(Ni,Co)3Ti precipitates at 800 °C with various aging time were quantitatively evaluated. The ultimate tensile strength can be greatly improved to ~1200 MPa, accompanied with a tensile elongation of ~20% after precipitation. The temporal exponents for the average size and number density of precipitates reasonably conform the predictions by the PV model. A composite model was proposed to describe the plastic strain of the current HEA. As a consequence, the tensile strength and tensile elongation are well predicted, which is in accord with the experimental results. The present experiment provides a theoretical reference for the strengthening of partially recrystallized single-phase HEAs in the future.

scholarly journals Achieving high strength and ductility in nitrogen-doped refractory high-entropy alloys

2021 ◽  
pp. 110356
Author(s):  
Ruixin Wang ◽  
Yu Tang ◽  
Zhifeng Lei ◽  
Yuanlin Ai ◽  
Zhixing Tong ◽  
...  
Keyword(s):  
High Strength ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Nitrogen Doped ◽  
Strength And Ductility

scholarly journals Metalloid substitution elevates simultaneously the strength and ductility of face-centered-cubic high-entropy alloys

2021 ◽  
pp. 117571
Author(s):  
Daixiu Wei ◽  
Liqiang Wang ◽  
Yongjie Zhang ◽  
Wu Gong ◽  
Tomohito Tsuru ◽  
...  
Keyword(s):  
High Entropy Alloys ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Face Centered ◽  
Strength And Ductility

Lightweight Zr1.2V0.8NbTi Al high-entropy alloys with high tensile strength and ductility

2021 ◽  
pp. 141234
Author(s):  
Liang Wang ◽  
Songshen Chen ◽  
Bolun li ◽  
Tangqing Cao ◽  
Benpeng Wang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
High Entropy Alloys ◽  
High Tensile Strength ◽  
High Entropy ◽  
Strength And Ductility

scholarly journals Directly cast bulk eutectic and near-eutectic high entropy alloys with balanced strength and ductility in a wide temperature range

2017 ◽  
Vol 124 ◽  
pp. 143-150 ◽  
Author(s):  
Yiping Lu ◽  
Xuzhou Gao ◽  
Li Jiang ◽  
Zongning Chen ◽  
Tongmin Wang ◽  
...  
Keyword(s):  
Wide Temperature Range ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Temperature Range ◽  
Strength And Ductility

Synergetic effect of Si addition on mechanical properties in face-centered-cubic high entropy alloys: A first-principles study

2021 ◽  
Author(s):  
T Tsuru ◽  
Ivan Lobzenko ◽  
Daixiu Wei
Keyword(s):  
Mechanical Properties ◽  
First Principles ◽  
Stacking Fault ◽  
High Entropy Alloys ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Si Doped ◽  
Face Centered ◽  
Si Addition ◽  
Strength And Ductility

Abstract High-entropy alloys (HEA) have been receiving increased attention for their excellent mechanical properties. Our recent study revealed that Si-doped face-centered cubic (FCC) HEAs have great potential to improve both strength and ductility. Here, we carried out first-principles calculations in cooperation with Monte Carlo simulation and structural factor analysis to explore the effect of Si addition on the macroscopic mechanical properties. As a result, Si addition increased the local lattice distortion and the stacking fault energy. Furthermore, the short-range order formation in Si-doped alloy caused highly fluctuated stacking fault energy. Thus, the heterogeneous solid solution states in which low and high stacking fault regions are distributed into the matrix were nucleated. This unique feature in Si-doped FCC-HEA induces ultrafine twin formation in Si-doped alloys, which can be a dominant factor in improving both strength and ductility.

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