Effect of stacking fault energy on deformation mechanism in single crystals of high-entropy alloys

2018 ◽  
pp. 59-62
Author(s):  
Anna Vyacheslavovna Vyrodova ◽  
◽  
Zinaida Vladimirovna Pobedennaya ◽  
Irina Vasilevna Kireeva ◽  
Yuriy Ivanovich Chumlyakov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Deformation Mechanism ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Generalized Stacking Fault Energy of Al-Doped CrMnFeCoNi High-Entropy Alloy

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 59 ◽  
Author(s):  
Xun Sun ◽  
Hualei Zhang ◽  
Wei Li ◽  
Xiangdong Ding ◽  
Yunzhi Wang ◽  
...  
Keyword(s):  
Interfacial Energy ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Al Content ◽  
Generalized Stacking Fault ◽  
Generalized Stacking Fault Energy

Using first-principles methods, we investigate the effect of Al on the generalized stacking fault energy of face-centered cubic (fcc) CrMnFeCoNi high-entropy alloy as a function of temperature. Upon Al addition or temperature increase, the intrinsic and extrinsic stacking fault energies increase, whereas the unstable stacking fault and unstable twinning fault energies decrease monotonously. The thermodynamic expression for the intrinsic stacking fault energy in combination with the theoretical Gibbs energy difference between the hexagonal close packed (hcp) and fcc lattices allows one to determine the so-called hcp-fcc interfacial energy. The results show that the interfacial energy is small and only weakly dependent on temperature and Al content. Two parameters are adopted to measure the nano-twinning ability of the present high-entropy alloys (HEAs). Both measures indicate that the twinability decreases with increasing temperature or Al content. The present study provides systematic theoretical plasticity parameters for modeling and designing high entropy alloys with specific mechanical properties.

Effects of stacking fault energy on the deformation behavior of CoNiCrFeMn high-entropy alloys: A molecular dynamics study

2021 ◽  
Vol 119 (20) ◽  
pp. 201907
Author(s):  
Tengfei Zheng ◽  
Jiecheng Lv ◽  
Yuan Wu ◽  
Hong-Hui Wu ◽  
Shaofei Liu ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Deformation Behavior ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloys ◽  
High Entropy

Stacking fault energy of face-centered-cubic high entropy alloys

2018 ◽  
Vol 93 ◽  
pp. 269-273 ◽  
Author(s):  
S.F. Liu ◽  
Y. Wu ◽  
H.T. Wang ◽  
J.Y. He ◽  
J.B. Liu ◽  
...  
Keyword(s):  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloys ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Face Centered

Solid solubility, precipitates, and stacking fault energy of micro-alloyed CoCrFeNi high entropy alloys

2018 ◽  
Vol 769 ◽  
pp. 490-502 ◽  
Author(s):  
Feng He ◽  
Zhijun Wang ◽  
Bin Han ◽  
Qingfeng Wu ◽  
Da Chen ◽  
...  
Keyword(s):  
Solid Solubility ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Towards Stacking Fault Energy Engineering in FCC High Entropy Alloys

2021 ◽  
pp. 117472
Author(s):  
T. Khan ◽  
T. Kirk ◽  
G. Vazquez ◽  
P. Singh ◽  
A.V. Smirnov ◽  
...  
Keyword(s):  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Energy Engineering

scholarly journals Effect of Stacking Fault Energy on Microstructure and Texture Evolution during the Rolling of Non-Equiatomic CrMnFeCoNi High-Entropy Alloys

Crystals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 607
Author(s):  
G. Dan Sathiaraj ◽  
Rajib Kalsar ◽  
Satyam Suwas ◽  
Werner Skrotzki
Keyword(s):  
Cryogenic Temperature ◽  
Texture Evolution ◽  
Shear Banding ◽  
Mechanical Twinning ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Dislocation Slip ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Evolution Of Microstructure

The evolution of microstructure and texture in three non-equiatomic CrMnFeCoNi high-entropy alloys (HEAs) with varying stacking fault energy (SFE) has been studied in up to 90% rolling reductions at both room and cryogenic temperature. All the HEAs deform by dislocation slip and additional mechanical twinning at intermediate and shear banding at high rolling strains. The microstructure is quite heterogeneous and, with strain, becomes highly fragmented. During rolling, a characteristic brass-type texture develops. Its strength increases with a decreasing SFE and the lowering of the rolling temperature. The texture evolution is discussed with regard to planar slip, mechanical twinning, and shear banding.

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