scholarly journals Impact of interstitial C on phase stability and stacking-fault energy of the CrMnFeCoNi high-entropy alloy

2019 ◽  
Vol 3 (11) ◽  
Author(s):  
Yuji Ikeda ◽  
Isao Tanaka ◽  
Jörg Neugebauer ◽  
Fritz Körmann
Keyword(s):  
Phase Stability ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloy ◽  
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.

Temperature dependent stacking fault energy of FeCrCoNiMn high entropy alloy

2015 ◽  
Vol 108 ◽  
pp. 44-47 ◽  
Author(s):  
Shuo Huang ◽  
Wei Li ◽  
Song Lu ◽  
Fuyang Tian ◽  
Jiang Shen ◽  
...  
Keyword(s):  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloy ◽  
Temperature Dependent ◽  
High Entropy

scholarly journals Impact of N on the Stacking Fault Energy and Phase Stability of FCC CrMnFeCoNi: An Ab Initio Study

2021 ◽  
Author(s):  
Yuji Ikeda ◽  
Fritz Körmann
Keyword(s):  
Ab Initio ◽  
Phase Stability ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Solid Solution Hardening ◽  
Clear Correlation ◽  
High Entropy ◽  
Local Environments ◽  
Fcc Phase ◽  
The Impact

AbstractInterstitial alloying has become an important pillar in tuning and improving the materials properties of high-entropy alloys, e.g., enabling interstitial solid-solution hardening and for tuning the stacking fault energies. In this work we performed ab initio calculations to evaluate the impact of interstitial alloying with nitrogen on the fcc–hcp phase stability for the prototypical CrMnFeCoNi alloy. The N solution energies are broadly distributed and reveal a clear correlation with the local environments. We show that N addition stabilizes the fcc phase of CrMnFeCoNi and increases the stacking fault energy.

Deformation twinning behaviors of the low stacking fault energy high-entropy alloy: An in-situ TEM study

2017 ◽  
Vol 137 ◽  
pp. 9-12 ◽  
Author(s):  
Jiabin Liu ◽  
Chenxu Chen ◽  
Yuqing Xu ◽  
Shiwei Wu ◽  
Gang Wang ◽  
...  
Keyword(s):  
Deformation Twinning ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloy ◽  
In Situ Tem ◽  
High Entropy

scholarly journals Effects of rotational speed on the Al0.3CoCrCu0.3FeNi high-entropy alloy by friction stir welding

2020 ◽  
Vol 39 (1) ◽  
pp. 556-566 ◽  
Author(s):  
Po-Ting Lin ◽  
Chan-Sheng Wu ◽  
Chun-Hao Peng ◽  
Che-Wei Tsai ◽  
Yutaka S. Sato
Keyword(s):  
Friction Stir Welding ◽  
Cubic Boron Nitride ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Entropy Alloy ◽  
Electron Backscattered Diffraction ◽  
High Entropy ◽  
Practical Applications ◽  
Friction Stir ◽  
Microhardness Distribution

AbstractWelding and relevant studies are indispensable to employ high-entropy alloys for practical applications. In this study, Al0.3CoCrCu0.3FeNi high-entropy alloy with single FCC phase was used to make “bead-on-plate” friction stir welds at different rotational speeds, and the effects on microstructure and mechanical properties were studied. Several banded structures containing oxide or nitride particles were observed in the stir zone (SZ), and the chemical wear of the polycrystalline cubic boron nitride tool was confirmed. The microhardness distribution of the welds showed higher hardness in the SZ because of grain refinement and the presence of deformed grains. The electron backscattered diffraction results suggested that the high-entropy alloy with low stacking-fault energy experienced recrystallization during friction stir welding, which was similar to other conventional materials with low stacking-fault energy.

Phase Stability and Microstructural Evolution in a Ductile Refractory High Entropy Alloy Al 10Nb 15Ta 5Ti 30Zr 40

2019 ◽  
Author(s):  
V. Soni ◽  
Oleg N. Senkov, PhD ◽  
Jean-Philippe Couzinie, PhD ◽  
Yufeng Zheng, PhD ◽  
Bharat Gwalani, PhD ◽  
...  
Keyword(s):  
Microstructural Evolution ◽  
Phase Stability ◽  
High Entropy Alloy ◽  
High Entropy
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