Results 61 to 70 of about 2,517,440 (244)

Microstructure and mechanical properties of Al-Co-Fe-Ni eutectic medium-entropy-alloys

Next Materials
The Al-Co-Fe-Ni eutectic medium-entropy-alloys (EMEAs) were designed to study its microstructure and mechanical properties. It was found that among these medium-entropy alloys, the AlCoFe1.5Ni2.0 alloy has the mixed eutectic structures of CoFeNi-type FCC
Wenxuan Li, Longtu Yang, Xilin Gan, Yong Dong   +3 more
doaj   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Effective and back stresses evolution upon cycling a high-entropy alloy

Materials Research Letters, 2022
We report on the effective and back stresses evolution of a CoCrFeMnNi high-entropy alloy (HEA) by partitioning its cyclic hysteresis loops. It was found that the cyclic stress response of the HEA predominantly originates from the back stress evolution ...
Kaiju Lu, Ankur Chauhan, Fabian Knöpfle, Jarir Aktaa   +3 more
doaj   +1 more source

Is There a Unique Physical Entropy? Micro versus Macro [PDF]

, 2012
Entropy in thermodynamics is an extensive quantity, whereas standard methods in statistical mechanics give rise to a non-extensive expression for the entropy. This discrepancy is often seen as a sign that basic formulas of statistical mechanics should be
Dieks, D.G.B.J., History and Foundations of Science, Dieks, Dennis, Sub Foundations&PhilosophyofNaturSc begr, Andersen, Hanne   +4 more
core   +1 more source

Rejuvenation as the origin of planar defects in the CrCoNi medium entropy alloy [PDF]

Nature Communications
AbstractHigh or medium- entropy alloys (HEAs/MEAs) are multi-principal element alloys with equal atomic elemental composition, some of which have shown record-breaking mechanical performance. However, the link between short-range order (SRO) and the exceptional mechanical properties of these alloys has remained elusive.
Yang Yang, Sheng Yin, Qin Yu, Yingxin Zhu, Jun Ding, Ruopeng Zhang, Colin Ophus, Mark Asta, Robert O. Ritchie, Andrew M. Minor   +9 more
openaire   +4 more sources

Mechanical Behavior of a Medium-Entropy Fe65(CoNi)25Cr9.5C0.5 Alloy Produced by Selective Laser Melting

, 2023
Specimens of a medium-entropy Fe65(CoNi)25Cr9.5C0.5 (in at.%) alloy were produced using additive manufacturing (selective laser melting, SLM). The selected parameters of SLM resulted in a very high density in the specimens with a residual porosity of ...
Klimova, М., Zherebtsov, S., Astakhov, I., Stepanov, N., Shaysultanov, D., Evlashin, S., Povolyaeva, E.   +6 more
core   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Martensitic transformation in CrCoNi medium-entropy alloy at cryogenic temperature

, 2021
We investigated the in situ deformation behavior of the CrCoNi medium-entropy alloy at a cryogenic temperature of 140 K and compared it with deformation at room temperature.
Lan, Si, Haiyan He, Kawasaki, Takuro, Stefanus Harjo, Wu, Zhenduo, Harjo, Stefanus, Yuntian Zhu, He, Haiyan, Zhou, Hao, Takuro Kawasaki, Naeem, Muhammad; id_orcid, Zhu, Yuntian, Hao Zhou, Si Lan, Xun-Li Wang, Wang, Xun-Li, Muhammad Naeem, Zhenduo Wu   +17 more
core   +1 more source

On the strength and fracture toughness of an additive manufactured CrCoNi medium-entropy alloy [PDF]

, 2023
An additively manufactured (nominally equiatomic) CrCoNi alloy was processed by laser powder bed fusion (LPBF). At ambient temperatures (298 K), this medium-entropy alloy displayed a yield strength, σ y of ∼691 ± 9 MPa, and an ...
Minor, Andrew M, Ritchie, Robert O, Pei Wang, Sheng, Huang, Huang Sheng, Michalek, Matthew, Zhang, Mingwei, Kwang B. Lau, Lau, Kwang B, Upadrasta Ramamurty, Andrew M. Minor, Cook, David H, Matthew Michalek, Robert O. Ritchie, Ramamurty, Upadrasta, Punit Kumar, Mingwei Zhang, Kumar, Punit, David H. Cook, Wang, Pei   +19 more
core   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source