Mechanical Properties and Phase Stability of WTaMoNbTi Refractory High-Entropy Alloy at Elevated Temperatures

2021 ◽  
Author(s):  
Yixing Wan ◽  
Jinyong Mo ◽  
Xin Wang ◽  
Zhibin Zhang ◽  
Baolong Shen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Stability ◽  
Elevated Temperatures ◽  
High Entropy Alloy ◽  
High Entropy

Experimental and theoretical investigations on the phase stability and mechanical properties of Cr7Mn25Co9Ni23Cu36 high-entropy alloy

2021 ◽  
Vol 208 ◽  
pp. 116763
Author(s):  
Gang Qin ◽  
Ruirun Chen ◽  
Huahai Mao ◽  
Yan Yan ◽  
Xiaojie Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Stability ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Theoretical Investigations

scholarly journals A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures

2020 ◽  
Vol 8 (10) ◽  
pp. 373-382 ◽  
Author(s):  
Liuliu Han ◽  
Xiandong Xu ◽  
Zhiming Li ◽  
Bin Liu ◽  
C. T. Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperatures ◽  
High Entropy Alloy ◽  
High Entropy

Non-equiatomic W10Mo27Cr21Ti22Al20 high-entropy alloy produced by mechanical alloying and spark plasma sintering: Phase evolution and mechanical properties

2022 ◽  
pp. 146442072110510
Author(s):  
Hamed Naser-Zoshki ◽  
Ali-Reza Kiani-Rashid ◽  
Jalil Vahdati-Khaki
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
Elevated Temperatures ◽  
High Entropy Alloy ◽  
Solid Solution Phase ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma

In this work, non-equiatomic W10Mo27Cr21Ti22Al20 refractory high-entropy alloy (RHEA) was produced using mechanical alloying followed by spark plasma sintering. The phase formation, microstructure, and compressive mechanical properties of the alloy were studied. During mechanical alloying, a Body-centered cubic (BCC) solid solution phase with a particle size of less than 1 µm was obtained after 18 h ball milling. The microstructure of the sintered sample exhibits three distinct phases consisting of two solid solution phases BCC1 and BCC2 as well as fine TiCxOy precipitates distributed in them. The volume fractions of each phase were about 79%, 8%, and 13%, respectively. The sintered W10Mo27Cr21Ti22Al20 showed yield strengths of 2465, 1506, 405, and 290 MPa at room temperature 600, 1000, and 1200°C, respectively, which are about twice that of the same refractory high-entropy alloy produced by vacuum arc melting. At 1000 and 1200°C, the strength after yielding gradually increased to 970 and 718 MPa at a compressive strain of 60%. The studied refractory high-entropy alloy can have good potential in high-temperature applications due to its high specific strength at elevated temperatures compared to conventional Ni-based superalloys and most as-reported refractory high-entropy alloys.

Composition Dependence of Phase Stability, Deformation Mechanisms, and Mechanical Properties of the CoCrFeMnNi High-Entropy Alloy System

JOM ◽  
2014 ◽  
Vol 66 (10) ◽  
pp. 1993-2001 ◽  
Author(s):  
C. C. Tasan ◽  
Y. Deng ◽  
K. G. Pradeep ◽  
M. J. Yao ◽  
H. Springer ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Stability ◽  
Composition Dependence ◽  
Alloy System ◽  
Deformation Mechanisms ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Microstructure and Mechanical Properties of Precipitate Strengthened High Entropy Alloy Al10Co25Cr8Fe15Ni36Ti6 with Additions of Hafnium and Molybdenum

Entropy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 169 ◽  
Author(s):  
Sebastian Haas ◽  
Anna M. Manzoni ◽  
Fabian Krieg ◽  
Uwe Glatzel
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
Tensile Tests ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Positive Effects ◽  
High Temperature Materials ◽  
Equiatomic Alloy

High entropy or compositionally complex alloys provide opportunities for optimization towards new high-temperature materials. Improvements in the equiatomic alloy Al17Co17Cr17Cu17Fe17Ni17 (at.%) led to the base alloy for this work with the chemical composition Al10Co25Cr8Fe15Ni36Ti6 (at.%). Characterization of the beneficial particle-strengthened microstructure by scanning electron microscopy (SEM) and observation of good mechanical properties at elevated temperatures arose the need of accomplishing further optimization steps. For this purpose, the refractory metals hafnium and molybdenum were added in small amounts (0.5 and 1.0 at.% respectively) because of their well-known positive effects on mechanical properties of Ni-based superalloys. By correlation of microstructural examinations using SEM with tensile tests in the temperature range of room temperature up to 900 °C, conclusions could be drawn for further optimization steps.

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