Microstructure, mechanical property and Hall-Petch relationship of a light-weight refractory Al0.1CrNbVMo high entropy alloy fabricated by powder metallurgical process

2018 ◽  
Vol 767 ◽  
pp. 1012-1021 ◽  
Author(s):  
Byungchul Kang ◽  
Junho Lee ◽  
Ho Jin Ryu ◽  
Soon Hyung Hong
Keyword(s):  
Mechanical Property ◽  
High Entropy Alloy ◽  
Light Weight ◽  
Metallurgical Process ◽  
High Entropy ◽  
Petch Relationship ◽  
Powder Metallurgical Process ◽  
Relationship Of

scholarly journals A Novel Non-Equiatomic (W35Ta35Mo15Nb15)95Ni5 Refractory High Entropy Alloy with High Density Fabricated by Powder Metallurgical Process

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1436
Author(s):  
Bohua Duan ◽  
Yingrui Yu ◽  
Xinli Liu ◽  
Dezhi Wang ◽  
Zhuangzhi Wu
Keyword(s):  
Mechanical Alloying ◽  
Fracture Strain ◽  
Oxide Inclusion ◽  
High Density ◽  
High Entropy Alloy ◽  
Metallurgical Process ◽  
High Entropy ◽  
Powder Metallurgical Process ◽  
Plasma Sintering ◽  
Spark Plasma

A non-equiatomic refractory high entropy alloy (RHEA), (W35Ta35Mo15Nb15)95Ni5 with high density of 14.55 g/cm3 was fabricated by powder metallurgical process of mechanical alloying (MA) and spark plasma sintering (SPS). The mechanical alloying behavior of the metallic powders was studied systematically, and the microstructure and phase composition for both the powders and alloys were analyzed. Results show that the crystal consists of the primary solid solution and marginal oxide inclusion (Nb5.7Ni4Ta2.3O2). In addition, the maximum strength, yield strength and fracture strain are, 2562 MPa, 2128 MPa, 8.16%, respectively.

Microstructure development and mechanical performance of Al2CrFeMnTi light-weight high entropy alloy

2021 ◽  
Vol 139 ◽  
pp. 107376
Author(s):  
Hadi Jahangiri ◽  
Samira Mohagheghi ◽  
Armin Asghari Alamdari ◽  
Rifat Yilmaz ◽  
Kübra Gürcan Bayrak ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
High Entropy Alloy ◽  
Light Weight ◽  
Microstructure Development ◽  
High Entropy

scholarly journals Phase stability and transformation in a light-weight high-entropy alloy

2018 ◽  
Vol 146 ◽  
pp. 280-293 ◽  
Author(s):  
Rui Feng ◽  
Michael C. Gao ◽  
Chuan Zhang ◽  
Wei Guo ◽  
Jonathan D. Poplawsky ◽  
...  
Keyword(s):  
Phase Stability ◽  
High Entropy Alloy ◽  
Light Weight ◽  
High Entropy

Microstructural Evolution in MgAlLiZnCaY and MgAlLiZnCaCu Multicomponent High Entropy Alloys

2018 ◽  
Vol 928 ◽  
pp. 183-187 ◽  
Author(s):  
Khin Sandar Tun ◽  
Manoj Gupta
Keyword(s):  
Microstructural Evolution ◽  
Microstructural Development ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
Light Weight ◽  
Aluminum Casting ◽  
High Entropy ◽  
Characterization Studies ◽  
Melt Deposition ◽  
Constituent Elements

In this research study, two light weight multi-component high entropy alloys (HEAs) consisting of six constituent elements were synthesized. The high entropy alloy having a chemical composition of Mg35Al33Li15Zn7Ca5Y5(atomic pct.) had a density of 2.25 g/cm3, while the high entropy alloy having a composition of Mg35Al33Li15Zn7Ca5Cu5(atomic pct.) had a density of 2.27 g/cm3. The strategy of non-equiatomic composition, high entropy of mixing coupled with low density was applied in designing the alloy systems. Disintegrated melt deposition (DMD) technique was used to synthesize the materials and characterization studies were performed on as-cast materials. The present study emphasizes on examining and understanding the microstructural development in the two light weight high entropy alloys. The formation and presence of phases and microstructural evolution were studied by interchanging yttrium and copper. Microstructural observations revealed presence of multiple phases in the developed alloys and the simplification of the microstructure when copper is used instead of yttrium. Microhardness results revealed a significant increase in hardness of of both the HEAs (3.8 – 4.2 times) when compared to AZ31 commercial magnesium alloy.Keywords: High Entropy Alloy, Magnesium, Aluminum, Casting, Microstructure

scholarly journals Microstructure and Mechanical Property Evolution during Annealing of a Cold-Rolled Metastable Powder Metallurgy High Entropy Alloy

Entropy ◽  
2019 ◽  
Vol 21 (9) ◽  
pp. 833 ◽  
Author(s):  
Li ◽  
Qiu ◽  
Guo ◽  
Liu ◽  
Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Tensile Strength ◽  
Powder Metallurgy ◽  
Cold Deformation ◽  
Precipitation Strengthening ◽  
High Entropy Alloy ◽  
Σ Phase ◽  
High Entropy ◽  
Fine Grain

Precipitation strengthening is an effective approach to strengthen high-entropy alloys (HEAs) with a simple face-center-cubic (FCC) structure. In this work, CoCrFeNiMo0.2 HEAs were prepared by powder metallurgy, followed by cool rolling and subsequent heat-treatment at different temperatures. The effects of cold working and annealing on microstructure and mechanical properties have been investigated. Results show the fine and dispersed (Cr, Mo)-rich σ phase with a topologically close-packed structure precipitated in the FCC matrix after the prior cold deformation process, which enhanced the mechanical property of the CoCrFeNiMo0.2 alloy. The HEA annealed at 600 °C for 48 h had a tensile strength of 1.9 GPa but an elongation which decreased to 8%. The HEA annealed at 800 °C for 12 h exhibited a tensile strength of 1.2 GPa and an elongation of 31%. These outstanding mechanical properties can be attributed to precipitation strengthening and fine-grain strengthening.

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