Fracture behavior of high-entropy alloy coating by in-situ TEM tensile testing

2017 ◽  
Vol 729 ◽  
pp. 897-902 ◽  
Author(s):  
Zhaobing Cai ◽  
Xiufang Cui ◽  
Erbao Liu ◽  
Yang Li ◽  
Meiling Dong ◽  
...  
Keyword(s):  
Tensile Testing ◽  
Fracture Behavior ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
In Situ Tem ◽  
High Entropy

In situ TEM tensile testing on high-entropy alloy coating by laser surface alloying

2017 ◽  
Vol 708 ◽  
pp. 380-384 ◽  
Author(s):  
Zhaobing Cai ◽  
Xiufang Cui ◽  
Guo Jin ◽  
Binwen Lu ◽  
Danli Zhang ◽  
...  
Keyword(s):  
Tensile Testing ◽  
Alloy Coating ◽  
Laser Surface ◽  
High Entropy Alloy ◽  
In Situ Tem ◽  
Surface Alloying ◽  
Laser Surface Alloying ◽  
High Entropy

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 Transformations in CrFeCoNiCu High Entropy Alloy Thin Films during In-Situ Annealing in TEM

Coatings ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 60 ◽  
Author(s):  
Mohamed Arfaoui ◽  
György Radnóczi ◽  
Viktória Kovács Kis
Keyword(s):  
Thin Films ◽  
Structural Changes ◽  
Diffusion Processes ◽  
Intermetallic Phase ◽  
High Resolution Electron Microscopy ◽  
Phase Changes ◽  
High Entropy Alloy ◽  
In Situ Tem ◽  
High Entropy

In-situ TEM-heating study of the microstructural evolution of CrFeCoNiCu high entropy alloy (HEA) thin films was carried out and morphological and phase changes were recorded. Post annealing investigation of the samples was carried out by high resolution electron microscopy and EDS measurements. The film is structurally and morphologically stable single phase FCC HEA up to 400 °C. At 450 °C the formation of a BCC phase was observed, however, the morphology of the film remained unchanged. This type of transformation is attributed to diffusionless processes (martensitic or massive). From 550 °C fast morphological and structural changes occur, controlled by volume diffusion processes. Fast growing of a new intermetallic phase is observed which contains mainly Cr and has large unit cell due to chemical ordering of components in <100> direction. The surface of the films gets covered with a CrO-type layer, possibly contributing to corrosion resistance of these.

In Situ Laser Synthesis of High Entropy Alloy Coating on Ti-6Al-4V Alloy: Characterization of Microstructure and Properties

2017 ◽  
Vol 898 ◽  
pp. 643-650 ◽  
Author(s):  
Zhao Bing Cai ◽  
Xue Jia Pang ◽  
Xiu Fang Cui ◽  
Xin Wen ◽  
Zhe Liu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Room Temperature ◽  
Adhesive Wear ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Micro Hardness ◽  
High Entropy

In order to improve the surface properties of Ti-6Al-4V, high-entropy alloy coatings were prepared by in-situ laser cladding on the surface of Ti-6Al-4V substrate. The microstructure, micro-hardness, corrosion resistance and wear resistance were investigated. The results showed that the high-entropy alloy coating was composed of BCC high-entropy alloy phase, α-Ti phase and (Ni, Co)Ti2 phase. The micro-hardness of the high-entropy alloy coatings is much higher than that of Ti-6Al-4V substrate. The coating also has a better corrosion resistance than Ti-6Al-4V substrate, even superior to 304SS in 3.5wt.% NaCl solution at room temperature. Compared with Ti-6Al-4V substrate, the high-entropy alloy coating has a greater wear resistance with the wear mass loss decreased 28.2% and 23.1%, respectively. Wear patterns of Ti-6Al-4V substrate and high-entropy alloy coatings are the coexistence of adhesive wear and abrasive wear, but the wear degree of high-entropy alloy coatings is lower.

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