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Title

Effect of heat input on the microstructure of AlCoCrFeNi high entropy alloy coating deposited using gas tungsten arc welding

Year: 1400
COI: INCWI22_133
Language: EnglishView: 77
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Authors

Nima Abbasian Vardin - MSc student, Sahand University of Technology, Iran
Tohid Saeid - Professor, Sahand University of Technology, Iran
Alireza Akbari - Professor, Sahand University of Technology, Iran

Abstract:

AlCoCrFeNi based high entropy alloy coatings were deposited on low carbon steel substrates using gas tungsten arc welding process in different heat inputs (two amperages of ۱۸۰ and ۲۱۰ A) and effects of heat input on the deposit microstructure was studied. The microstructural details were investigated by Optical Microscopy (OM), Field Emission Scanning Microscopy (FE-SEM) and X-ray Diffraction (XRD) analysis and microhardness testing. The result showed that the coating with the lowest heat input has petal dendritic morphology which includes two B۲ and A۲ face centered cubic structures and a Cr-rich strip-like structure in some parts of grain boundaries. By Increasing heat input a new Co-Cr rich phase appears besides the A۲ and B۲ phases. The morphology and amount of this phase are different in every area of the coating. The variations in microstructure and morphologies of the involved phases were explained based on the temperature gradient to growth rate ratio (G/R) and amount of the iron content. In all the coatings, the average hardness was higher than ۵۰۰ HV. Changes in heat input de not produce meaningful changes in the coating hardness.

Keywords:

AlCoCrFeNi high entropy alloy , Gas tungsten arc welding , Heat input , Microstructure.

Paper COI Code

This Paper COI Code is INCWI22_133. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1423808/

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If you want to refer to this Paper in your research work, you can simply use the following phrase in the resources section:
Abbasian Vardin, Nima and Saeid, Tohid and Akbari, Alireza,1400,Effect of heat input on the microstructure of AlCoCrFeNi high entropy alloy coating deposited using gas tungsten arc welding,4th International Conference on Welding and Non Destructive Testing & 22nd National Conference on Welding & Inspection & 11th National Conference on NDT,Isfahan,https://civilica.com/doc/1423808

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Type of center: دانشگاه دولتی
Paper count: 4,318
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