THE EFFECT OF ELECTRON-BEAM TREATMENT ON THE DEFORMATION BEHAVIOR OF THE EBAM TI-6AL-4V UNDER SCRATCHING

Artur R. Shugurov, Anton Y. Nikonov, Andrey I. Dmitriev

DOI Number
https://doi.org/10.22190/FUME211110001S
First page
307
Last page
319

Abstract


The effect of the continuous electron beam scanning (CEBS) post-treatment on the microstructure, mechanical properties and scratching behavior of the Ti-6Al-4V alloy samples produced by electron beam additive manufacturing was studied experimentally and by using molecular dynamics simulation. It was found that the CEBS post-treatment resulted in the transformation of the microstructure of the samples from the α′-martensite into the α+β structure. The evolution of the sample microstructure was shown to provide improved mechanical characteristics as well as enhanced deformation recovery after scratching. A mechanism was proposed based on the results of molecular dynamics simulation, which attributed to the improved recovery of the scratch groves after passing the indenter to reversible β→α→β phase transformations, which occurred in the vanadium alloyed Ti crystallites.


Keywords

Ti-6Al-4V Alloy, Electron Beam Additive Manufacturing, Scratch Testing, Molecular Dynamics, Microstructure, Phase Transformations

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References


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DOI: https://doi.org/10.22190/FUME211110001S

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