Improving fatigue durability of SLM Ti-6Al-4V parts by combined ultrasonic impact-electrophysical treatment

A. V. Eremin, A. V. Byakov, S. V. Panin, Yu I. Pochivalov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper deals with the study of fatigue durability of SLM Ti-6Al-4V specimens after post-build combined Ultrasonic Impact- EelectroPhysical Treatment (UIEPT). It is shown that the highest fatigue performance was characteristic for SLM Ti-6Al-4V specimens treated by the mode 1 (with lower pulse frequency and duration). It was revealed that the conducted combined ultrasonic impact - electrophysical treatment slightly changed the internal structure and microhardness. The modification mostly took place in the surface layers while but the straing and pulsed electric current exposure together gave rise to certain heating as well as variation of bulk material properties. It is suggested that the post-build treatment by the selected rational parameters due to favorable combination of mechanical and electro- physical impacts made it possible to reduce residual stresses. It was shown that the post-build treatment at higher values of electric current pulse frequency and duration did not provide efficient increase of fatigue durability. It suggests that increased energy input during the post-build treatment increased the brittleness and induced excess defects and stresses.

Original languageEnglish
Title of host publicationOil and Gas Engineering, OGE 2020
EditorsAlexander V. Myshlyavtsev, Vladimir A. Likholobov, Vladimir L. Yusha
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735440159
DOIs
Publication statusPublished - 16 Nov 2020
Event2020 Oil and Gas Engineering Conference, OGE 2020 - Omsk, Russian Federation
Duration: 26 Feb 202029 Feb 2020

Publication series

NameAIP Conference Proceedings
Volume2285
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2020 Oil and Gas Engineering Conference, OGE 2020
CountryRussian Federation
CityOmsk
Period26.2.2029.2.20

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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