The effect of advanced ultrasonic forging on fatigue fracture mechanisms of welded Ti-6A1-4V alloy

A. Smirnova, Yu Pochivalov, V. Panin, S. Panin, A. Eremin, A. Gorbunov

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

1 Citation (Scopus)

Abstract

The current study is devoted to application of advanced postwelding ultrasonic forging to joints formed by laser welding of Ti-6A1-4V alloy in order to enhance their mechanical properties and fatigue durability. Low cycle fatigue tests were performed via digital image correlation technique used to obtain strain fields and in situ characterization of deformation, crack growth and fracture. Fracture surfaces were studied by SEM analysis accompanied with calculation of fracture patterns percentage. The fatigue tests demonstrate the high increase in the number of cycles until fracture (from 17 000 to 32 000 cycles) which could be explained by high ductility of welded material after treatment. This leads to lower fatigue crack growth rate due to higher energy dissipation. The obtained effect is attributable only for small cracks on micro-/mesoscales and fails to play a significant role for macro cracks.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017
PublisherAmerican Institute of Physics Inc.
Volume1909
ISBN (Electronic)9780735416017
DOIs
Publication statusPublished - 1 Dec 2017
EventInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017 - Tomsk, Russian Federation
Duration: 9 Oct 201713 Oct 2017

Conference

ConferenceInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017
CountryRussian Federation
CityTomsk
Period9.10.1713.10.17

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Smirnova, A., Pochivalov, Y., Panin, V., Panin, S., Eremin, A., & Gorbunov, A. (2017). The effect of advanced ultrasonic forging on fatigue fracture mechanisms of welded Ti-6A1-4V alloy. In Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017 (Vol. 1909). [020206] American Institute of Physics Inc.. https://doi.org/10.1063/1.5013887