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

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 language	English
Title of host publication	Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017
Publisher	American Institute of Physics Inc.
Volume	1909
ISBN (Electronic)	9780735416017
DOIs	https://doi.org/10.1063/1.5013887
Publication status	Published - 1 Dec 2017
Event	International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017 - Tomsk, Russian Federation Duration: 9 Oct 2017 → 13 Oct 2017

Conference

Conference	International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017
Country	Russian Federation
City	Tomsk
Period	9.10.17 → 13.10.17

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.5013887

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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

The effect of advanced ultrasonic forging on fatigue fracture mechanisms of welded Ti-6A1-4V alloy. / Smirnova, A.; Pochivalov, Yu; Panin, V.; Panin, S.; Eremin, A.; Gorbunov, A.

Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017. Vol. 1909 American Institute of Physics Inc., 2017. 020206.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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., International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017, Tomsk, Russian Federation, 9.10.17. https://doi.org/10.1063/1.5013887

Smirnova A, Pochivalov Y, Panin V, Panin S, Eremin A, Gorbunov A. 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. American Institute of Physics Inc. 2017. 020206 https://doi.org/10.1063/1.5013887

Smirnova, A. ; Pochivalov, Yu ; Panin, V. ; Panin, S. ; Eremin, A. ; Gorbunov, A. / The effect of advanced ultrasonic forging on fatigue fracture mechanisms of welded Ti-6A1-4V alloy. Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2017, AMHS 2017. Vol. 1909 American Institute of Physics Inc., 2017.

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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.",

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AB - 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.

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