Structural Scale Levels of Plastic Deformation and Fracture of High-Strength Titanium Alloy Welds

V. E. Panin, S. V. Panin, Yu I. Pochivalov, A. S. Smirnova, A. V. Eremin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Structural scale levels of plastic deformation and fracture of welded joints have been studied for two high-strength titanium alloys with a low (VT18U alloy) and a high (VT23 alloy) content of the bcc ß phase. Ultrasonic forging and its combination with high-current pulsed electron beam treatment were used to activate nanoscale structural levels of deformation and fracture in welds in order to increase the fatigue life of welded structures. Ultrasonic forging provides an effective dispersion and nanostructuring of surface layers in the VT18U welded joints with a 4.6-fold increase in their fatigue life. The dispersion and nanostructuring of the VT23 laser welded joints is achieved only by ultrasonic forging combined with high-current electric pulse treatment, in which longitudinal dispersion of ß bands occurs with the formation of orthorhombic a " nanolaths. In so doing, the fatigue life of the VT23 welds increases twice, but the effect depends on the power of the high-current generator and electrical pulse parameters. The fracture micrographs of the treated VT23 welded joints reveal nanofibrous bands responsible for ductile fracture and for the reduction of the fatigue crack growth rate. The structural changes and the increase in the fatigue life of the studied titanium alloy welds are associated with the activation of nanoscale structural levels of deformation and fracture induced by ultrasonic forging or by its combination with high-current pulsed electron beam treatment.

Original languageEnglish
Pages (from-to)464-474
Number of pages11
JournalPhysical Mesomechanics
Volume21
Issue number5
DOIs
Publication statusPublished - 1 Sep 2018

Fingerprint

high strength alloys
High strength alloys
titanium alloys
welded joints
Titanium alloys
forging
fatigue life
plastic deformation
Plastic deformation
Welds
high current
ultrasonics
Forging
Ultrasonics
Fatigue of materials
welded structures
electron beams
electric pulses
Electron beams
Ductile fracture

Keywords

  • fatigue life
  • fracture
  • plastic deformation
  • structural scale levels
  • titanium alloys
  • welded joints

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces

Cite this

Structural Scale Levels of Plastic Deformation and Fracture of High-Strength Titanium Alloy Welds. / Panin, V. E.; Panin, S. V.; Pochivalov, Yu I.; Smirnova, A. S.; Eremin, A. V.

In: Physical Mesomechanics, Vol. 21, No. 5, 01.09.2018, p. 464-474.

Research output: Contribution to journalArticle

Panin, V. E. ; Panin, S. V. ; Pochivalov, Yu I. ; Smirnova, A. S. ; Eremin, A. V. / Structural Scale Levels of Plastic Deformation and Fracture of High-Strength Titanium Alloy Welds. In: Physical Mesomechanics. 2018 ; Vol. 21, No. 5. pp. 464-474.
@article{4fef09730d914c4cb80ac98ed4713da7,
title = "Structural Scale Levels of Plastic Deformation and Fracture of High-Strength Titanium Alloy Welds",
abstract = "Structural scale levels of plastic deformation and fracture of welded joints have been studied for two high-strength titanium alloys with a low (VT18U alloy) and a high (VT23 alloy) content of the bcc {\ss} phase. Ultrasonic forging and its combination with high-current pulsed electron beam treatment were used to activate nanoscale structural levels of deformation and fracture in welds in order to increase the fatigue life of welded structures. Ultrasonic forging provides an effective dispersion and nanostructuring of surface layers in the VT18U welded joints with a 4.6-fold increase in their fatigue life. The dispersion and nanostructuring of the VT23 laser welded joints is achieved only by ultrasonic forging combined with high-current electric pulse treatment, in which longitudinal dispersion of {\ss} bands occurs with the formation of orthorhombic a {"} nanolaths. In so doing, the fatigue life of the VT23 welds increases twice, but the effect depends on the power of the high-current generator and electrical pulse parameters. The fracture micrographs of the treated VT23 welded joints reveal nanofibrous bands responsible for ductile fracture and for the reduction of the fatigue crack growth rate. The structural changes and the increase in the fatigue life of the studied titanium alloy welds are associated with the activation of nanoscale structural levels of deformation and fracture induced by ultrasonic forging or by its combination with high-current pulsed electron beam treatment.",
keywords = "fatigue life, fracture, plastic deformation, structural scale levels, titanium alloys, welded joints",
author = "Panin, {V. E.} and Panin, {S. V.} and Pochivalov, {Yu I.} and Smirnova, {A. S.} and Eremin, {A. V.}",
year = "2018",
month = "9",
day = "1",
doi = "10.1134/S1029959918050107",
language = "English",
volume = "21",
pages = "464--474",
journal = "Physical Mesomechanics",
issn = "1029-9599",
publisher = "Springer Science + Business Media",
number = "5",

}

TY - JOUR

T1 - Structural Scale Levels of Plastic Deformation and Fracture of High-Strength Titanium Alloy Welds

AU - Panin, V. E.

AU - Panin, S. V.

AU - Pochivalov, Yu I.

AU - Smirnova, A. S.

AU - Eremin, A. V.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Structural scale levels of plastic deformation and fracture of welded joints have been studied for two high-strength titanium alloys with a low (VT18U alloy) and a high (VT23 alloy) content of the bcc ß phase. Ultrasonic forging and its combination with high-current pulsed electron beam treatment were used to activate nanoscale structural levels of deformation and fracture in welds in order to increase the fatigue life of welded structures. Ultrasonic forging provides an effective dispersion and nanostructuring of surface layers in the VT18U welded joints with a 4.6-fold increase in their fatigue life. The dispersion and nanostructuring of the VT23 laser welded joints is achieved only by ultrasonic forging combined with high-current electric pulse treatment, in which longitudinal dispersion of ß bands occurs with the formation of orthorhombic a " nanolaths. In so doing, the fatigue life of the VT23 welds increases twice, but the effect depends on the power of the high-current generator and electrical pulse parameters. The fracture micrographs of the treated VT23 welded joints reveal nanofibrous bands responsible for ductile fracture and for the reduction of the fatigue crack growth rate. The structural changes and the increase in the fatigue life of the studied titanium alloy welds are associated with the activation of nanoscale structural levels of deformation and fracture induced by ultrasonic forging or by its combination with high-current pulsed electron beam treatment.

AB - Structural scale levels of plastic deformation and fracture of welded joints have been studied for two high-strength titanium alloys with a low (VT18U alloy) and a high (VT23 alloy) content of the bcc ß phase. Ultrasonic forging and its combination with high-current pulsed electron beam treatment were used to activate nanoscale structural levels of deformation and fracture in welds in order to increase the fatigue life of welded structures. Ultrasonic forging provides an effective dispersion and nanostructuring of surface layers in the VT18U welded joints with a 4.6-fold increase in their fatigue life. The dispersion and nanostructuring of the VT23 laser welded joints is achieved only by ultrasonic forging combined with high-current electric pulse treatment, in which longitudinal dispersion of ß bands occurs with the formation of orthorhombic a " nanolaths. In so doing, the fatigue life of the VT23 welds increases twice, but the effect depends on the power of the high-current generator and electrical pulse parameters. The fracture micrographs of the treated VT23 welded joints reveal nanofibrous bands responsible for ductile fracture and for the reduction of the fatigue crack growth rate. The structural changes and the increase in the fatigue life of the studied titanium alloy welds are associated with the activation of nanoscale structural levels of deformation and fracture induced by ultrasonic forging or by its combination with high-current pulsed electron beam treatment.

KW - fatigue life

KW - fracture

KW - plastic deformation

KW - structural scale levels

KW - titanium alloys

KW - welded joints

UR - http://www.scopus.com/inward/record.url?scp=85057050230&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057050230&partnerID=8YFLogxK

U2 - 10.1134/S1029959918050107

DO - 10.1134/S1029959918050107

M3 - Article

AN - SCOPUS:85057050230

VL - 21

SP - 464

EP - 474

JO - Physical Mesomechanics

JF - Physical Mesomechanics

SN - 1029-9599

IS - 5

ER -