Surface nanocrystallization by ultrasonic nano-crystal surface modification and its effect on gas nitriding of Ti6Al4V alloy

Jun Liu, Sergey Suslov, Azhar Vellore, Zhencheng Ren, Auezhan Amanov, Young Sik Pyun, Ashlie Martini, Yalin Dong, Chang Ye

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effects of Ultrasonic Nanocrystal Surface Modification (UNSM) on the gas nitriding behavior of Ti6Al4V alloy have been investigated. Gas nitriding was performed at 700 and 800 °C. The microstructure after UNSM and gas nitriding was characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Microstructural investigations revealed the formation of an approximately 10 µm thick severe plastic deformation layer as well as nano-grains after UNSM treatment. The UNSM-treated Ti6Al4V alloy formed 0.26 µm and 1.35 µm thick nitride layers after nitriding at 700 °C and 800 °C, respectively, and UNSM resulted in an increased layer thickness relative to untreated samples at both temperatures. The results suggest that nitrogen adsorption and reaction capability were enhanced in the UNSM-treated Ti6Al4V alloy. This enhancement can be attributed to high-density dislocations and grain boundaries that were introduced by UNSM and served as efficient channels for nitrogen diffusion.

Original languageEnglish
Pages (from-to)335-343
Number of pages9
JournalMaterials Science and Engineering A
Volume736
DOIs
Publication statusPublished - 24 Oct 2018

Fingerprint

Nanocrystallization
nitriding
Nitriding
crystal surfaces
Nanocrystals
Surface treatment
nanocrystals
ultrasonics
Gases
Ultrasonics
Crystals
gases
Nitrogen
nitrogen
titanium alloy (TiAl6V4)
Dislocations (crystals)
Nitrides
plastic deformation
nitrides
Plastic deformation

Keywords

  • Gas nitriding
  • Nanocrystalline
  • Scratch test
  • Surface severe plastic deformation
  • Ti64
  • Ultrasonic nanocrystal surface modification

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Surface nanocrystallization by ultrasonic nano-crystal surface modification and its effect on gas nitriding of Ti6Al4V alloy. / Liu, Jun; Suslov, Sergey; Vellore, Azhar; Ren, Zhencheng; Amanov, Auezhan; Pyun, Young Sik; Martini, Ashlie; Dong, Yalin; Ye, Chang.

In: Materials Science and Engineering A, Vol. 736, 24.10.2018, p. 335-343.

Research output: Contribution to journalArticle

Liu, Jun ; Suslov, Sergey ; Vellore, Azhar ; Ren, Zhencheng ; Amanov, Auezhan ; Pyun, Young Sik ; Martini, Ashlie ; Dong, Yalin ; Ye, Chang. / Surface nanocrystallization by ultrasonic nano-crystal surface modification and its effect on gas nitriding of Ti6Al4V alloy. In: Materials Science and Engineering A. 2018 ; Vol. 736. pp. 335-343.
@article{d81994e547ae4eaeb1e2dd7ca11500a8,
title = "Surface nanocrystallization by ultrasonic nano-crystal surface modification and its effect on gas nitriding of Ti6Al4V alloy",
abstract = "The effects of Ultrasonic Nanocrystal Surface Modification (UNSM) on the gas nitriding behavior of Ti6Al4V alloy have been investigated. Gas nitriding was performed at 700 and 800 °C. The microstructure after UNSM and gas nitriding was characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Microstructural investigations revealed the formation of an approximately 10 µm thick severe plastic deformation layer as well as nano-grains after UNSM treatment. The UNSM-treated Ti6Al4V alloy formed 0.26 µm and 1.35 µm thick nitride layers after nitriding at 700 °C and 800 °C, respectively, and UNSM resulted in an increased layer thickness relative to untreated samples at both temperatures. The results suggest that nitrogen adsorption and reaction capability were enhanced in the UNSM-treated Ti6Al4V alloy. This enhancement can be attributed to high-density dislocations and grain boundaries that were introduced by UNSM and served as efficient channels for nitrogen diffusion.",
keywords = "Gas nitriding, Nanocrystalline, Scratch test, Surface severe plastic deformation, Ti64, Ultrasonic nanocrystal surface modification",
author = "Jun Liu and Sergey Suslov and Azhar Vellore and Zhencheng Ren and Auezhan Amanov and Pyun, {Young Sik} and Ashlie Martini and Yalin Dong and Chang Ye",
year = "2018",
month = "10",
day = "24",
doi = "10.1016/j.msea.2018.08.089",
language = "English",
volume = "736",
pages = "335--343",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Surface nanocrystallization by ultrasonic nano-crystal surface modification and its effect on gas nitriding of Ti6Al4V alloy

AU - Liu, Jun

AU - Suslov, Sergey

AU - Vellore, Azhar

AU - Ren, Zhencheng

AU - Amanov, Auezhan

AU - Pyun, Young Sik

AU - Martini, Ashlie

AU - Dong, Yalin

AU - Ye, Chang

PY - 2018/10/24

Y1 - 2018/10/24

N2 - The effects of Ultrasonic Nanocrystal Surface Modification (UNSM) on the gas nitriding behavior of Ti6Al4V alloy have been investigated. Gas nitriding was performed at 700 and 800 °C. The microstructure after UNSM and gas nitriding was characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Microstructural investigations revealed the formation of an approximately 10 µm thick severe plastic deformation layer as well as nano-grains after UNSM treatment. The UNSM-treated Ti6Al4V alloy formed 0.26 µm and 1.35 µm thick nitride layers after nitriding at 700 °C and 800 °C, respectively, and UNSM resulted in an increased layer thickness relative to untreated samples at both temperatures. The results suggest that nitrogen adsorption and reaction capability were enhanced in the UNSM-treated Ti6Al4V alloy. This enhancement can be attributed to high-density dislocations and grain boundaries that were introduced by UNSM and served as efficient channels for nitrogen diffusion.

AB - The effects of Ultrasonic Nanocrystal Surface Modification (UNSM) on the gas nitriding behavior of Ti6Al4V alloy have been investigated. Gas nitriding was performed at 700 and 800 °C. The microstructure after UNSM and gas nitriding was characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Microstructural investigations revealed the formation of an approximately 10 µm thick severe plastic deformation layer as well as nano-grains after UNSM treatment. The UNSM-treated Ti6Al4V alloy formed 0.26 µm and 1.35 µm thick nitride layers after nitriding at 700 °C and 800 °C, respectively, and UNSM resulted in an increased layer thickness relative to untreated samples at both temperatures. The results suggest that nitrogen adsorption and reaction capability were enhanced in the UNSM-treated Ti6Al4V alloy. This enhancement can be attributed to high-density dislocations and grain boundaries that were introduced by UNSM and served as efficient channels for nitrogen diffusion.

KW - Gas nitriding

KW - Nanocrystalline

KW - Scratch test

KW - Surface severe plastic deformation

KW - Ti64

KW - Ultrasonic nanocrystal surface modification

UR - http://www.scopus.com/inward/record.url?scp=85053081722&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053081722&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2018.08.089

DO - 10.1016/j.msea.2018.08.089

M3 - Article

VL - 736

SP - 335

EP - 343

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

ER -