The coupling effects of laser thermal shock and surface nitridation on mechanical properties of Zr-based metallic glass

Hu Huang, Minqiang Jiang, Jiwang Yan

Research output: Contribution to journalArticle

Abstract

Laser processing is a versatile tool for applications in the field of metallic glasses (MGs). Previous studies reported that surface nitridation, i.e. the formation of ZrN phase, occurred when laser irradiation of Zr-based MG was performed in nitrogen gas. Additionally, it was reported that laser thermal shock usually softened the irradiated surface. Therefore, the coupling effects of laser thermal shock and surface nitridation on mechanical characteristics of Zr-based MG should be further clarified. For this purpose, in this study, laser irradiation of Zr-based MG was conducted under various experimental conditions, followed by evaluating the surface characteristics by X-ray diffraction (XRD), nanoindentation, and energy-dispersive X-ray (EDX) spectroscopy. Experimental results indicated that the nanoindentation hardness, serrated flow, and surface shear bands were significantly affected by laser irradiation in nitrogen gas. Both surface softening and hardening were observed which depended on the experimental conditions. A competition mechanism between laser thermal shock and the introduction of ZrN phase was employed to rationalize these results. Furthermore, the affecting layer of ZrN phase along the depth direction was measured by EDX. The obtained results suggest a new method to introduce secondary phase into Zr-based MG surface and further to tune the mechanical characteristics of MGs.

LanguageEnglish
Pages864-874
Number of pages11
JournalJournal of Alloys and Compounds
Volume770
DOIs
Publication statusPublished - 2019 Jan 5

Fingerprint

Nitridation
Thermal shock
Metallic glass
Mechanical properties
Lasers
Laser beam effects
Nanoindentation
Nitrogen
Gases
Shear bands
Hardening
Hardness
X ray diffraction
X rays
Processing

Keywords

  • Hardness
  • Laser irradiation
  • Metallic glass
  • Serrated flow
  • Shear band
  • Surface nitridation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

The coupling effects of laser thermal shock and surface nitridation on mechanical properties of Zr-based metallic glass. / Huang, Hu; Jiang, Minqiang; Yan, Jiwang.

In: Journal of Alloys and Compounds, Vol. 770, 05.01.2019, p. 864-874.

Research output: Contribution to journalArticle

@article{7d37d8ae5bd04d16a12cc49e82f0f2be,
title = "The coupling effects of laser thermal shock and surface nitridation on mechanical properties of Zr-based metallic glass",
abstract = "Laser processing is a versatile tool for applications in the field of metallic glasses (MGs). Previous studies reported that surface nitridation, i.e. the formation of ZrN phase, occurred when laser irradiation of Zr-based MG was performed in nitrogen gas. Additionally, it was reported that laser thermal shock usually softened the irradiated surface. Therefore, the coupling effects of laser thermal shock and surface nitridation on mechanical characteristics of Zr-based MG should be further clarified. For this purpose, in this study, laser irradiation of Zr-based MG was conducted under various experimental conditions, followed by evaluating the surface characteristics by X-ray diffraction (XRD), nanoindentation, and energy-dispersive X-ray (EDX) spectroscopy. Experimental results indicated that the nanoindentation hardness, serrated flow, and surface shear bands were significantly affected by laser irradiation in nitrogen gas. Both surface softening and hardening were observed which depended on the experimental conditions. A competition mechanism between laser thermal shock and the introduction of ZrN phase was employed to rationalize these results. Furthermore, the affecting layer of ZrN phase along the depth direction was measured by EDX. The obtained results suggest a new method to introduce secondary phase into Zr-based MG surface and further to tune the mechanical characteristics of MGs.",
keywords = "Hardness, Laser irradiation, Metallic glass, Serrated flow, Shear band, Surface nitridation",
author = "Hu Huang and Minqiang Jiang and Jiwang Yan",
year = "2019",
month = "1",
day = "5",
doi = "10.1016/j.jallcom.2018.08.195",
language = "English",
volume = "770",
pages = "864--874",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - The coupling effects of laser thermal shock and surface nitridation on mechanical properties of Zr-based metallic glass

AU - Huang, Hu

AU - Jiang, Minqiang

AU - Yan, Jiwang

PY - 2019/1/5

Y1 - 2019/1/5

N2 - Laser processing is a versatile tool for applications in the field of metallic glasses (MGs). Previous studies reported that surface nitridation, i.e. the formation of ZrN phase, occurred when laser irradiation of Zr-based MG was performed in nitrogen gas. Additionally, it was reported that laser thermal shock usually softened the irradiated surface. Therefore, the coupling effects of laser thermal shock and surface nitridation on mechanical characteristics of Zr-based MG should be further clarified. For this purpose, in this study, laser irradiation of Zr-based MG was conducted under various experimental conditions, followed by evaluating the surface characteristics by X-ray diffraction (XRD), nanoindentation, and energy-dispersive X-ray (EDX) spectroscopy. Experimental results indicated that the nanoindentation hardness, serrated flow, and surface shear bands were significantly affected by laser irradiation in nitrogen gas. Both surface softening and hardening were observed which depended on the experimental conditions. A competition mechanism between laser thermal shock and the introduction of ZrN phase was employed to rationalize these results. Furthermore, the affecting layer of ZrN phase along the depth direction was measured by EDX. The obtained results suggest a new method to introduce secondary phase into Zr-based MG surface and further to tune the mechanical characteristics of MGs.

AB - Laser processing is a versatile tool for applications in the field of metallic glasses (MGs). Previous studies reported that surface nitridation, i.e. the formation of ZrN phase, occurred when laser irradiation of Zr-based MG was performed in nitrogen gas. Additionally, it was reported that laser thermal shock usually softened the irradiated surface. Therefore, the coupling effects of laser thermal shock and surface nitridation on mechanical characteristics of Zr-based MG should be further clarified. For this purpose, in this study, laser irradiation of Zr-based MG was conducted under various experimental conditions, followed by evaluating the surface characteristics by X-ray diffraction (XRD), nanoindentation, and energy-dispersive X-ray (EDX) spectroscopy. Experimental results indicated that the nanoindentation hardness, serrated flow, and surface shear bands were significantly affected by laser irradiation in nitrogen gas. Both surface softening and hardening were observed which depended on the experimental conditions. A competition mechanism between laser thermal shock and the introduction of ZrN phase was employed to rationalize these results. Furthermore, the affecting layer of ZrN phase along the depth direction was measured by EDX. The obtained results suggest a new method to introduce secondary phase into Zr-based MG surface and further to tune the mechanical characteristics of MGs.

KW - Hardness

KW - Laser irradiation

KW - Metallic glass

KW - Serrated flow

KW - Shear band

KW - Surface nitridation

UR - http://www.scopus.com/inward/record.url?scp=85052310804&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85052310804&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2018.08.195

DO - 10.1016/j.jallcom.2018.08.195

M3 - Article

VL - 770

SP - 864

EP - 874

JO - Journal of Alloys and Compounds

T2 - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -