The effect of laser surface hardening on the wear and friction characteristics of acicular bainitic ductile iron

K. M. Adel, A. S. Dhia, Mariyam Jameelah Ghazali

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Nd-Yag (Neodymium Yttrium) pulsed wave laser has been used to modify and refine the surface microstructure of acicular bainitic ductile iron. The wear characteristics evaluated by adhesion and abrasion wear tests while friction characteristics evaluated by using strain gauge technique of the laser processed and unprocessed (as-cast) specimens were studied. The wear and friction resistance of laser processed samples are significantly enhanced by their refined bainitic microstructures and improved hardness in the melted and resolidified layer. Cross-sectional optical and scanning electron microscope have been used to study the microstructure and wear mechanism of the laser processed and unprocessed surfaces while X-Ray diffraction technique has been used to study and estimate the metallurgical phases. Subsurface micro cracks generation and retained austenite phase have been observed. All specimens treated by laser showed wear and friction resistance higher than as-cast specimens at all loads, sliding speeds and sliding times used in this research work.

Original languageEnglish
Pages (from-to)167-171
Number of pages5
JournalInternational Journal of Mechanical and Materials Engineering
Volume4
Issue number2
Publication statusPublished - 2009

Fingerprint

Nodular iron
Hardening
Wear of materials
Friction
Lasers
Microstructure
Neodymium
Yttrium
Strain gages
Abrasion
Austenite
Electron microscopes
Adhesion
Hardness
Cracks
Scanning
X ray diffraction

Keywords

  • Acicular bainitic ductile iron
  • Friction characteristics
  • Laser surface hardening
  • Wear&

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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AU - Adel, K. M.

AU - Dhia, A. S.

AU - Ghazali, Mariyam Jameelah

PY - 2009

Y1 - 2009

N2 - Nd-Yag (Neodymium Yttrium) pulsed wave laser has been used to modify and refine the surface microstructure of acicular bainitic ductile iron. The wear characteristics evaluated by adhesion and abrasion wear tests while friction characteristics evaluated by using strain gauge technique of the laser processed and unprocessed (as-cast) specimens were studied. The wear and friction resistance of laser processed samples are significantly enhanced by their refined bainitic microstructures and improved hardness in the melted and resolidified layer. Cross-sectional optical and scanning electron microscope have been used to study the microstructure and wear mechanism of the laser processed and unprocessed surfaces while X-Ray diffraction technique has been used to study and estimate the metallurgical phases. Subsurface micro cracks generation and retained austenite phase have been observed. All specimens treated by laser showed wear and friction resistance higher than as-cast specimens at all loads, sliding speeds and sliding times used in this research work.

AB - Nd-Yag (Neodymium Yttrium) pulsed wave laser has been used to modify and refine the surface microstructure of acicular bainitic ductile iron. The wear characteristics evaluated by adhesion and abrasion wear tests while friction characteristics evaluated by using strain gauge technique of the laser processed and unprocessed (as-cast) specimens were studied. The wear and friction resistance of laser processed samples are significantly enhanced by their refined bainitic microstructures and improved hardness in the melted and resolidified layer. Cross-sectional optical and scanning electron microscope have been used to study the microstructure and wear mechanism of the laser processed and unprocessed surfaces while X-Ray diffraction technique has been used to study and estimate the metallurgical phases. Subsurface micro cracks generation and retained austenite phase have been observed. All specimens treated by laser showed wear and friction resistance higher than as-cast specimens at all loads, sliding speeds and sliding times used in this research work.

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