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Mechanisms of Nickel-Based Coatings for Fretting Wear Mitigation of Ti6Al4V Interfaces

Hager, Carl H., Jr.
http://rave.ohiolink.edu/etdc/view?acc_num=wright1221763650

Abstract Details

2008, Doctor of Philosophy (PhD), Wright State University, Engineering PhD.
Fretting wear is an accumulation of damage that occurs at component interfaces that are subjected to high contact stresses coupled with low amplitude oscillation. The key to fretting wear reduction in metallic contacts is the mitigation of galling at the interface, followed by the control of debris production and the rheology of active wear debris. Once the thin surface species of the metallic interfaces is dispersed, adhesion between the contacting nascent surfaces causes the inception of severe surface deformation and material transfer or removal. This is extremely apparent in the fretting wear of aerospace materials such as titanium alloy and nickel alloy contacts. However, the literature suggests that nickel alloy contacts perform very well in sliding and reciprocating wear contacts at elevated temperatures due to the formation of what is often called a Glaze oxide layer. The current state of literature describes the composition of the glaze layer as NiO. The focus of this dissertation was to provide experimentation and analysis of temperature effects on the lubricious tribofilm formation that occurs in nickel contacts. This was accomplished by testing commercially pure nickel coatings and thick nickel oxide surfaces. The enhanced understanding of the fretting performance of nickel oxides aided in the development of nickel graphite based self-lubricating coatings. These coatings were then proved to reduce fretting wear damage within Ti6Al4V mated surfaces over a wide temperature range.
Ramana Grandhi, PhD (Advisor)
Terry Murray, PhD (Committee Member)
Joseph Slater, PhD (Committee Member)
Jeffrey Sanders, PhD (Committee Member)
Andrey Voevodin, PhD (Committee Member)
Daniel Young, PhD (Committee Member)
209 p.
Engineering; Experiments; Materials Science
fretting wear; titanium alloys; Ti6Al4V; nickel; nickel coatings; nickel oxide; high temperature; gross slip

Recommended Citations

Citations

  • Hager, Jr., C. H. (2008). Mechanisms of Nickel-Based Coatings for Fretting Wear Mitigation of Ti6Al4V Interfaces [Doctoral dissertation, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1221763650

    APA Style (7th edition)

  • Hager, Jr., Carl. Mechanisms of Nickel-Based Coatings for Fretting Wear Mitigation of Ti6Al4V Interfaces. 2008. Wright State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1221763650.

    MLA Style (8th edition)

  • Hager, Jr., Carl. "Mechanisms of Nickel-Based Coatings for Fretting Wear Mitigation of Ti6Al4V Interfaces." Doctoral dissertation, Wright State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1221763650

    Chicago Manual of Style (17th edition)

wright1221763650
1,136
© 2008, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.