Characterization of the Local Mechanical Properties of Interfaces in Heteregeneous Materials

Simple item page
dc.contributor.advisorSharma, Pradeep
dc.contributor.committeeMemberWhite, Kenneth W.
dc.contributor.committeeMemberTromas, Christophe
dc.contributor.committeeMemberVajtai, Robert
dc.contributor.committeeMemberRavi-Chandar, Krishnaswamy
dc.contributor.committeeMemberThilly, Ludovic L.
dc.contributor.committeeMemberBird, Marc
dc.contributor.committeeMemberKulkarni, Yashashree
dc.creatorGiouse, Jean Baptiste
dc.date.accessioned2020-01-07T03:55:30Z
dc.date.createdDecember 2018
dc.date.issued2018-12
dc.date.submittedDecember 2018
dc.date.updated2020-01-07T03:55:32Z
dc.description.abstractThe notion of “interface” is a universal topic of research in material sciences. Interfaces are responsible for many of the magnetic, electrical, optical and mechanical properties of materials and therefore need to be characterize. The focus of this work is to bring a new understanding of the interfacial mechanical properties of materials by characterizing two industrial components which properties are governed by their interfaces. First, we address the notion of coating and adhesion by characterizing the hardness and microstructure of a 17-4PH steel substrate subjected to a grit blasting surface treatment followed by the deposition of a cermet coating by high velocity oxy-fuel (HVOF). The hardness was characterized using nanoindentation and the microstructure was imaged by optical and electron microscopy. The results showed a strong impact of the surface treatment on the interfacial microstructure and hardness of the substrate revealing a potential weakening of the interfacial adhesion because of it. Then, in light of the results gathered, a similar method was applied to the characterization of an aluminum foam. However, the aluminum foam is a much more complex material and requires a multiscale approach. The structure and microstructures were characterized by several techniques to account for the multiscale nature of the material. Similarly, the mechanical properties were determined by diverse procedures. The results unveil a particularly inhomogeneous material at all scales resulting in non-uniform mechanical properties. The strong interdependence of the macroscopic and microscopic properties is highlighted and gives a better understanding of the mechanical behavior of the foam.
dc.description.departmentMechanical Engineering, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10657/5834
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectInterfaces
dc.subjectComposite materials
dc.subjectHigh Velocity Oxy Fuel (HVOF)
dc.subjectCermet coatings
dc.subjectAluminum foams
dc.subjectLocal mechanical properties
dc.subjectMicrostructure
dc.subjectNanoindentation cartography
dc.subjectX-ray tomography
dc.subjectScanning electron microscopy
dc.subjectTransmission electron microscopy
dc.titleCharacterization of the Local Mechanical Properties of Interfaces in Heteregeneous Materials
dc.type.dcmiText
dc.type.genreThesis
local.embargo.lift2020-12-01
local.embargo.terms2020-12-01
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentMechanical Engineering, Department of
thesis.degree.disciplineMaterials Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

Files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
GIOUSE-DISSERTATION-2018.pdf
Size:
30.28 MB
Format:
Adobe Portable Document Format
Download

License bundle

Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
4.44 KB
Format:
Plain Text
Description:
Download
No Thumbnail Available
Name:
LICENSE.txt
Size:
1.82 KB
Format:
Plain Text
Description:
Download

Collections

Published ETD Collection