Microstructural Characterization of 3D Deposited Metal Structures

dc.contributor.authorSolomon, Jordanen
dc.contributor.departmentMechanical and Materials Engineeringen
dc.contributor.supervisorDaymond, Marken
dc.degree.grantorQueen's University at Kingstonen
dc.description.abstractThe microstructure of deposited materials is characterized using a variety of techniques. The two specific types of deposited materials studied are electrodeposited nickel and additive manufactured stainless steel. A focus is on utilizing optimal cross-sectional characterization techniques to observe the microstructure, where optimal refers to the length scale being probed and the cost of preparation and characterization methods. Techniques ranging from optical transmission electron microscopy are used. Three different length scales of electrodeposited nickel are observed, and a set of 16 SLM processed 316L stainless steel weld tracks are observed. The largest length scale nickel material is a commercially available foam, likely produced by electroplating nickel onto a sacrificial polymer template. The foam was prepared for EBSD using modification to standard metallography techniques. The average grain size was 5.73 µm with a random texture, suggesting a heat treatment used to remove the polymer template. Secondly, we studied mesoporous nickel samples. A measure of particle size as well as deposition layer thickness was performed using ImageJ in conjunction with SEM imaging. The smallest microstructural length scale of nickel materials was a set of nanostructured electrode catalysts. The grain size seen in the deposition layers was in the hundreds of nanometers, and an overall growth texture in the {112} direction was observed. The 316L stainless steel weld tracks were polished using standard metallographic techniques and etched in oxalic acid. This revealed a cellular structure. The cell sizes of two weld tracks were measured in ImageJ and compared with their applied energy densities. It was found that the track with the lower energy density had a slightly smaller cell size, the sizes being 4.7 ± 1.5 µm and 6.2 ± 1.2 µm respectively. An EBSD map of one weld track was also taken, illustrating the directional growth of SLM processed grains.en
dc.relation.ispartofseriesCanadian thesesen
dc.rightsQueen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canadaen
dc.rightsProQuest PhD and Master's Theses International Dissemination Agreementen
dc.rightsIntellectual Property Guidelines at Queen's Universityen
dc.rightsCopying and Preserving Your Thesisen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectMaterials Scienceen
dc.subjectAdditive Manufacturingen
dc.subjectSelective Laser Meltingen
dc.subject316L Stainless Steelen
dc.subjectTransmission Electron Microscopyen
dc.subjectScanning Electron Microscopyen
dc.subjectTransmission Kikuchi Diffractionen
dc.subjectElectron Backscatter Diffractionen
dc.subjectCrystallographic Textureen
dc.subjectMaterials Characterizationen
dc.titleMicrostructural Characterization of 3D Deposited Metal Structuresen
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
110.34 MB
Adobe Portable Document Format
Thesis document
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
2.6 KB
Item-specific license agreed upon to submission