Application of Stainless Steel onto Ultrahigh Strength Steel via Cold Spray

Driml, Matthew Peter (2012). Application of Stainless Steel onto Ultrahigh Strength Steel via Cold Spray B.Sc Thesis, School of Engineering, The University of Queensland.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
Driml_Matthew_Peter_Thesis.pdf Driml_Matthew_Peter_Thesis.pdf application/pdf 10.64MB 0
Author Driml, Matthew Peter
Thesis Title Application of Stainless Steel onto Ultrahigh Strength Steel via Cold Spray
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2012
Thesis type B.Sc Thesis
Supervisor Mingxing Zhang
Total pages 93
Language eng
Subjects 0912 Materials Engineering
Formatted abstract
AISI 4340 is an ultrahigh strength steel that combines properties such as deep hardenability, toughness and ductility. Such properties make it a material of choice in high stress aeronautical components, including landing gears.

However poor corrosion behaviour, especially with regard to stress-corrosion cracking, continues to limit its capabilities. Current prevention methods, such as expensive hard chrome plating, appear sub-optimal.

Cold spray is an emerging technology that is capable of applying a powder coating and high speeds by causing massive plastic deformation on contact with the substrate. It’s comparatively low delivery temperature, compared to more established thermal sprays, allows powder to retain bulk material microstructure and properties.

Kinetic metallization, a specific type of cold spray, was used to apply 316L stainless steel powder to 4340 substrates in an attempt to improve the steels corrosion resistance and characterize the coating.

Two variants of 316L stainless steel coatings were consistently applied to a 4340 substrate. 50wt% Al2O3 coating produced the thickest coating of 318µm per pass, as well as limited
signs of cracking in the microstructure and an average shear failure of 24.9MPa. Corrosion behaviour comparable to bulk stainless steel was achieved in both salt spray and polarization test.
Keyword Corrosion behavior
Stainless steel
Cold Spray

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
Citation counts: Google Scholar Search Google Scholar
Created: Tue, 09 Dec 2014, 15:51:03 EST by Ahmed Taha Siddiqui on behalf of Scholarly Communication and Digitisation Service