Degree Type

Thesis

Date of Award

2017

Degree Name

Master of Science

Department

Materials Science and Engineering

Major

Materials Science and Engineering

First Advisor

Scott Chumbley

Abstract

The objective of this study was to investigate whether high pressure cold spray can be used to repair casting defects. The experiment conducted involved microstructural observations and mechanical property measurements of 316L stainless steel powder (20-44μ) cold sprayed coatings deposited onto a cast CA6NM martensitic stainless-steel substrate. The substrate was cold sprayed by hand using a VRC GEN III Cold Spray System with Nitrogen as the carrier gas. Substrate holes with different sizes and preparation techniques were created to mimic casting porosity. The backside of the plate was machined smooth and cold spray filled to perform ASTM C633 adhesion testing. Microstructural studies revealed cracks and improper bonding at the coating-substrate interface in many of the filled holes.

DOI

https://doi.org/10.31274/etd-180810-5821

Copyright Owner

Prathamesh Shivakumar Patil

Language

en

File Format

application/pdf

File Size

54 pages

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