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Influence of Strain Hardening on the Water Droplet Erosion Performance of 17-4 PH Stainless Steel

Title:

Influence of Strain Hardening on the Water Droplet Erosion Performance of 17-4 PH Stainless Steel

Shaik, Rizwan Ahmed (2021) Influence of Strain Hardening on the Water Droplet Erosion Performance of 17-4 PH Stainless Steel. Masters thesis, Concordia University.

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Abstract

Water Droplet Erosion (WDE) is a wear erosion phenomenon that is predominantly observed in gas, steam and wind turbines due to repetitive droplet impacts. In this work, various damage mechanisms pertaining to this phenomenon, described in the literature, are reviewed in detail. It was found that various surface treatments have been applied to delay the start of erosion in the material. However, in doing so the role of strain hardening was not well understood.
In this work, a suitable material is identified to study the effect of strain hardening on the WDE performance. The material was characterized for various mechanical properties and for water droplet erosion. The material was also tested for WDE by performing a Deep Rolling (DR) treatment before testing. The erosion incubation time is analyzed by considering the yield strength, elastic resilience and strain hardening exponent. It was found that the erosion incubation time is dependent on the yield strength, elastic resilience and strain hardening exponent of the material.
The role of strain hardening on WDE performance was also studied by intermittent strain relieving of the samples exposed to WDE. The frequency of strain relieving was found to influence the erosion behavior. It was observed that frequent strain relieving during WDE influences the erosion incubation time and the maximum erosion rate.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical, Industrial and Aerospace Engineering
Item Type:Thesis (Masters)
Authors:Shaik, Rizwan Ahmed
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Mechanical Engineering
Date:1 April 2021
Thesis Supervisor(s):Medraj, Mamoun and Pugh, Martin
Keywords:Water Droplet Erosion (WDE), strain hardening, 17-4 PH stainless steel, Deep Rolling (DR), mechanical properties, stress relieving
ID Code:988292
Deposited By: Rizwan Ahmed Shaik
Deposited On:29 Jun 2021 21:10
Last Modified:01 Jul 2023 00:00
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