Naval Postgraduate School
Dudley Knox Library
NPS Dudley Knox Library
View Item 
  •   Calhoun Home
  • Theses and Dissertations
  • 1. Thesis and Dissertation Collection, all items
  • View Item
  •   Calhoun Home
  • Theses and Dissertations
  • 1. Thesis and Dissertation Collection, all items
  • View Item
  • How to search in Calhoun
  • My Accounts
  • Ask a Librarian
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse

All of CalhounCollectionsThis Collection

My Account

LoginRegister

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

The effect of applied tensile stress on localized corrosion in sensitized AA5083

Thumbnail
Download
Icon15Sep_Johnston_Roy.pdf (9.145Mb)
Download Record
Download to EndNote/RefMan (RIS)
Download to BibTex
Author
Johnston, Roy T.
Date
2015-09
Advisor
Menon, Sarath K.
Brewer, Luke N.
Metadata
Show full item record
Abstract
This thesis describes significant changes in the type and degree of localized corrosion for sensitized AA5083 under an applied tensile stress. AA5083 is an aluminum-magnesium alloy that experiences severe intergranular corrosion and intergranular stress corrosion cracking if sensitized. In this research, AA5083-H116 plates were cut into bend-bar samples along both the rolling and transverse directions, and then sensitized to two different levels using laboratory heat treatments of 7 and 30 days at 100°C. The sensitized samples were subjected to elastic tensile loading using a 4-point bend rig while being exposed to a 0.6 molar saltwater solution. Electrochemical polarization was performed on the tensile regions of the samples while under applied stress. Potentiodynamic scans showed that although sensitization causes the most change in electrochemistry, stress does shift the Tafel plot to be more stable when comparing the values for open circuit potential, but reduces the pitting potential of the passivating oxides. Confocal microscopy showed that samples with applied tensile stress produced a much higher density of localized corrosion, including pitting and intergranular corrosion than samples without applied tensile stress. The degree of corrosion damage was slightly higher for samples loaded in the transverse direction compared to samples loaded in the longitudinal direction.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/47281
Collections
  • 1. Thesis and Dissertation Collection, all items

Related items

Showing items related by title, author, creator and subject.

  • Thumbnail

    THE ROLE OF STRESS IN THE CORROSION CRACKING OF ALUMINUM ALLOYS 

    Scott, Brian E-S. (Monterey, California. Naval Postgraduate School, 2013-03);
    This work examines the effect of stress on the rate of sensitization, the rate of pitting corrosion and the rate of crack nucleation of aluminum alloy 5083-H116 aluminum. Stress corrosion cracking in aluminum superstructures ...
  • Thumbnail

    The effects of applied stress and sensitization on the passive film stability of AL-MG alloys 

    Fleming, Jennifer S. (Monterey, California: Naval Postgraduate School, 2013-06);
    This thesis evaluates effects of stress on the corrosion behavior for the aluminum magnesium alloy AA5083 in a comprehensive and systematic manner. This study used cyclic polarization and electrochemical impedance spectroscopy ...
  • Thumbnail

    Characterization of aluminum-magnesium alloy reverse sensitized via heat treatment 

    Gamble, Kevin D. (Monterey, California: Naval Postgraduate School, 2016-09);
    This research explores a novel repair technique to reverse the sensitization of aluminum magnesium (Al-Mg) alloys. Al-Mg alloys can become sensitized when magnesium comes out of solution as a second phase, Al₃Mg₂, on the ...
NPS Dudley Knox LibraryDUDLEY KNOX LIBRARY
Feedback

411 Dyer Rd. Bldg. 339
Monterey, CA 93943
circdesk@nps.edu
(831) 656-2947
DSN 756-2947

    Federal Depository Library      


Start Your Research

Research Guides
Academic Writing
Ask a Librarian
Copyright at NPS
Graduate Writing Center
How to Cite
Library Liaisons
Research Tools
Thesis Processing Office

Find & Download

Databases List
Articles, Books & More
NPS Theses
NPS Faculty Publications: Calhoun
Journal Titles
Course Reserves

Use the Library

My Accounts
Request Article or Book
Borrow, Renew, Return
Tech Help
Remote Access
Workshops & Tours

For Faculty & Researchers
For International Students
For Alumni

Print, Copy, Scan, Fax
Rooms & Study Spaces
Floor Map
Computers & Software
Adapters, Lockers & More

Collections

NPS Archive: Calhoun
Restricted Resources
Special Collections & Archives
Federal Depository
Homeland Security Digital Library

About

Hours
Library Staff
About Us
Special Exhibits
Policies
Our Affiliates
Visit Us

NPS-Licensed Resources—Terms & Conditions
Copyright Notice

Naval Postgraduate School

Naval Postgraduate School
1 University Circle, Monterey, CA 93943
Driving Directions | Campus Map

This is an official U.S. Navy Website |  Please read our Privacy Policy Notice  |  FOIA |  Section 508 |  No FEAR Act |  Whistleblower Protection |  Copyright and Accessibility |  Contact Webmaster

Export search results

The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

A logged-in user can export up to 15000 items. If you're not logged in, you can export no more than 500 items.

To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.