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osu1218473077.pdf (11.32 MB)
ETD Abstract Container
Abstract Header
Structure-Composition-Property Relationships In 5xxx Series Aluminum Alloys
Author Info
Unocic, Kinga Angelika
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=osu1218473077
Abstract Details
Year and Degree
2008, Doctor of Philosophy, Ohio State University, Materials Science and Engineering.
Abstract
Al-Mg alloys are well suited for marine applications due to their low density, ease of fabrication, structural durability, and most notably resistance to corrosion. The purpose of this study is to investigate the effects of alloying additions, mechanical processing and heat treatments on the development of grain boundary phases that have an effect on intergranular corrosion resistance (IGC). Through modification of the standard AA5083 composition with extra additions of Cu and Zn and in conjunction with a long sensitization heat treatment (in excess of 1000 hrs at 165°C) it is possible to form a corrosion resistance modified τ-phase along grain boundaries. From an economical standpoint it is too costly to heat treat an alloy for such a long period of time and therefore an alternative method of producing a corrosion resistant alloy has been explored. Cu, Zn, and Si modified compositions were produced and were subjected to a high degree of cold work and shorter sensitization times. Following ASTM G67 intergranular corrosion testing and a detailed microstructural characterization, an optimal composition and processing condition that yielded the best intergranular corrosion resistance was determined. The microstructural development that led to these findings and issues with TEM sample preparation will be discussed in detail.
Committee
Glenn Daehn, PhD (Advisor)
Michael Mills, PhD (Committee Member)
Buchheit Rudolph, PhD (Committee Member)
Partridge Mark, PhD (Committee Member)
Subject Headings
Materials Science
Keywords
Al-Mg alloys
;
Al3Mg2
;
Intergranular corrosion
;
pitting corrosion
Recommended Citations
Refworks
EndNote
RIS
Mendeley
Citations
Unocic, K. A. (2008).
Structure-Composition-Property Relationships In 5xxx Series Aluminum Alloys
[Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1218473077
APA Style (7th edition)
Unocic, Kinga.
Structure-Composition-Property Relationships In 5xxx Series Aluminum Alloys.
2008. Ohio State University, Doctoral dissertation.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=osu1218473077.
MLA Style (8th edition)
Unocic, Kinga. "Structure-Composition-Property Relationships In 5xxx Series Aluminum Alloys." Doctoral dissertation, Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1218473077
Chicago Manual of Style (17th edition)
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Document number:
osu1218473077
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4,857
Copyright Info
© 2008, some rights reserved.
Structure-Composition-Property Relationships In 5xxx Series Aluminum Alloys by Kinga Angelika Unocic is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by The Ohio State University and OhioLINK.