Menu
Search
Filters
Close
Menu

51317-9761- Microstructural influences of corrosion sensitization in Al 5XXX series aluminum alloys

Picture for 51317-9761- Microstructural influences of corrosion sensitization in Al 5XXX series aluminum alloys
Available for download

The relationship between this sensitization and the microstructural features of Al 5083-H116, 5083-H131, 5083-H321, 5456-H116 aluminum alloys, such as grain boundary misorientation angle, dislocation densities, and β phase nucleation densities were examined and reviewed.

Product Number: 51317-9761-SG
Author: Erik Sundberg / Michael Free
Publication Date: 2017
Industry: Materials Selection and Design
$20.00
$20.00
$20.00

Al 5XXX series aluminum alloys are being used in naval military applications, and being exposed to outdoor environments. With sufficient time and temperature exposure, these alloys undergo a process in which a secondary β phase forms at the grain boundary that sensitizes the alloy to stress corrosion cracking. The relationship between this sensitization and the microstructural features of Al 5083-H116, 5083-H131, 5083-H321, 5456-H116 aluminum alloys, such as grain boundary misorientation angle, dislocation densities, and β phase nucleation densities were examined and reviewed. Samples were aged for up to 30 months at varying temperatures (40°C, 50°C, 60°C, and 70°C), then analyzed using the ASTM G-67 mass loss test. Grain size and grain boundary information were collected via electron backscatter diffraction (EBSD). Geometrical dislocation density information was calculated from the EBSD data. SEM and AFM data were used to determine β phase nucleation density values. Grain boundary misorientation angle, grain size, and dislocation density were found to influence the β phase nucleation density and rate of sensitization. These features were correlated with the mass loss tests performed on these alloys at varying degrees of sensitization. A model was built to simulate the effects of these different factors on the sensitization rate and outcome of the mass loss tests.

Key words: conference papers, 2017 conference papers, Military, aluminum, alloys, stress corrosion cracking, ships, mass loss test

 

Al 5XXX series aluminum alloys are being used in naval military applications, and being exposed to outdoor environments. With sufficient time and temperature exposure, these alloys undergo a process in which a secondary β phase forms at the grain boundary that sensitizes the alloy to stress corrosion cracking. The relationship between this sensitization and the microstructural features of Al 5083-H116, 5083-H131, 5083-H321, 5456-H116 aluminum alloys, such as grain boundary misorientation angle, dislocation densities, and β phase nucleation densities were examined and reviewed. Samples were aged for up to 30 months at varying temperatures (40°C, 50°C, 60°C, and 70°C), then analyzed using the ASTM G-67 mass loss test. Grain size and grain boundary information were collected via electron backscatter diffraction (EBSD). Geometrical dislocation density information was calculated from the EBSD data. SEM and AFM data were used to determine β phase nucleation density values. Grain boundary misorientation angle, grain size, and dislocation density were found to influence the β phase nucleation density and rate of sensitization. These features were correlated with the mass loss tests performed on these alloys at varying degrees of sensitization. A model was built to simulate the effects of these different factors on the sensitization rate and outcome of the mass loss tests.

Key words: conference papers, 2017 conference papers, Military, aluminum, alloys, stress corrosion cracking, ships, mass loss test

 

Product tags
Also Purchased
Picture for Ethics for the Corrosion Professional

Ethics for the Corrosion Professional (English Version)

Product Number: Ethics eCourse
$99.00

The corrosion profession, and the certified professionals who work in the industry, are committed to protecting people, assets, and the environment from the effects of corrosion. Those tasked with delivering the technical expertise to society must conduct their work with the knowledge and understanding of the ethical principles expected and required of those professionals.

The AMPP Code of Ethics is discussed in conjunction with relevant case studies and features real-life ethical violations of the AMPP attestations. Frameworks for making ethical decisions are also reviewed in this course along with the factors in the corrosion industry that can lead to unethical behavior.

This is an online, self-paced course which should take 1.5 to 2 hours to complete. After you have purchased the course in the store, log into your AMPP profile and select “Online Courses” to begin.

 

Purchase of this course includes a one-year subscription and is non-refundable. Students will have access to all course materials for a period of one year from the date of registration. All course work must be completed during this time period. Extensions or transfers cannot be granted.

 
Picture for 98319 EVALUATION OF PITTING CORROSION
Available for download

98319 EVALUATION OF PITTING CORROSION WITH ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY (EIS) FOR ALUMINA/ALUMINUM ALLOY COMPOSITES

Product Number: 51300-98319-SG
ISBN: 98319 1998 CP
Author: Charles Odegard, Arturo Bronson
$20.00
Picture for 98740 RAPID ELECTROCHEMICAL CORROSION TESTING
Available for download

98740 RAPID ELECTROCHEMICAL CORROSION TESTING OF CHEMICALLY PASSIVATED ALUMINUM ALLOYS

Product Number: 51300-98740-SG
ISBN: 98740 1998 CP
Author: R. G. Buchheit, M. Cunningham, H. Jensen, M. W. Kendig, M. A. Martinez
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support