Fuzzy multicriteria decision-making-based optimal Zn–Al alloy selection in corrosive environment
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Ankur V. Bansod
Abstract
Suitable material selection with emphasis on a specific property or application is an indispensable part of engineering sciences. It is a complex process that involves multiple criteria and often multiple decision makers. The tendency of decision makers to specify their preference in terms of imprecise qualitative statements like ‘good’, ‘bad’ etc. poses a further challenge. Thus, in this research, a comprehensive multicriteria decision-making study was conducted to select the optimal Zn-Al alloy based on performance in a corrosive environment. Four variants of technique for order of preference by similarity to the ideal solution were used to perform the multicriteria decision-making analysis. Group decision and imprecise decision making is handled by incorporating the fuzzy theory concept in a technique for order of preference by similarity to the ideal solution. The effect of addition of aluminium to zinc was studied by examination of microstructure, hardness, and corrosion behaviour. The result indicates that an increase in Al content increases the formation of dendrites. The dendrites were rich in the α phase, which results in an increase in hardness. An increase in Al content in Zn (Zn-22Al and Zn-55Al) results in the uniform distribution of the a phase in the microstructure and reduction of non-equilibrium phases. The potentiodynamic polarisation test revealed that an increase in Al in the alloy decreases the corrosion current density. The weight loss test carried out to validate the potentiodynamic test findings exhibited higher weight loss in pure Zn and lowest in Zn-55Al. Similar results were observed in the salt spray test. The multicriteria decision-making analysis revealed that Zn-55Al is the most suitable alloy in a corrosive environment among the tested alloys.
© 2020 by Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- CONTENTS
- Original Contributions
- Residual stress analysis, mechanical and metallurgical properties of dissimilar weldments of Monel 400 and AISI 316
- Dry sliding wear behaviour of sub-zero processed Cr–V ledeburitic steel Vanadis 6 against three counterpart types
- Computational thermodynamics/kinetics aided design for the microstructure of pearlitic steels during cooling process
- Brazed coatings for steam turbine blades: impact of the tape architecture and composition on mechanical properties
- Microstructure and properties of rare earth CeO2-doped graphene composite coatings prepared by MAO on AA7050
- Investigation of the effect of solidification rate on microstructure of Al-0.13Si-0.3Fe DC-cast alloy using EBSD and DSC techniques
- Crystallization behavior, Al-Ce intermetallic formation, and microstructure refinement of near-eutectic Al–Si alloys by rare-earth element additions
- Fuzzy multicriteria decision-making-based optimal Zn–Al alloy selection in corrosive environment
- Notifications
- DGM
- Conferences
- Imprint
Artikel in diesem Heft
- CONTENTS
- Original Contributions
- Residual stress analysis, mechanical and metallurgical properties of dissimilar weldments of Monel 400 and AISI 316
- Dry sliding wear behaviour of sub-zero processed Cr–V ledeburitic steel Vanadis 6 against three counterpart types
- Computational thermodynamics/kinetics aided design for the microstructure of pearlitic steels during cooling process
- Brazed coatings for steam turbine blades: impact of the tape architecture and composition on mechanical properties
- Microstructure and properties of rare earth CeO2-doped graphene composite coatings prepared by MAO on AA7050
- Investigation of the effect of solidification rate on microstructure of Al-0.13Si-0.3Fe DC-cast alloy using EBSD and DSC techniques
- Crystallization behavior, Al-Ce intermetallic formation, and microstructure refinement of near-eutectic Al–Si alloys by rare-earth element additions
- Fuzzy multicriteria decision-making-based optimal Zn–Al alloy selection in corrosive environment
- Notifications
- DGM
- Conferences
- Imprint
