Corrosion behaviour in friction stir processed and welded materials
01 Jan 2014-pp 295-328
TL;DR: In this article, a comprehensive study on the influence of friction stir processing/welding (FSW/FSP) on corrosion behavior is presented. But the authors only briefly discuss the different aspects of corrosion including corrosion types, measurement techniques and data analysis.
Abstract: This chapter presents a comprehensive study on the influence of friction stir processing/welding (FSW/FSP) on corrosion behaviour. It briefly discusses the different aspects of corrosion including corrosion types, measurement techniques and data analysis. The corrosion behaviour of a wide range of friction stir processed materials, including light weight metals such as magnesium and aluminum alloys, as well as high strength metals such as steel, has been discussed in detail. The influence of FSP parameters on the microstructural evolution, comprising grain-size and precipitate refinement along with its correlation with the corrosion properties, has been described for different materials.
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TL;DR: In this paper, the role of different pin geometries on the corrosion behavior of the butt friction stir welded (FSWed) joints of Al5086 was examined using Tafel polarization and electrochemical impedance spectroscopy tests.
11 citations
02 Nov 2020
TL;DR: In this paper, different combinations of AL alloys (AL 6351 and AL 6061) were welded and their effects over the mechanical properties of the weldments were compared in order to bring the best out of them.
Abstract: Friction-stir welding can be effectively used to weld aluminum materials with less defects. In this paper, in order to experimentally compare the effects of process parameters of friction-stir welding, different combinations of AL alloys (AL 6351 and AL 6061) were welded. Process parameters that were considered in this work were rotating speed, welding speed and plunge depth. Their effects over the mechanical properties of the weldments were compared in order to bring the best out of them. Weldments considered in this work has three different combinations. The first set of combination consists of AL 6351 and AL 6351. The second set of combination consists of AL 6061 and AL 6061 and the third and final set of combination consists of AL 6351 and AL 6061. The tensile strength for all these three set of combinations were tested using micro-tensile testing machine and the wear test for the parent materials and the three combinations were conducted using Pin-on-disc apparatus. Further, the hardness tests were also done using Rockwell hardness tester for all the three set of combinations along with the parent material. The results that were obtained were compared with each other and the best combination was found which in turn may be used by industries for the required application which in turn enhances and ascertains the quality of products.
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TL;DR: A survey of previous work related to the relationship between grain size and corrosion resistance for a number of light metamodel classes can be found in this article, with a focus on the effect of grain size on corrosion.
Abstract: Grain refinement is known to lead to improvements in strength and wear resistance. Inherent processing involved in grain refinement alter both the bulk and the surface of a material, leading to changes in grain boundary density, orientation, and residual stress. Ultimately, these surface changes can have an impact on electrochemical behavior and, consequently, corrosion susceptibility as evidenced by the large number of studies on the effect of grain size on corrosion, which span a range of materials and test environments. However, there has been limited work on developing a fundamental understanding of how grain refinement and more generally how grain size affects the corrosion resistance of an alloy. Existing literature is often contradictory, even within the same alloy class, and a coherent understanding of how grain size influences corrosion response is largely lacking. A survey of previous work related to the relationship between grain size and corrosion resistance for a number of light meta...
873 citations
TL;DR: In this paper, a review of the pertinent literature combined with the authors' works reveals that a relationship exists between corrosion rate and grain size and reveals an important fundamental relationship that can be exploited for material durability and design.
707 citations
TL;DR: In this paper, the effect of microconstituents on the corrosion and electrochemical behaviour of AZ91D alloy prepared by die-casting and ingot casting route has been investigated in 3.5% NaCl solution at pH 7.25.
584 citations
TL;DR: In this article, the microstructural changing and corrosion behavior of magnesium alloy AZ31 after extrusion and severe plastic deformation by ECAE process was compared, and the results showed that the severe plastic deformations affected both the microstructure and the corrosion behavior.
370 citations
TL;DR: In this paper, a discrete effort towards optimization of microstructure for enhanced corrosion resistance by understanding the largely unknown corrosion -grain size relationship for magnesium is presented, which is particularly important for magnesium that commonly displays poor corrosion resistance.
Abstract: This study is a discrete effort towards optimization of microstructure for enhanced corrosion resistance by understanding the largely unknown corrosion - grain size relationship for magnesium. This is particularly important for magnesium that commonly displays poor corrosion resistance. A significant variation in corrosion resistance with grain size exists, which is of key significance; however these trends were strongly dependent upon the specific thermo-mechanical processing route used to prepare the specimens.
255 citations