scholarly journals Corrosion of Cast Aluminum Alloys: A Review

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1384
Author(s):  
C. Berlanga-Labari ◽  
M. V. Biezma-Moraleda ◽  
Pedro J. Rivero
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloys ◽  
Eutectic Silicon ◽  
Protective Effects ◽  
Cast Aluminum ◽  
Cast Aluminum Alloys ◽  
Aluminum Cast Alloys ◽  
Cast Alloys ◽  
Semi Solid ◽  
Plasma Electrolytic

Research on corrosion resistance of cast aluminum alloys is reviewed in this article. The effect of the main microstructural features of cast aluminum alloys such as secondary dendrite arm spacing (SDAS), eutectic silicon morphology, grain size, macrosegregation, microsegregation, and intermetallic compounds is discussed. Moreover, the corrosion resistance of cast aluminum alloys obtained by modern manufacturing processes such as semi-solid and additive manufacturing are analyzed. Finally, the protective effects provided by different coatings on the aluminum cast alloys—such as anodized, plasma electrolytic oxidation (PEO), and laser—is reviewed. Some conclusions and future guidelines for future works are proposed.

FATIGUE STRENGTH IMPROVEMENT BY PEENING TREATMENT IN DEGASSING PROCESSED CAST ALUMINUM ALLOYS

2006 ◽  
Vol 20 (25n27) ◽  
pp. 3593-3598 ◽  
Author(s):  
YASUO OCHI ◽  
KIYOTAKA MASAKI ◽  
TAKASHI MATSUMURA ◽  
YOHEI KUMAGAI ◽  
TATSUHIKO HAMAGUCHI ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Aluminum Alloys ◽  
Shot Peening ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Laser Peening ◽  
Cast Aluminum ◽  
Cast Aluminum Alloys ◽  
Rotating Bending Fatigue ◽  
Cast Alloys

Rotating bending fatigue tests were carried out in order to investigate effects of shot peening and laser peening treatment on fatigue properties of degassing processed cast aluminum alloys. Degassing was useful for decreasing cast defects and increasing the range of fatigue life and fatigue strength at 107 cycles compared with those of non-degassed cast alloys. The shot peening and the laser peening treatments also showed remarkable effects for increasing the resistance of crack propagation behaviors and improving the fatigue strength of the degassing processed cast aluminum alloys.

Fatigue Behavior of Semi-Solid Cast Aluminum: A Critical Review

2008 ◽  
Vol 141-143 ◽  
pp. 725-730 ◽  
Author(s):  
Myriam Brochu ◽  
Yves Verreman ◽  
Frank Ajersch ◽  
Laurent Bucher
Keyword(s):  
Aluminum Alloys ◽  
High Performance ◽  
Fatigue Behavior ◽  
Casting Process ◽  
Cast Aluminum ◽  
The North ◽  
Cast Aluminum Alloys ◽  
High Integrity ◽  
Semi Solid ◽  
Permanent Mold Castings

Aluminum alloys are increasingly used in automotive and aeronautic applications to produce high performance, lightweight parts. Among the reasons for this, is the emergence of high integrity processes (HIP), which widens the field of application for cast aluminum alloys. In fact, metallurgical quality and consistency that characterize components produced by HIP are necessary for critical safety components. In addition to attaining maximum strength, critical safety components need to be ductile and resistant to cyclic loading. According to the North American Die Casting Association, rheocasting is a high integrity process capable of producing parts with fewer defects than conventional casting process. Rheocast components are known to have better mechanical properties than permanent mold castings. Moreover, they can be heat-treated which is impractical in the case of classical die cast components. However, the fatigue behavior of rheocast aluminum alloys has been investigated since about 2000 and few results have been published on this subject. This paper reviews the studies of fatigue behavior of aluminum semi-solid cast components. Published experimental results on high cycle fatigue resistance (S-N diagrams), long crack propagation, crack closure effects and short crack particularities are presented.

scholarly journals Surface Modification of Aluminum 6061-O Alloy by Plasma Electrolytic Oxidation to Improve Corrosion Resistance Properties

Coatings ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 4
Author(s):  
Dmitry V. Dzhurinskiy ◽  
Stanislav S. Dautov ◽  
Petr G. Shornikov ◽  
Iskander Sh. Akhatov
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Plasma Electrolytic Oxidation ◽  
Electrochemical Impedance ◽  
High Strength ◽  
Electrolytic Oxidation ◽  
Coating Layers ◽  
Plasma Electrolytic ◽  
High Strength Aluminum Alloys

In the present investigation, the plasma electrolytic oxidation (PEO) process was employed to form aluminum oxide coating layers to enhance corrosion resistance properties of high-strength aluminum alloys. The formed protective coating layers were examined by means of scanning electron microscopy (SEM) and characterized by several electrochemical techniques, including open circuit potential (OCP), linear potentiodynamic polarization (LP) and electrochemical impedance spectroscopy (EIS). The results were reported in comparison with the bare 6061-O aluminum alloy to determine the corrosion performance of the coated 6061-O alloy. The PEO-treated aluminum alloy showed substantially higher corrosion resistance in comparison with the untreated substrate material. A relationship was found between the coating formation stage, process parameters and the thickness of the oxide-formed layers, which has a measurable influence on enhancing corrosion resistance properties. This study demonstrates promising results of utilizing PEO process to enhance corrosion resistance properties of high-strength aluminum alloys and could be recommended as a method used in industrial applications.

Possibilities to Apply Friction Stir Processing FSP in Surface Engineering

2021 ◽  
Vol 890 ◽  
pp. 56-65
Author(s):  
Cristian Ciucă ◽  
Lia Nicoleta Boțilă ◽  
Radu Cojocaru ◽  
Ion Aurel Perianu
Keyword(s):  
Aluminum Alloys ◽  
Friction Stir Processing ◽  
Surface Engineering ◽  
Copper Alloys ◽  
Welding Process ◽  
Industrial Applications ◽  
Process Conditions ◽  
Cast Aluminum ◽  
Friction Stir ◽  
Cast Aluminum Alloys

The results obtained by ISIM Timisoara to the development of the friction stir welding process (FSW) have supported the extension of the researches on some derived processes, including friction stir processing (FSP). The experimental programs (the researches) were developed within complex research projects, aspects regarding the principle of the process, modalities and techniques of application, experiments for specific applications, being approached. The paper presents good results obtained by friction stir processing of cast aluminum alloys and copper alloys. The optimal process conditions, optimal characteristics of the processing tools were defined. The complex characterization of the processed areas was done, the advantages of the process applying being presented, especially for the cast aluminum alloys: EN AW 4047, EN AW 5083 and EN AW 7021. The characteristics of the processed areas are compared with those of the base materials. The results obtained are a solid basis for substantiating of some specific industrial applications, especially in the automotive, aeronautical / aerospace fields.

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