Stress-Corrosion Cracking Resistance of AMG-5M Alloy Obtained by Nonconsumable-Electrode Argon-Arc Welding and Friction stir Welding

2016 ◽  
Vol 51 (5) ◽  
pp. 682-690 ◽  
Author(s):  
A. G. Poklyatskii ◽  
V. E. Fedorchuk ◽  
M. R. Yavorskaya
Keyword(s):  
Friction Stir Welding ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Arc Welding ◽  
Corrosion Cracking ◽  
Cracking Resistance ◽  
Friction Stir

scholarly journals Stress Corrosion Cracking of Friction Stir Welding (FSW) of AW 5083 and AW 5059 Aluminium Alloys

2020 ◽  
Vol 15 ◽  
Keyword(s):  
Friction Stir Welding ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Scanning Microscope ◽  
Good Resistance ◽  
Friction Stir ◽  
Rate Testing ◽  
Stress Corrosion Resistance ◽  
Resistance To Stress

Friction stir welding (FSW) joints of AW 5083 and AW 5059 alloys were used for the study. Mechanical properties, resistance to stress corrosion cracking (SCC) were investigated and metallographic tests were performed using an optical and scanning microscope (SEM). The parameters of friction welding are also given. Stress corrosion was investigated by the method of slow strain rate testing (SSRT) in air and 4.5% NaCl aqueous solution. During SCC tests elongation, strength, fracture energy and time to break were measured. Very good strength of the tested alloys was found with good resistance to stress corrosion cracking. The aim of the study was to determine the possibility of using the AW 5059 and AW 5083 friction welded (FSW) alloys in marine structures, using stress corrosion resistance as a criterion

Effect of Friction Stir Welding on Pitting and Stress Corrosion Cracking Behavior of AFNOR7020-T6 Aluminium Alloy

2018 ◽  
Vol 54 (5) ◽  
pp. 866-875
Author(s):  
G. Srinivasa Rao ◽  
K. Srinivasa Rao ◽  
P. Srinivasa Rao ◽  
S. R. Koteswara Rao ◽  
G. Madhusudan Reddy
Keyword(s):  
Friction Stir Welding ◽  
Aluminium Alloy ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Cracking Behavior ◽  
Friction Stir

scholarly journals Stress Corrosion Cracking of Friction Stir-Welded AA-2024 T3 Alloy

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2610 ◽  
Author(s):  
Marina Cabrini ◽  
Sara Bocchi ◽  
Gianluca D'Urso ◽  
Claudio Giardini ◽  
Sergio Lorenzi ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Strain Rate ◽  
Stress Corrosion ◽  
Base Metal ◽  
Stress Corrosion Cracking ◽  
Heat Affected Zone ◽  
Corrosion Cracking ◽  
Slow Strain Rate ◽  
Friction Stir ◽  
Aa 2024

The paper is devoted to the study of stress corrosion cracking phenomena in friction stir welding AA-2024 T3 joints. Constant load (CL) cell and slow strain rate (SSR) tests were carried out in aerated NaCl 35 g/L solution. During the tests, open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) were measured in the different zones of the welding. The results evidenced initial practical nobilty of the nugget lower compared to both heat-affected zone and the base metal. This effect can be mainly ascribed to the aluminum matrix depletion in copper, which precipitates in form of copper-rich second phases. In this zones, no stress corrosion cracking was noticed, but well-evident stress-enhanced intergranular corrosion occurred. This is due to the uneven distribution of platic deformation during the slow strain rate tests. Higher strain values are localized at the heat affected zone, where softening occurs. On the contrary, stress values at the nugget are not sufficient to favor both the initiation and propagation of stress corrosion cracks. In the range of processing parameter studied in this experimental work, the stress corrosion cracking susceptibility of the friction stir welding (FSW)-ed alloy is then similar to that of the base metal.

An insight into the stress corrosion cracking resistance of friction stir processed and micro arc oxidation coated ZE41 grade magnesium alloy

2020 ◽  
pp. 095440622092031
Author(s):  
Koganti Radhika ◽  
AK Lakshminarayanan
Keyword(s):  
Stress Corrosion ◽  
Base Metal ◽  
Stress Corrosion Cracking ◽  
Friction Stir Processing ◽  
Corrosion Cracking ◽  
Cracking Resistance ◽  
Friction Stir ◽  
Micro Arc Oxidation ◽  
T Phase ◽  
Metal Friction

The stress corrosion cracking behavior of friction stir processed, micro arc oxidation coated and a composite coated (friction stir processed-micro arc oxidation) ZE41 magnesium alloy were studied in modified simulated body fluid (m-SBF) solution at room temperature. Friction stir processing was carried out with a tool rotation speed of 650 rpm and a traverse speed of 50 mm/min. The results showed that fine equi-axed grain structure with an average grain size of ∼2.8 µm, fragmentation, and partial dissolution of T-phase and Zr-rich particles was achieved through friction stir processing. Specially designed two electrode coating method was adopted to produce samples with micro arc oxidation coating in silicate solution. The stress corrosion cracking susceptibility of base metal, friction stir processed, micro arc oxidation, and composite coated friction stir processed-micro arc oxidation samples were evaluated through constant load testing at five different stress levels. The results indicated higher stress corrosion cracking susceptibility for base metal compared to friction stir processed; micro arc oxidation and friction stir processed-micro arc oxidation samples. Grain refinement and microstructure homogenization enhanced stress corrosion cracking resistance of friction stir processed sample whereas the barrier effect of coating during initial stages of corrosion improved stress corrosion cracking resistance of micro arc oxidation sample compared to base metal. Among all the samples, friction stir processed-micro arc oxidation exhibited superior stress corrosion cracking resistance due to the self-repairing mechanism of friction stir processing, which in turn improved the corrosion resistance of micro arc oxidation layer. The fractographic features revealed different stress corrosion cracking mechanisms for base metal, friction stir processed, micro arc oxidation, and friction stir processed-micro arc oxidation samples. T-phase and Zr-rich particles played major role in the initiation of corrosion pits and resulted in stress corrosion cracks.

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