Effects of Solid Solution Treatment and Rolling Treatment on Electrochemical Properties of Al Anode Alloy

2013 ◽  
Vol 800 ◽  
pp. 492-495
Author(s):  
Deng Hui Li ◽  
Jiu Ba Wen ◽  
Jun Guang He
Keyword(s):  
Solid Solution ◽  
Corrosion Resistance ◽  
Electrochemical Properties ◽  
Hydrogen Evolution ◽  
Open Circuit Potential ◽  
Cast Alloy ◽  
Solution Treatment ◽  
Open Circuit ◽  
Electrochemical Measurements ◽  
Solid Solution Treatment

Effects of solid solution treatment and rolling treatment on microstructure and electrochemical properties of Al-Ga-Mg-Mn-Bi anode alloy were investigated by means of SEM and electrochemical measurements. The results show that after solid solution treatment the microstructure segregation of the as-cast alloy was reduced, the hydrogen evolution was restrained, the corrosion resistance was increased. The open circuit potential moves towards negative after solid solution treatment. Rolling treatment had little impact on the alloy. The effects of solid solution treatment were superior to rolling treatment.

Effect of heat treatment on structure and properties of GTAW and laser beam welded super-duplex stainless steel joints

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040061 ◽  
Author(s):  
Kai Qi ◽  
Guangjin Wang ◽  
Yunxue Jin ◽  
Jiayang Gu ◽  
Zhongyu Zhang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Impact Toughness ◽  
Laser Beam ◽  
Duplex Stainless Steel ◽  
Solution Treatment ◽  
Solid Solution Treatment ◽  
Pitting Corrosion Resistance ◽  
The Impact

Duplex stainless steel, consisting of ferrite and austenite, has good corrosion resistance and is often used in harsh marine environments. In this paper, welding on SAF2507 duplex stainless steel with 5 mm thickness was finished by laser beam welding (LBW) and gas tungsten arc welding (GTAW). The post-weld solid solution treatment was also conducted at temperature of [Formula: see text]C followed with cooling by water after 1 h. The results showed that both LBW and GTAW could produce well-produced welds. The microstructures of the welds were composed of ferrite and austenite phases. After solid solution treatment at [Formula: see text]C, the two-phase structure of LBW joint became uniform, while [Formula: see text] phase was produced in GTAW joint. The impact test of welded joints at room-temperature was carried out. After solid solution treatment at [Formula: see text]C, the impact toughness of LBW joints obviously increased, but the impact toughness of GTAW joint decreased with the fracture morphology of brittle mode. The electrochemical experiments on the welded joints showed that the pitting corrosion resistance of LBW joints improved after solid solution treatment, while the pitting corrosion resistance of GTAW joints decreased.

scholarly journals On the microstructure and mechanical properties of silver-bearing antibacterial CD4MCu duplex stainless steels: Solid solution temperature

2019 ◽  
Vol 9 (9) ◽  
pp. 1067-1075
Author(s):  
Hongliang Xiang ◽  
Dong Liu ◽  
Xueping Chen ◽  
Huatang Cao ◽  
Xuanpu Dong
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Volume Fraction ◽  
Antibacterial Properties ◽  
Solution Treatment ◽  
Solution Temperature ◽  
Ion Release ◽  
Solid Solution Treatment

The Ag-bearing antibacterial stainless steel has attracted substantial attention in the field of bacterial proliferation prevention. In this study, a Cu–Ag alloy was incorporated into a CD4MCu duplex stainless steel (DSS) to produce a good antibacterial property. The Ag-bearing CD4MCu duplex stainless steel samples were conducted solid solution treatment at various temperatures. The effects of the solid solution temperature on the microstructure, mechanical and corrosion properties, as well as silver ion release characteristics and antibacterial properties were investigated. Results show that apart from the original α, γ phases, Ag-bearing phases were formed in all samples after solid solution at different temperatures. The volume fraction of α and Ag-bearing phases decrease with increasing solution temperature. The tensile strength, hardness, elongation, and corrosion resistance first decrease and then increase along with the increase in the solid solution temperature. The heat treatment conducted at 1150 °C increases the strength, the hardness, the pitting corrosion resistance, and the antimicrobial capability simultaneously. The antibacterial rates of all the Ag-bearing CD4MCu duplex stainless steel samples after solid solution treatment are above 99%, indicating their good anti-bacterial capabilities.

scholarly journals Development of Hot-Extruded Mg–RE–Zn Alloy Bar with High Mechanical Properties

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1722 ◽  
Author(s):  
Zehua Li ◽  
Jinghuai Zhang ◽  
Yan Feng ◽  
Jinshu Xie ◽  
Yinfu Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Elevated Temperature ◽  
Basal Plane ◽  
Cast Alloy ◽  
Solution Treatment ◽  
Hot Extrusion ◽  
Tensile Yield Strength ◽  
Elevated Temperature Strength ◽  
Solid Solution Treatment

A new elevated-temperature high-strength Mg–4Er–2Y–3Zn–0.4Mn (wt %) alloy was developed by semi-continuous casting, solid solution treatment, and hot extrusion. W phase (Mg3(Er,Y)2Zn3) with fcc structure, long period stacking ordered phases with 18R (Mg10(Er,Y)1Zn1) and 14H (Mg12(Er,Y)1Zn1) structures, and basal plane stacking faults (SFs) was formed in the as-cast alloy, mainly due to the alloy component of (Er + Y)/Zn = 1:1 and Er/Y = 1:1 (at %). After solid solution treatment and hot extrusion, the novel microstructure feature formed in as-extruded alloy is the high number-density nanospaced basal plane SFs throughout all the dynamically recrystallized (DRXed) and un-DRXed grains, which has not been previously reported. The as-extruded alloy exhibits superior tensile properties from room temperature to 300 °C. The tensile yield strength can be maintained above 250 MPa at 300 °C. The excellent elevated-temperature strength is mainly ascribed to the formation of nanospaced basal plane SFs throughout the whole Mg matrix, fine DRXed grains ~2 μm in size, and strongly basal-textured un-DRXed grains with profuse substructures. The results provide new opportunities for the development of deformed Mg alloys with satisfactory mechanical properties for high-temperature services.

Effects of the Welding Process on Mechanical Properties and Corrosion Resistance of 2205 Duplex Stainless Steel

2011 ◽  
Vol 189-193 ◽  
pp. 1212-1217 ◽  
Author(s):  
Lian Zheng Ding ◽  
Qing Sen Meng ◽  
Zhong Wei Yang ◽  
Gang Wang
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Solution Treatment ◽  
Inert Gas ◽  
2205 Duplex Stainless Steel ◽  
Solid Solution Treatment ◽  
Welding Processes

In this study, welding of 2205 duplex stainless steel was carried out by first using plasma arc welding as root welding and then using tungsten inert-gas (TIG) welding and metal inert-gas (MIG) welding respectively as cover welding, Weldability of 2205 duplex stainless steel using two different the welding processes is investigated. Microstructure characteristics, mechanical properties, pitting corrosion resistance are made comparison between the weldment that is solution treated and that is not .Influence of heat input and the solid solution treatment on complex properties of welded joints is evaluated, and the solid solution treatment was conducted for both of the welded joints fabricated by the welding processes mentioned preciously.

scholarly journals Investigation of the Effect of Heat Treatment on the Microstructures and Mechanical Properties of Al-13Si-5Cu-2Ni Alloy

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 688
Author(s):  
Zhi-Fa Wang ◽  
Tian-Jing Miao ◽  
Shu-Qing Kou ◽  
Shuang Zhang ◽  
Feng Qiu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Cast Alloy ◽  
Eutectic Silicon ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Solution Treatment Temperature ◽  
Solid Solution Treatment ◽  
Microstructures And Mechanical Properties

An experimental investigation was carried out to study the effects of solid solution treatment and aging treatment on the microstructures and mechanical properties of an Al-13Si-5Cu-2Ni alloy. The results show that the size of eutectic silicon decreased with solid solution treatment temperature increasing until 510 °C. Subsequently, the eutectic silicon size continued to increase as the temperature increased to 520 °C. Initially, the acicular eutectic silicon of the as-cast alloy was 10.1 μm in size. After the solid solution treatment at 510 °C, the eutectic silicon size was reduced to 6.5 μm. The θ′ phase is the main strengthening phase in the alloy, therefore, the effect of aging treatment on θ′ phases was explored. As the aging time increased, the diameter, length, and fraction volume of the θ′ phases were found to increase. The main reason for the improved performance of this alloy following heat treatment is the passivation spheroidization of the silicon phase and Orowan strengthening due to the θ′ phases. The optimal tensile strength of an Al-13Si-5Cu-2Ni alloy was obtained after solid solution treatment at 510 °C for 8 h followed by an aging treatment at 165 °C for 8 h. Therefore, this work has great significance for promoting the application of Al alloys at high temperatures.

scholarly journals Corrosion and Electrochemical Properties of Nanocrystalline W-Mo Alloys in NaOH Solutions

1970 ◽  
Vol 11 ◽  
pp. 147-152
Author(s):  
Arun Khadka ◽  
Jagadeesh Bhattarai
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Properties ◽  
Open Circuit Potential ◽  
Science And Technology ◽  
Open Circuit ◽  
Sputter Deposition ◽  
Corrosion Tests ◽  
Corrosion Rates ◽  
Sputter Deposited ◽  
The Stability

The corrosion and electrochemical properties of sputter-deposited nanocrystalline binary W-Mo alloys were studied after immersion for 2429 h in different concentrations of NaOH solutions open to air at 25°C using corrosion tests and open circuit potential measurements. Molybdenum acts synergistically with tungsten in enhancing the corrosion resistance of the sputter-deposited binary W-Mo alloys so as to show higher corrosion resistance than those of alloy-constituting elements (i.e. tungsten and molybdenum) after immersion for 24 h in NaOH solutions. Open circuit potentials of all the examined sputter-deposited W-Mo alloys are shifted to the more positive (noble) direction with increasing molybdenum content in the alloys. The stability of the spontaneously passivated films formed on the binary W-Mo alloys is decreased with increasing concentrations of NaOH solutions. In spite of these facts, the corrosion rates of all the examined W-Mo alloys are almost independent of concentrations of NaOH solutions after immersion for 24 h at 25°C.Key words: nanocrystalline W-Mo alloys; sputter deposition; corrosion resistance; open circuit potential; NaOH solutions DOI: 10.3126/njst.v11i0.4137Nepal Journal of Science and Technology 11 (2010) 147-152

scholarly journals The Effects of Chromium and Nickel on the Passivation Behaviour of Sputter-Deposited W-Cr-Ni Alloys in 12 M HCl Solution

1970 ◽  
Vol 7 (7) ◽  
pp. 24-28
Author(s):  
Jagadesh Bhattarai
Keyword(s):  
Corrosion Resistance ◽  
Open Circuit Potential ◽  
Hydrogen Reduction ◽  
Open Circuit ◽  
Electrochemical Measurements ◽  
Corrosion Resistant ◽  
Ni Alloys ◽  
Scientific World ◽  
Sputter Deposited ◽  
Hcl Solution

The passivity of sputter-deposited ternary W-Cr-Ni alloys is investigated by immersion tests and electrochemical measurements in 12 M HCl solution at 30°C, open to air. Particular attention is paid to the effects of alloying elements to the corrosion behavior. All the examined amorphous or/and nanocrystalline W-Cr-Ni alloys are passivated spontaneously even in an aggressive environment of 12 M HCl, and hence these alloys showed higher corrosion resistance than those of alloyconstituting elements. The chromium addition suppresses the anodic dissolution current because of the formation of tetravalent chromium oxyhydroxide having a relatively high activity for both cathodic oxygen and hydrogen reduction with a consequent ennoblement of the open circuit potential. The ennoblement of the open circuit potential leads to the formation of the passive chromium oxyhydroxide film. It is, therefore, considered that the addition of chromium improves synergistically the corrosion resistance and passivating abilities of the sputter-deposited binary W-Ni alloys in 12 M HCl solution. Keywords: Sputter-deposition; Ternary W-Cr-Ni alloys; Corrosion-resistant; Electrochemical measurements. DOI: 10.3126/sw.v7i7.3819 Scientific World Vol.7(7) 2009 pp.24-28

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