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.

Effect of Solid Solution Treatment on Corrosive Action of 00Cr26Ni5Mo2Cu3Re Duplex Stainless Steel in Acid Stage

2011 ◽  
Vol 335-336 ◽  
pp. 566-570
Author(s):  
Hong Pu Zhao ◽  
Shun Xing Wang
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
High Temperature ◽  
Low Temperature ◽  
Acid Solution ◽  
Duplex Stainless Steel ◽  
Solution Treatment ◽  
Solution Temperature ◽  
Solid Solution Treatment ◽  
Corrosive Resistance

Effect of solid solution treatment on corrosive behavior of 00Cr26Ni5Mo2Cu3Re Duplex Stainless Steel in static stage of HNO3+HF acid solution is studied in the paper.The results show that the corrosion between phases and pitting corrosion on ferrite are serious at low temperature ,the phenomenon gradually disappear with the solid solution temperature rising ; the corrosive resistance of 00Cr26Ni5Mo2Cu3Re is getting better first and then decrease with solution temperature at high temperature, the best corrosive resistance temperature is at 1050°C.

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.

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.

Investigation on mechanical, corrosion resistance and antibacterial properties of Cu-bearing 2205 duplex stainless steel by solution treatment

RSC Advances ◽  
2016 ◽  
Vol 6 (114) ◽  
pp. 112738-112747 ◽  
Author(s):  
Jinlong Zhao ◽  
Chunguang Yang ◽  
Dawei Zhang ◽  
Ying Zhao ◽  
M. Saleem Khan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Antibacterial Properties ◽  
Solution Treatment ◽  
2205 Duplex Stainless Steel ◽  
Antibacterial Performance ◽  
Solution Treated ◽  
Mechanical Properties And Corrosion

Solution treated 2205-Cu DSS with strong antibacterial performance against M. salsuginis showed appropriate mechanical properties and corrosion resistance.

Effect of Thermal Cycle on Microstructure and Corrosion Behavior of Duplex Stainless Steel SAF 2205 Electron Beam Welded Joint

2018 ◽  
Vol 786 ◽  
pp. 119-127
Author(s):  
Sameh M. Khafagy ◽  
Morsy Amin Morsy ◽  
H.M. El Sherbini ◽  
Y.F. Barakat
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Thermal Cycle ◽  
Welded Joint ◽  
Volume Fraction ◽  
Holding Time ◽  
Σ Phase ◽  
Phase Volume Fraction ◽  
Saf 2205

It is known that heat treatment (HT) highly affects the properties of base metal (BM) and fusion zones (FZ) of duplex stainless steel (DSS). In fact, it may give unwanted structure changes. Duplex stainless steels SAF 2205 welded joint was subjected to thermal cycle at temperature of 850◦C at holding times 1, 3, 5 and 7 hours. The influence of heating cycles and concentration of corrosive medium on the corrosion properties and microstructure of 2205 alloy was the objective of this work. It was found that process led to noticeable decrease in the corrosion resistance of BM and FZ specimens; moreover the decrease was large in BM than FZ. It was also found that sigma phase (σ) precipitated in the different zones of the structure. σ phase volume fraction was found to increase with increasing the holding time of HT, and its increase is larger in BM. Corrosion resistance was found to be oppositely related to σ phase formation. Secondary austenite phase (γ2) was also precipitated and its volume fraction in FZ was found to increase with increasing the holding time of HT and decreased in BM.

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.

Microstructure Characterization of Duplex Stainless Steel Welding Joint with Different Solution and Aging Treatment

2010 ◽  
Vol 658 ◽  
pp. 376-379
Author(s):  
Jun Yang ◽  
Tuo Yan Zhang ◽  
Jun Hui Yu ◽  
Wei Zhang ◽  
Jiao Li
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Volume Fraction ◽  
Optical Microscope ◽  
Austenite Phase ◽  
Ferrite Phase ◽  
Solution Temperature ◽  
Eutectoid Reaction ◽  
Σ Phase ◽  
Stainless Steel Welding

The microstructural evolutions of 2205 duplex stainless steel welding joints were investigated in this paper. The specimens were solution treated at 1100°C and 1200°C for 1 h, water quenched and then isothermal aged for various durations at 850°C, followed by water cooling. The volume fraction of ferrite phase in HAZ, weld and base metal of the steel were measured by the ferrite scope detector. The changes of microstructure in sigma (σ) phase, ferrite and austenite phase were analyzed by optical microscope and energy dispersive spectrum. The results show that the volume fraction of ferrite phase increases and the ferrite grain becomes coarse when solution temperature enhances from 1100°C to 1200°C. During the aging, σ phase precipitates at γ/δ phase boundary and grows into the ferrite phase, and a eutectoid reaction of δ→σ+γ2 occurs. With extending of the aging time, the amount of ferrite phase decreases, σ phase increases and thin needle secondary austenite phase distributes across ferrite grains. In addition, high solution temperatures can delay the procedure of σ phase precipitation.

Effect of Solution Temperature on Microstructure of 2205 Duplex Stainless Steel Welded Joints

2010 ◽  
Vol 658 ◽  
pp. 432-435
Author(s):  
Yuan Yuan Qiao ◽  
De Ning Zou ◽  
Jiao Li ◽  
Ying Han
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Arc Welding ◽  
Solution Treatment ◽  
Optical Microscope ◽  
Solution Temperature ◽  
2205 Duplex Stainless Steel ◽  
Manual Arc Welding ◽  
Temperature Solution ◽  
Steel Joints

The various temperature solution experiments were carried out in this paper, which for 2205 duplex stainless steel joints welded by manual arc welding. The evolutions of microstructure in pre/post solution treatment and the contents of ferrite phase were conducted by using optical microscope and ferrite scope detector. The analysis results in the welded, the heat affected and the base metal regions show that suitable solution treatment is effective to adjust the welded microstructure condition. The austenite in each region transformed into ferrite when the temperature enhanced from 1050 to 1200°C. This resulted in increasing the volume of ferrite and coarsening the grain. All microstructure characteristics of the three regions were taken into account, it deduced that the feasible solution temperature range was 1050~1100°C for 2205 duplex stainless steel welded joint.

scholarly journals Effect of Solution Treatment Temperature on Microstructural Evolution, Precipitation Behavior, and Comprehensive Properties in UNS S32750 Super Duplex Stainless Steel

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1481
Author(s):  
Junhe Li ◽  
Wei Shen ◽  
Ping Lin ◽  
Fuming Wang ◽  
Zhanbing Yang
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Solution Treatment ◽  
Element Distribution ◽  
Treatment Temperature ◽  
Solution Treatment Temperature ◽  
Super Duplex Stainless Steel ◽  
Σ Phase ◽  
Comprehensive Properties

The changes of microstructures, element distribution, and comprehensive properties were studied to explore their interactions with each other, induced by solution treatment of UNS S32750 super duplex stainless steel. The results showed that the ferrite content improved, while the austenite content declined as the temperature increased. From 900 to 1000 °C, the σ phase existing at α/γ grain boundaries and in ferrite grains gradually dissolved. At 1050 °C, the microstructures consisted of only ferrite and austenite. From 1050 to 1300 °C, the Cr2N precipitated in ferrite and gradually grew and coarsened. The impact energy and pitting potential of UNS S32750 first improved and then weakened, while the hardness is the opposite, owing to the combined effects of element distribution, microstructures, and precipitates. In the presence of the σ phase, the corrosion resistance and mechanical properties of UNS S32750 correspond directly to the σ phase fraction. Subsequently, the rise in temperature promoted γ → α phase transformation, and the elements partitioning ratios of Cr and Mo declined, resulting in reduced toughness and corrosion resistance and a rise in hardness. Consequently, when the solution treatment temperature is 1050 °C, the α/γ ratio of UNS S32750 approached 1:1, with excellent overall properties.

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