M23C6 precipitation and Si segregation promoted by deep cryogenic treatment aggravating pitting corrosion of supermartensitic stainless steel

2021 ◽  
Author(s):  
Xiao He ◽  
Xin-yang Lü ◽  
Zhi-wei Wu ◽  
Shao-hong Li ◽  
Qi-long Yong ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Pitting Corrosion ◽  
Cryogenic Treatment ◽  
Deep Cryogenic Treatment ◽  
Supermartensitic Stainless Steel

Pitting Corrosion of Supermartensitic Stainless Steel in Chloride Solutions Containing Thiosulfate or H2S

2018 ◽  
Vol 27 (7) ◽  
pp. 3723-3730 ◽  
Author(s):  
Mônica M. A. M. Schvartzman ◽  
D. R. Lopes ◽  
L. Esteves ◽  
W. R. C. Campos ◽  
V. F. C. Lins
Keyword(s):  
Stainless Steel ◽  
Pitting Corrosion ◽  
Chloride Solutions ◽  
Supermartensitic Stainless Steel

scholarly journals Electrochemical Impedance Analysis on Cryogenically Treated Dissimilar Metal Welding of 316L Stainless Steel and Monel 400 Alloy Using GTAW

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1088 ◽  
Author(s):  
Cherish Mani ◽  
R Karthikeyan ◽  
Sathish Kannan
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Welded Joints ◽  
Electrochemical Impedance ◽  
Cryogenic Treatment ◽  
Impedance Analysis ◽  
Oil Refining ◽  
Deep Cryogenic Treatment ◽  
Dissimilar Metal ◽  
Monel 400

An attempt was made to study the corrosion behavior of austenitic stainless-steel SS 316L/Monel 400 alloy dissimilar metal welded joints using gas tungsten arc welding. This combination of welded joints is used in re-heaters and heat exchangers in gas processing and oil refining industries. The welded specimens were subjected to post-weld treatments, such as annealing and deep cryogenic treatment. The welded specimens were sectioned into five different parts: SS 316L base, SS 316L HAZ, weld, Monel HAZ, and Monel base. The polarization method and electrochemical impedance analysis were used to analyze the corrosion resistance in a NaCl solution. A polarization graph, Nyquist plot, and Bode plot were constructed for all regions, separately, for the heat-treated and cryo-treated specimens, to analyze the variation in corrosion resistance in different regions, and then the results were compared. To validate the results of electrochemical impedance analysis, scanning electron microscope (SEM) and energy dispersive spectroscope (EDS) analyses were also performed. The results indicated that the cryo-treated specimens have better corrosion resistance when compared to the annealed ones. Weld region on both specimens exhibited better corrosion resistance when compared to other zones.

Study of the Effect of DCT and PVD Treatments on the Fatigue Behaviour of AISI 302 Stainless Steel

2009 ◽  
Vol 417-418 ◽  
pp. 49-52 ◽  
Author(s):  
Paolo Baldissera ◽  
Stefano Cavalleri ◽  
Paolo Marcassoli ◽  
Federico Tordini
Keyword(s):  
Stainless Steel ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Cryogenic Treatment ◽  
Fatigue Behaviour ◽  
Combined Effects ◽  
Deep Cryogenic Treatment ◽  
Bending Tests ◽  
Standard Specimens ◽  
Rotating Bending

In this paper the influence of DCT (Deep Cryogenic Treatment) and a CrN arc-deposited PVD (Physical Vapor Deposition) coating on the fatigue behaviour of AISI 302 stainless steel was studied. Rotating bending tests were carried out on standard specimens to evaluate the fatigue limit at 300000 load cycles. The single and the combined effects of the two treatments were investigated by addressing untreated, PVD-coated and both PVD-coated and DC-treated specimens to the tests. All the series of specimens were also tested statically and laboratory analyses including fracture surface SEM observations and hardness measurements were performed.

Deep Cryogenic Treatment: Effects on Mechanical Properties of AISI 302 Stainless Steel and 18NiCrMo5 Carburized Steel

2009 ◽  
Vol 417-418 ◽  
pp. 793-796 ◽  
Author(s):  
Paolo Baldissera ◽  
Cristiana Delprete
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Tensile Properties ◽  
Fatigue Resistance ◽  
Cryogenic Treatment ◽  
Surface Hardness ◽  
Fatigue Behaviour ◽  
Structural Components ◽  
Deep Cryogenic Treatment ◽  
Carburized Steel

In this paper, the influence of deep cryogenic treatment (DCT) on mechanical properties of two commercial steels is analysed. Hardened AISI 302 stainless steel and 18NiCrMo5 carburized steel specimens were subjected to DCT after standard treatments. For both materials, the fatigue behaviour is a key property considering their usual applications requirements. Surface hardness, tensile properties and axial fatigue resistance of both materials were measured and compared with and without DCT. From the analysis of the experimental results and from their interpretation in the light of the previous literature, some useful indications are obtained about the DCT potential fallout on design and construction of structural components.

Effect of Chloric Ions and Temperature on the Pitting Corrosion Behavior of Supermartensitic Stainless Steel in CO2-Saturated Chloride Solution

2012 ◽  
Vol 538-541 ◽  
pp. 2342-2345
Author(s):  
Jun Li ◽  
Dong Ye ◽  
Yong Mei Chen ◽  
Jie Su ◽  
Kun Yu Zhao
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Pitting Corrosion ◽  
Chloride Solution ◽  
Polarization Measurement ◽  
Ion Concentration ◽  
Pitting Potential ◽  
Supermartensitic Stainless Steel ◽  
Different Temperatures ◽  
Logarithmic Relation

Abstract. The pitting corrosion behavior of two kinds (W and Cu-free; W and Cu-bearing) of supermartensitic stainless steels (SMSS) were studied in CO2-saturated chloride solution with three chloric ion concentration: 21200, 50000, 100000ppm, and four different temperatures:19, 40, 60, 80°C by potentiodynamic polarization measurement. The results indicate that the pitting potential decreased with temperature increasing, and in a logarithmic relation with the chlorine concentration in both alloys. The pitting potential of supermartensitic stainless steel is increased by together adding tungsten and copper.

Deep-Cryogenic Treatment and Effect of Austenizing Temperature on Tribological Performance of P/M High-Speed Steel

2008 ◽  
Author(s):  
B. Podgornik ◽  
V. Leskovsˇek ◽  
J. Vizˇintin
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
High Speed ◽  
Cryogenic Treatment ◽  
High Speed Steel ◽  
Tribological Performance ◽  
Abrasive Wear Resistance ◽  
Deep Cryogenic Treatment ◽  
Reciprocating Sliding

The aim of our work was to investigate the influence of deep-cryogenic treatment parameters (treatment time and temperature) and austenizing temperature on the tribological performance of powder-metallurgy (P/M) high-speed steel. Special emphasis was put on abrasive wear resistance and resistance to galling under dry sliding conditions. Abrasive wear resistance was tested under reciprocating sliding conditions using alumina ball, while galling resistance against austenitic stainless steel was determined in a load-scanning test rig. Tribological test were evaluated in terms of high-speed steel wear volume, coefficient of friction under reciprocating sliding, friction variation with load, and critical load for galling initiation and stainless steel transfer layer formation.

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