The Mechanical Behavior of a 25Cr Super Duplex Stainless Steel at Elevated Temperature

Lasebikan, Bamidaley Ademola; Akisanya, Alfred Rotimi; Deans, W.F.

doi:10.1007/s11665-012-0273-5

Cited by 13 publications

(13 citation statements)

References 19 publications

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“…The volume fractions of carbides, austenite and ferrite predicted through Thermo-Calc software showed consistent results with experimental fractions of the phases obtained in alloy structure [15]. Many research works have reported the effects of heat treatment on the impact of strength, corrosion and microstructure features of DSS [11,17]. Pressurized fluid flow pipes, tubes, pumps, transmitters, etc.…”

Section: Introductionsupporting

confidence: 61%

Dry Sliding Wear Behavior of Super Duplex Stainless Steel AISI 2507: a Statistical Approach

Davanageri

Narendranath

Kadoli

2016

Archives of Foundry Engineering

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The dry sliding wear behavior of heat-treated super duplex stainless steel AISI 2507 was examined by taking pin-on-disc type of wear-test rig. Independent parameters, namely applied load, sliding distance, and sliding speed, influence mainly the wear rate of super duplex stainless steel. The said material was heat treated to a temperature of 850°C for 1 hour followed by water quenching. The heat treatment was carried out to precipitate the secondary sigma phase formation. Experiments were conducted to study the influence of independent parameters set at three factor levels using the L 27 orthogonal array of the Taguchi experimental design on the wear rate. Statistical significance of both individual and combined factor effects was determined for specific wear rate. Surface plots were drawn to explain the behavior of independent variables on the measured wear rate. Statistically, the models were validated using the analysis of variance test. Multiple non-linear regression equations were derived for wear rate expressed as non-linear functions of independent variables. Further, the prediction accuracy of the developed regression equation was tested with the actual experiments. The independent parameters responsible for the desired minimum wear rate were determined by using the desirability function approach. The worn-out surface characteristics obtained for the minimum wear rate was examined using the scanning electron microscope. The desired smooth surface was obtained for the determined optimal condition by desirability function approach.

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Section: Introductionsupporting

confidence: 61%

Dry Sliding Wear Behavior of Super Duplex Stainless Steel AISI 2507: a Statistical Approach

Davanageri

Narendranath

Kadoli

2016

Archives of Foundry Engineering

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“…The uniaxial strain at the onset of plastic yielding of the SDSS material under consideration at the test temperature of 90 °C was found to be 0.3% . The applied axial stress of 568 MPa was below the elastic limit, however, for internal pressure only and combined loading, the pipe was stressed beyond the elastic limit but below the level that caused burst or failure, see Figure .…”

Section: Resultsmentioning

confidence: 93%

“…The ferrite and austenite ratio were 49 and 51%, respectively. The mechanical properties of the material are presented elsewhere . For completeness, the effects of temperature on the Young's modulus, yield strength, and the ultimate tensile strength of the material are shown in Table .…”

Section: Methodsmentioning

confidence: 99%

“…The mechanical properties of the material are presented elsewhere. [18] For completeness, the effects of temperature on the Young's modulus, yield strength, and the ultimate tensile strength of the material are shown in Table 2. The element composition in Table 1 indicates the material has a pitting resistance equivalent number (PREN 32 ) of 45 for the PREN formula in Eq.…”

Section: Materials and Specimen Preparationmentioning

confidence: 99%

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Effect of ammonium bisulphite and chloride on the pitting and stress corrosion cracking resistance of super duplex stainless steel pipes under combined internal pressure and axial tension

Lasebikan

Akisanya

Deans

2018

Materials & Corrosion

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The oil and gas industry, like many others is constantly looking at ways to keep costs of well completion down based on cost effective solutions that do not compromise safety. This combined with the desire to develop new oil and gas fields that are very challenging in terms of operating pressures, temperatures, and corrosivity of the environment may result in the need to utilize materials closer to their mechanical loading limit in a corrosive environment. Modern alloys of high strength and corrosion resistance are often more susceptible to cracking. With a move toward higher production pressures, and temperature, production tubing for downhole use may become a limiting factor for exploration of future oil and gas wells. Typically, materials and corrosion test samples are usually set up to examine material behavior under single mode loading (e.g., tensile sample) and not combined loads experienced by a production tubing in a well completion. A novel test set‐up was developed to simulate stresses in a production tubing string with the potential to define combined load conditions in a corrosive environment once mechanical load limit is determined. In small scale tests cold worked super duplex stainless steel mini pipes were subjected to combined load, that is, axial stress simulating weight of the tubing string and internal pressure (from the reservoir). The mechanical load limit (failure envelope) was determined in the absence of a corrosive environment thereafter the mini pipes were subjected to load conditions below mechanical limit in a corrosive environment to determine load and environment conditions that would not lead to crack initiation. The potential pipe load limit when in the corrosive environment is below the corrosion test load condition to avoid crack initiation and failure.

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“…The observed growing interest of the maritime industry and the extraction industry of oil and natural gas in Cr-Ni duplex steels (DSS, SDSS) and cast steels was mainly due to their good, compared to austenitic steels (AISI 304, 316), mechanical, corrosion [2][3][4][5] and erosioncorrosion properties [6÷8]. This is particularly important in the case of storage tanks for gas and oil, which during use are exposed not only to the effect of corrosive media, but also to the high pressure (69÷207 MPa) and temperature (149÷260 C) [9].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Si and Mn on Microstructure and Selected Properties of Cr-Ni Stainless Steels

Kalandyk

Zapała

Starowicz

2017

Archives of Foundry Engineering

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Cast stainless steel of the Cr-Ni duplex type is used, among others, for the cast parts of pumps and valves handling various chemically aggressive media. Therefore, the main problem discussed in this article is the problem of abrasion wear resistance in a mixture of SiC and water and resistance to electrochemical corrosion in a 3% NaCl-H2O solution of selected cast steel grades, i.e. typical duplex cast steel, high silicon and manganese duplex cast steel, and Cr-Ni austenitic cast steel (type AISI 316L). The study shows that the best abrasion wear resistance comparable to Ni-Hart cast iron was obtained in the cast duplex steel, where Ni was partially replaced with Mn and N. This cast steel was also characterized by the highest hardness and matrix microhardness among all the tested cast steel grades. The best resistance to electrochemical corrosion in 3% NaCl-H2O solution showed the cast duplex steel with high content of Cr, Mo and N. The addition of Ni plays rather insignificant role in the improvement of corrosion resistance of the materials tested.

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The Mechanical Behavior of a 25Cr Super Duplex Stainless Steel at Elevated Temperature

Cited by 13 publications

References 19 publications

Dry Sliding Wear Behavior of Super Duplex Stainless Steel AISI 2507: a Statistical Approach

Dry Sliding Wear Behavior of Super Duplex Stainless Steel AISI 2507: a Statistical Approach

Effect of ammonium bisulphite and chloride on the pitting and stress corrosion cracking resistance of super duplex stainless steel pipes under combined internal pressure and axial tension

The Effect of Si and Mn on Microstructure and Selected Properties of Cr-Ni Stainless Steels

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