weldability of duplex stainless steel curtin university

  • Weldability Approach to Duplex Stainless Steels Using ...

    Welding is a non-equilibrium process. However, some weldability issues, as the extension of the heat-affected zone (HAZ) can be addressed using equilibrium phase diagrams. The 70 wt% Fe-Cr-Ni pseudo-binary phase diagram is commonly used to establish the phase transformations during welding of duplex stainless steels. The predicted results are assumed to be reasonably good for most of the ...

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  • Machinability study of first generation duplex ... - CORE

    Machinability study of first generation duplex (2205), second generation duplex (2507) and austenite stainless steel during drilling process . ... Publisher: Curtin University of Technology. Year: 2013. OAI identifier: oai:espace.library.curtin.edu.au:191783 Provided by: [email protected] Download ...

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  • Our people - Home - Curtin Corrosion Centre

    From 2006 - 2014 Garry was the Academic Director of the Curtin Engineering Foundation Year program, and research activities at Curtin have included work on aluminium alloy welding processes, the development of porous β-titanium alloys for biomedical applications, and more recently on corrosion and integrity studies on stainless steels and high ...

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  • Dr. Tina Ting Chui Huon - Curtin University, Malaysia

    Dr. Tina Ting Chui Huon BEng, PhD Senior Lecturer Civil & Construction Engineering Contact Details Telephone: +60 85 443939 extn: 2507 Fax: +60 85 443837 Location: Skylark 3 (SK3) Room 356 Email [email protected] Background Tina has been with Curtin Sarawak since 2014. She graduated with PhD in Structural Engineering from Curtin University in 2014. Her undergraduate was [.]

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  • Investigation on the Behavior of Austenite and Ferrite ...

    This paper investigates the deformation mechanisms and plastic behavior of austenite and ferrite phases in duplex stainless steel alloys 2205 and 2507 under chip formation from a machine turning operation. SEM images and EBSD phase mapping of frozen chip root samples detected a build-up of ferrite bands in the stagnation region, and between 65 and 85 pct, more ferrite was identified in the ...

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  • Materials | Free Full-Text | The Influence of Post Weld ...

    Duplex stainless steels (DSSs) are complex materials and they have been widely used in the marine environment and gas industries, primarily offering a better resistance of pitting corrosion and good mechanical properties. In the present work, the effects of heat treatment on duplex stainless steel (DSS) weld overlay samples that were heat treated at three different temperatures, namely 350 ...

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  • Weldability and machinability of duplex stainless steel ...

    Used test material were 1.4016 (AISI 430) and 1.4003 (low-carbon ferritic) type steels in ferritic steels group and 1.4162 (low-alloyed duplex, LDX2101) and 1.4462 (AISI 2205) type steels in ...

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  • Corrosion Protection - Home - Curtin Corrosion Centre

    In this regard, hydrogen embrittlement of duplex and super duplex stainless steels is a common problem in subsea oil and gas production equipment. Because a cathodic polarization increases the surface pH, cathodic protection of subsea equipment leads to .

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  • Dr Mohammad Nazrul Islam | Curtin University, Perth, Australia

    "Weldability and machinability of duplex stainless steel. " In Stainless Steel: Microstructure, Mechanical Properties and Methods of Application Pramanik, A., and A. K. Basak., 207-238 New York: Nova Science Publishers.

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  • Dr Garry Leadbeater | Curtin University, Perth, Australia

    "The effect of shot-peening on the fretting-fatigue strength of an age-hardened aluminium alloy (2014A) and an austenitic stainless steel (En 58A). " Journal of .

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  • Hydrogen-Induced Stress Cracking of Swaged Super Duplex ...

    Introduced in the late 1950s, duplex and super duplex stainless steels (DSS and SDSS, respectively) are widely used in many industries—including oil and gas—given their combination of mechanical, technological, and corrosion properties. 1-3 The microstructure of (S)DSS is composed of body-centered cubic (α, bcc) ferrite and face-centered cubic (γ, fcc) austenite phases—both of which ...

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  • (PDF) Processing of duplex stainless steel by WEDM

    Mar 28, 2018· The processing of duplex stainless steel (DSS-2205) was carried out by Pramanic et al. [18]. They reported that input parameters i.e., pulse .

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  • Sensitisation identification of stainless steel to ...

    Apr 30, 2008· 1.. IntroductionOil and gas flow lines made from 13 Cr weldable martensitic grade stainless steel (WMSGSS) offers a very cost effective alternative to more expensive corrosion resistant alloys, in particular, 22 Cr duplex stainless steel, .However, laboratory tests and field experience indicates the 13 Cr steel undergoes intergranular stress corrosion cracking in the heat-affected zone .

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  • Crevice Corrosion of Duplex Stainless Steels In the ...

    Highly alloyed stainless steels have been considered as important alternatives to conventional low grade steels in aggressive environments. For marine applications, duplex stainless steels (DSS) such as UNS S31803 are becoming important structural materials due to their combination of high strength, resistance to localized corrosion and competitive price when compared to austenitic stainless ...

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  • Effect of Tungsten on the Precipitation Kinetics and ...

    Apr 15, 2018· Uses of super duplex stainless steels in O&G production. Duplex stainless steels (DSS) are steels composed of a two-phase ferritic-austenitic microstructure, the components of both phases having a chromium content above 10.5-13.0 wt%.

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  • Machinability study of first generation duplex ... - CORE

    Machinability study of first generation duplex (2205), second generation duplex (2507) and austenite stainless steel during drilling process . ... Publisher: Curtin University of Technology. Year: 2013. OAI identifier: oai:espace.library.curtin.edu.au:191783 Provided by: [email protected] Download ...

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  • Crevice corrosion of solution annealed 25Cr duplex ...

    Jan 01, 2021· 1. Introduction. In the case of super duplex stainless steels (SDSS), it is known that increasing the Cr, Mo, and N content improves their localised corrosion resistance to chloride-containing electrolytes with a pH value ranging from slightly acidic to moderately alkaline [,,,,, ].Tungsten has also been shown to improve the localised corrosion resistance of SDSS, although the mechanisms ...

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  • Mariano IANNUZZI | Professor & Director | Professor ...

    Two super duplex stainless steels (SDSS) with different W content, namely UNS S32750 (W-free) and UNS S39274 (2.1 wt.% W), were tested in simulated crevice corrosion environments to determine the ...

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  • An Effective Pulse-Shaping Technique for Testing Stainless ...

    Jan 28, 2019· The tested alloys exhibit high strain-hardening, but have significantly different mechanical properties: Lean Duplex Stainless Steel 2101 (LDSS 2101) and austenitic stainless steel 316L. Results show that pulse shapers made of LDSS 2101 are capable of satisfying stress equilibrium and constant strain rate conditions for the studied materials at ...

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  • Hydrogen-Induced Stress Cracking of Swaged Super Duplex ...

    Introduced in the late 1950s, duplex and super duplex stainless steels (DSS and SDSS, respectively) are widely used in many industries—including oil and gas—given their combination of mechanical, technological, and corrosion properties. 1-3 The microstructure of (S)DSS is composed of body-centered cubic (α, bcc) ferrite and face-centered cubic (γ, fcc) austenite phases—both of which ...

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  • 3_Edwin_NT_Jong | Stainless Steel | Welding

    Original Research Article. Welding Qualification Test for a Super Duplex Stainless Steel Tubing Edwin N.T. Jong1 1Department of Mechanical Engineering, School of Science and Engineering, Curtin University Sarawak, CDT 250, 98009 Miri, Sarawak, Malaysia. *Corresponding author contact no.: +60 85 443939 Extn: 3962

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  • Corrosion Under Insulation - Home - Curtin Corrosion Centre

    A hidden problem. Corrosion under insulation (CUI) is an insidious form of corrosion caused by water entrapped within thermal insulation. In hot services, carbon steel pipes, tubes, and pressure vessels operating up to 175 °C may experience CUI; while those made of austenitic and duplex stainless steels might experience CUI between 50 and 175 °C.

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  • Tute 4 Vignes - Materials Engineering Tutorial 4 ...

    Duplex stainless steels are called "duplex" because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. Duplex stainless steels (DSS) because of the presence of both the ferritic and the austenitic phase is said to have excellent resistance to corrosive environments and maintain good ...

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  • Research Resources from the Curtin Corrosion Centre

    Crevice Corrosion of Solution Annealed 25Cr Duplex Stainless Steels: Effect of W on Critical Temperatures. In this paper, we showed that tungsten, when added as a solid solution element, improved the crevice corrosion resistance of 25Cr super duplex stainless steels.

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  • Corrosion Protection - Home - Curtin Corrosion Centre

    In this regard, hydrogen embrittlement of duplex and super duplex stainless steels is a common problem in subsea oil and gas production equipment. Because a cathodic polarization increases the surface pH, cathodic protection of subsea equipment leads to .

    Get price
  • The Role of Tungsten on the Phase ... - About Corrosion

    May 29, 2020· Super Duplex Stainless Steels (SDSS) have excellent corrosion resistance due to their high concentration of alloying elements like Cr, Mo, and N. There is still, however, disagreement on the role of tungsten in the corrosion resistance of stainless steels.

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  • Professor Mariano Iannuzzi | Curtin University, Perth ...

    "High-strength nickel low alloy steels for oil and gas equipment: ASTM A508 Grade 4N under cathodic charging." Torres, C., M. Iannuzzi, and R. Johnsen. 2020. "Use of the critical acidification model to estimate the influence of w in the localized corrosion resistance of 25cr super duplex stainless steels.

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  • Chip formation mechanism and machinability of wrought ...

    Apr 15, 2015· This paper investigates the chip formation mechanism and machinability of two-phase materials, such as, wrought duplex stainless steel alloys SAF 2205 and SAF 2507. SEM and optical microscopic details of the frozen cutting zone and chips revealed that the harder austenite phase dissipates in the advancement of the cutting tool, being effectively squeezed out of the softer ferrite .

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  • Selecting corrosion resistant alloys for seawater ...

    Nov 25, 2013· In this work, the localized corrosion resistance of martensitic, ferritic, austenitic, super-austenitic, duplex, lean duplex, and super-duplex stainless steels, as well as several nickel alloys has been investigated. The alloys selected covered a PRE N range from 13 to above 65. Cyclic potentiodynamic polarization (CPP) tests were conducted in ...

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  • Weldability of Materials - Stainless Steel - TWI

    Duplex stainless steels have a two phase structure of almost equal proportions of austenite and ferrite. The composition of the most common duplex steels lies within the range 22-26% Cr, 4-7% Ni and 0-3% Mo normally with a small amount of nitrogen (0.1-0.3%) to stabilise the austenite. Modern duplex steels are readily weldable but the procedure, especially maintaining the heat input range ...

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  • The Role of Tungsten on the Phase Transformation Kinetics ...

    May 15, 2020· Stainless steels with higher contents of Cr, Mo, and N are required as the corrosivity of the environment increases. 10 Super duplex stainless steels (SDSS) are defined as highly-alloyed stainless steels with a PRE ≥ 40. 4,11 Currently, according to ISO 21457 and NORSOK M-001, only stainless steels with a PRE ≥ 40 can be used in natural and ...

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