Microstructural evolution and corrosion behavior of Sanicro 28 during thermomechanical processing

Eftekhari, Niloofar; Muhammad, Waqas; Haftlang, Farahnaz; Zarei-Hanzaki, A.; Martin, Étienne

doi:10.1016/j.mtcomm.2020.101228

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…Nickel-based (Ni-based) superalloys possess a combination of outstanding mechanical and physical properties at high temperatures, making them attractive for application in gas-turbine and jet-engine components (Reed 2006;Thatte et al, 2017;Stinville et al, 2018;Eftekhari et al, 2020). In aeroengine and gas turbine power industries, there are numerous geometrically complex components made with intricate serpentine cooling paths and thin wall sections, including the combustor, diffuser, and nozzle.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Track-Scale Model for Laser Powder Bed Fusion Additive Manufacturing: Part 2—Mechanical Model

et al. 2021

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This is the second of two manuscripts that presents a computationally efficient full-field deterministic model for laser powder bed fusion (LPBF). The Hybrid Line (HL) thermal model developed in part I is extended to predict the in-process residual stresses due to laser processing of a nickel-based superalloy, RENÉ 65. The computational efficiency and accuracy of the HL thermo-mechanical model is first compared to the exponential decaying heat input model on a single-track simulation. LPBF thin-wall builds with three different laser powers and four printing patterns are evaluated in this study and compared with part-scale simulations. The simulations show good agreements with the experimental X-Ray diffraction measured residual stresses. Compared to the laser power, the scanning pattern is demonstrated to have significant effects on residual stresses. Laser scan patterns utilizing short laser paths generate lower tensile stress along the longitudinal direction of the part and higher compressive stress along the build direction.

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Section: Introductionmentioning

confidence: 99%

An Efficient Track-Scale Model for Laser Powder Bed Fusion Additive Manufacturing: Part 2—Mechanical Model

et al. 2021

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“…1 Intr 1 Introduction oduction N08028 Alloy is widely used in chemical and petrochemical industry due to its excellent corrosion resistance and its large yield strength [1]. Its workability is poor and the hot working range is narrow.…”

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confidence: 99%

Initiation of Dynamic Recrystallization of As-Cast N08028 Alloy

Mora¹,

Navarro²,

Silveira³

et al. 2021

Esaform 2021

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The use of high nickel content austenitic stainless steels (SASS) has significantly increased in the last decade. The corrosion and high fatigue resistance of these materials make them suitable for manufacturing oil country tubular goods (OCTG). SASS are processing by forging from casting conditions. Dynamic recovery (DRV) and recrystallization (DRX) of as-cast super austenitic stainless steel, N08028 Alloy, is investigated to study the refining effect from the as-cast grain structure to fully recrystallized austenite due to hot deformation. Both the critical stress and strain for the initiation of DRX are determined using the flow curves. To perform this analysis, hot compression tests are performed at temperatures between 900°C and 1250°C, and strain rates between 0.1 s-1 and 10 s-1, up to 0,8 final strain using a Gleeble®3800 thermomechanical simulator. Subsequently, the Johnson-Avrami-Mehl-Kolmogorow (JMAK) model is used to numerically fit the flow curves and consequently determine the critical strain. No critical points are seen for temperatures under 1100°C. Above this temperature, the JMAK model proves to be valid in all studied strain rates.

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Effect of Build Height on Micro-cracking of Additively Manufactured Superalloy RENÉ 108 Thin-Wall Components

Chakraborty

Tangestani

Sabiston

et al. 2022

The Minerals, Metals &Amp; Materials Series

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Microstructural evolution and corrosion behavior of Sanicro 28 during thermomechanical processing

Cited by 6 publications

References 34 publications

An Efficient Track-Scale Model for Laser Powder Bed Fusion Additive Manufacturing: Part 2—Mechanical Model

An Efficient Track-Scale Model for Laser Powder Bed Fusion Additive Manufacturing: Part 2—Mechanical Model

Initiation of Dynamic Recrystallization of As-Cast N08028 Alloy

Effect of Build Height on Micro-cracking of Additively Manufactured Superalloy RENÉ 108 Thin-Wall Components

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