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Rejuvenation heat treatment's influence on the microstructure and properties of superalloys
Materials Science and Technology, 2018Rejuvenation heat treatment is an important technology to restore damaged microstructure and properties of superalloys. This investigation is conducted to figure out the effect of rejuvenation heat treatment on the superalloys. The microstructure and micro-hardness of K002 and DZ125 superalloys after different heat treatment procedures were evaluated ...
Jianglong Zhang, Zheng Zhang
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Effect of Rejuvenation Heat Treatment on the Degraded Turbine Blades
Journal of Failure Analysis and Prevention, 2020This paper presents a novel approach to estimate the extended lifetime of first-stage turbine blades made of directionally solidified GTD-111 nickel-based superalloys. These turbine blades were removed from land-based industrial gas turbines for power generation.
Khier Sabri
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Full Rejuvenation Heat Treatment of GTD 111DS
Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, 2022Abstract Previous studies performed by TEServices, Sulzer and EPRI showed that GTD111 DS metallurgical and mechanical [stress rupture (SR) and low cycle fatigue (LCF)] properties can be restored close to new with and without hot isostatic pressing (HIP) followed by full solution heat treatment (FSHT).
Hans van Esch +4 more
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Full Rejuvenation Heat Treatment of MGA 1400DS
Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, 2023Abstract Directionally Solidified (DS) nickel-base superalloys have been extensively used for power generation turbine blades. These blades are exposed to high stresses and temperatures for extended periods of time and aging the microstructural and reducing the mechanical properties.
Hans van Esch +4 more
openaire +1 more source
Journal of Materials Science and Technology, 2021
Abstract Both surface and internal microstructures of a second-generation Ni-based single crystal (SX) superalloy were studied after creep and rejuvenation heat treatment (RHT). It is indicated that the microstructures, such as the dislocation network, the γ phase and the γ' phase, can be recovered to those after the standard heat treatment (SHT). It
X G Wang, Y Z Zhou, X F Sun
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Abstract Both surface and internal microstructures of a second-generation Ni-based single crystal (SX) superalloy were studied after creep and rejuvenation heat treatment (RHT). It is indicated that the microstructures, such as the dislocation network, the γ phase and the γ' phase, can be recovered to those after the standard heat treatment (SHT). It
X G Wang, Y Z Zhou, X F Sun
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Rejuvenation Heat Treatment of the Second-Generation Single-Crystal Superalloy DD6 [PDF]
Acta Metallurgica Sinica (English Letters), 2015 The second-generation single-crystal superalloy DD6 with [001] orientation was prepared by screw selecting method in the directionally solidified furnace. The long-term aging of the alloy after full heat treatment was performed at 1100 °C for 400 h. Then the rejuvenation heat treatment 1300 °C/4 h/AC + 1120 °C/4 h/AC + 870 °C/24 h/AC was carried out ...
Zhen-Xue Shi +2 more
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Rejuvenation of retired power cables by heat treatment
IEEE Transactions on Dielectrics and Electrical Insulation, 2019A possible rejuvenation method of a power cable insulated with cross-linked polyethylene (XLPE) is presented. Samples with the shape of a film with a thickness of about 0.4 mm was peeled from two retired 110 kV cables and their spare cable. First, the peeled samples were annealed at 85, 90, 95 and 100 °C.
Yue Xie, Gang Liu, Yifeng Zhao
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The effect of rejuvenation heat treatments on the repair weldability of wrought Alloy 718
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2003Abstract Extensive precipitation of needle- and plate-shaped δ-phase in the γ-nickel matrix of wrought Alloy 718 is the major microstructural change resulting from multiple weld repair/post weld heat treatment (PWHT) cycles. Isothermal heat treatments at 954 °C for times up to 100 h were used to simulate the multiple PWHTs in laboratory samples ...
M Qian
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