Study of microstructure and mechanical properties of high performance Ni-base superalloy GTD-111

Sajjadi, Seyed Abdolkarim; Nategh, S.; Guthrie, R. I. L.

doi:10.1016/s0921-5093(01)01709-9

Cited by 108 publications

(34 citation statements)

References 12 publications

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“…e tertiary stage occurred earlier than usual, with a short stationary creep stage. Sajjadi et al [10] investigated a similar superalloy and reported that the increase in the creep rate was caused not by coarsening of the c′-phase, but by the change in the c′-shape from cuboidal to globular. However, the TEM images in Figure 9 show homogeneously distributed c′-particles with a globular shape in the cast alloy before creep, so the results of Sajjadi et al [10] are not applicable to this study.…”

Section: Tensile Test Resultsmentioning

confidence: 99%

“…Sajjadi et al [10] investigated a similar superalloy and reported that the increase in the creep rate was caused not by coarsening of the c′-phase, but by the change in the c′-shape from cuboidal to globular. However, the TEM images in Figure 9 show homogeneously distributed c′-particles with a globular shape in the cast alloy before creep, so the results of Sajjadi et al [10] are not applicable to this study. e average size of the precipitates was 39 nm, which is smaller than that reported by Matysiak et al [5] (70-110 nm), who investigated the same alloy directly after thin-walled wedge permanent casting in which coarsening of c′-particles occurred.…”

Section: Tensile Test Resultsmentioning

confidence: 99%

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Comparison of Creep Properties of Cast and Wrought Haynes 282 Superalloy

Kim

Park

Ahn

2018

Advances in Materials Science and Engineering

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Ni-based superalloy Haynes 282 was developed as a gas turbine material for use in the ultra-supercritical (USC) stage of nextgeneration coal-fired power plants. Temperatures in the USC stage exceed 700°C during operation. Despite the important role of Haynes 282 in increasing the performance of high-pressure turbines, as a result of its high-temperature capability, there is little information on the microstructure, deformation mechanism, or mechanical properties of the cast condition of this alloy. In this study, we compared the creep properties of Haynes 282 cast alloy with those of its wrought alloy counterpart. e tensile test results of cast and wrought Haynes 282 alloys over the temperature range 25-800°C showed that the cast product exhibited significantly lower strength and ductility compared with the wrought product at all test temperatures. A creep test performed at 750°C showed only a slight difference in the rupture life of the two products. Based on the creep test results, the deformation mechanism is discussed.

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Section: Tensile Test Resultsmentioning

confidence: 99%

Section: Tensile Test Resultsmentioning

confidence: 99%

Comparison of Creep Properties of Cast and Wrought Haynes 282 Superalloy

Kim

Park

Ahn

2018

Advances in Materials Science and Engineering

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“…15,16 The superalloy maintains a fairly good tensile-yield strength of 780 MPa with a 10 % elongation at 700°C 24 ( Table 2). Figure 1 shows the as-standard heat-treated microstructure of GTD-111.…”

Section: Gtd-111 Superalloymentioning

confidence: 99%

“…10,13 A number of advanced superalloys have been developed for GT blades during the recent two decades; these include single crystal (SC) superalloys (AM1, Rene N6, MC538, etc), the GTD-111 superalloy, directionally solidified (DS) GTD-111, the Allvac 718Plus superalloy and the like. [14][15][16][17][18] The IN-738 superalloy remained in use for the first-stage blades of GT engines during 1971-1984. However, with the development of the GTD-111 superalloy, IN-738 has now become the stage-2 blade material.…”

Section: Gt-blade-alloy Developmentmentioning

confidence: 99%

Energy-efficient gas-turbine blade-material technology – a review

Huda¹

2017

Mater. Tehnol.

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Energy-efficient gas turbines (GTs) with reduced emissions have significantly contributed to sustainable development. However, these advanced engines, operating at turbine inlet temperatures (TITs) as high as 1.600°C, require the development of highly creep-resistant materials for application in hotter-section components of GTs. This paper first reviews recent advancements in the development of creep-resistant superalloys and their microstructural control, including stable gamma-prime raft structures. Then a comparative analysis of recently developed SC superalloys is presented to enable GT designers to select appropriate materials for hotter energy-efficient GT engines. It is recommended to develop new creep-limited alloys based on the metals with higher melting temperatures (e.g., Mo and Nb alloyed with silicon); these future alloys are proposed as prospective candidates for hotter energy-efficient GTs. Keywords: energy-efficient gas turbines, gas-turbine blades, turbine inlet temperature, single-crystal superalloys Energetsko u~inkovite plinske turbine (angl. GT) z zmanj{animi emisijami so mo~no prispevale pri trajnostnem razvoju. Vendar pa ti napredni stroji, ki delujejo pri temperaturah do 1600°C v vstopnem delu turbine zahtevajo, za uporabo komponent v vro~em delu, razvoj materialov odpornih na lezenje.^lanek predstavlja prvi pregled trenutnega napredka pri razvoju na lezenje odpornih superzlitin in kontrolo njihovih mikrostruktur, vklju~no s stabilno zgradbo gama-prime. Predstavljena je analiza pred kratkim razvitih SC superzlitin, tako da je konstrukterjem GT omogo~ena izbira primernega materiala za bolj vro~e, energijsko u~inkovite GT stroje. Predlagan je razvoj novih zlitin z omejenim lezenjem, ki temeljijo na kovinah z vi{jo temperature tali{~a (npr. Mo in Nb legiran s silicijem); te bodo~e zlitine so predlagane kot perspektivne za bolj vro~e, energijsko u~inkovite GT. Klju~ne besede: energijsko u~inkovite plinske turbine, lopatice plinskih turbin, vhodna temperatura turbine, monokristalne superzlitine

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“…Commercial Ni-based superalloys are widely applied for making critical components in gas turbine engines, which require excellent mechanical and anti-corrosion properties at elevated temperature [1][2][3][4]. Mar-M004, a cast Ni-based superalloy, is strengthened primarily by Ni 3 (Al, Ti) γ precipitates, which are responsible for the stable mechanical properties during long-term applications at elevated temperature [5].…”

Section: Introductionmentioning

confidence: 99%

The Evolution of Cast Microstructures on the HAZ Liquation Cracking of Mar-M004 Weld

Cheng

Chen

Shiue

et al. 2018

Metals

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Abstract:The causes of liquation cracking in the heat-affected zone (HAZ) of a cast Mar-M004 superalloy weld were investigated. X-ray diffraction (XRD), electron probe microanalyzer (EPMA), and electron backscatter diffraction (EBSD) were applied to identify the final microconstituents at the solidification boundaries of the cast alloy. Fine borides and lamellar eutectics were present in front of some γ-γ colonies, which were expected to be liquefied prematurely during welding. The metal carbide (MC) enriched in Nb, Hf; M 3 B 2 and M 5 B 3 borides enriched in Cr and Mo; and lamellar Ni-Hf intermetallics were mainly responsible for the induced liquation cracking of the Mar-M004 weld, especially the MC carbides. Scanning electron microscope (SEM) fractographs showed that the fracture features of those liquation cracks were associated with the interdendritic constituents in the cast superalloy.

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Study of microstructure and mechanical properties of high performance Ni-base superalloy GTD-111

Cited by 108 publications

References 12 publications

Comparison of Creep Properties of Cast and Wrought Haynes 282 Superalloy

Comparison of Creep Properties of Cast and Wrought Haynes 282 Superalloy

Energy-efficient gas-turbine blade-material technology – a review

The Evolution of Cast Microstructures on the HAZ Liquation Cracking of Mar-M004 Weld

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