The effects of Co and Ti additions on microstructures and compressive strength of Udimet710

Xu, Luhua; Cui, Chuanyong; Sun, Xiaofeng

doi:10.1016/j.msea.2011.07.019

Cited by 31 publications

(9 citation statements)

References 10 publications

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“…9 Owing to the high content of Ti in the alloy, the role of this alloying element to form c9 precipitates is essential, and this provides higher strength at higher temperatures for the alloy. [10][11][12] Based on the published data reported for the cast IN939 superalloy, 4,6,7 it could be predicted that the wrought version of this alloy would have excellent hot corrosion and oxidation resistance, low tendency to form topologically closed packed phases such as s and m due to low Nv factor and absence of Mo in its chemical composition. 12,13 The IN939 superalloy has high amounts of carbide forming elements, such as Ti, Nb and Ta, but there is no Mo in its chemical composition.…”

Section: Introductionmentioning

confidence: 99%

Development of wrought precipitation strengthened IN939 superalloy

Jahangiri¹,

Arabi²,

Boutorabi³

2012

Materials Science and Technology

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The potential of cast IN939 superalloy to be converted to wrought alloy has been explored in the present work. For this objective, bars of cast alloy were rolled under different conditions and then subjected to various heat treatment cycles. The results indicated that the yield strength, ultimate tensile strength and ductility of the wrought IN939 alloy are superior to the cast version. The stress rupture properties of wrought IN939 superalloy are better than those of the widely used superalloys, such as Nimonic 90 and Waspaloy, and approach the alloy Nimonic 105 properties. This is very notable because Nimonic 105 contains ∼45 vol.- γ′ that is much greater than the volume fraction of those strengthening precipitates in the alloy IN939 (∼35). On the whole, the wrought form of this alloy has a high potential for manufacturing hot components to be used safely under aggressive turbine environment.

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Section: Introductionmentioning

confidence: 99%

Development of wrought precipitation strengthened IN939 superalloy

Jahangiri¹,

Arabi²,

Boutorabi³

2012

Materials Science and Technology

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“…The Co content was varied from 13.4 wt% to 48.2 wt%, and the strength increased with increasing Co and Ti content. In their report, the Ti content was simultaneously changed and the third phase, eta phase, existed in all modified alloys, which makes the explanation more complicated [16]. Therefore, the Co effect on strength, especially high Co content in disk superalloys, needs further investigation to obtain a better understanding.…”

Section: Introductionmentioning

confidence: 98%

“…For example, Mauer et al reported that there is only about 4% improvement of the yield strength at room temperature (RT) in Waspaloy alloy by replacing Ni with Co up to 13.25 wt%, whereas no essentially effect on the yield strength at 538 1C [12]. More recently, Xu et al [16] studied the effects of Co and Ti additions in a Udimet 710 alloy. The Co content was varied from 13.4 wt% to 48.2 wt%, and the strength increased with increasing Co and Ti content.…”

Section: Introductionmentioning

confidence: 99%

Enhanced strength at intermediate temperatures in a Ni-base disk superalloy with high Co addition

Yuan

Zhong

Yokokawa

et al. 2012

Materials Science and Engineering: A

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“…Co can substitute Ni in the crystal lattice, and it is broadly deemed one of the main elements in γ′-strengthened Ni-based superalloys. Based on previous works, it was found that Co can cause γ′-Ni 3 (Al,Ti) to transform into γ′-(Ni,Co) 3 (Al,Ti) [ 12 , 13 , 14 ], reduce the stacking fault energy, and modify the lattice mismatch of γ/γ′ to influence the morphology of γ′ precipitates [ 15 , 16 ]. However, the effects of Co on other precipitates, such as carbides and the σ phase, have not yet been studied.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Co on the Microstructure and Mechanical Properties of Ni-Based Superalloys Prepared via Selective Laser Melting

et al. 2023

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In this work, two Ni-based superalloys with 13 wt.% and 35 wt.% Co were prepared via selective laser melting (SLM), and the effects of Co on the microstructure and mechanical properties of the additively manufactured superalloys were investigated. As the Co fraction increased from 13 wt.% to 35 wt.%, the average grain size decreased from 25.69 μm to 17.57 μm, and the size of the nano-phases significantly increased from 80.54 nm to 230 nm. Moreover, the morphology of the γ′ phase changed from that of a cuboid to a sphere, since Co decreased the γ/γ′ lattice mismatch from 0.64% to 0.19%. At room temperature, the yield strength and ultimate tensile strength of the 13Co alloy reached 1379 MPa and 1487.34 MPa, and those of the 35Co alloy were reduced to 1231 MPa and 1350 MPa, while the elongation increased by 52%. The theoretical calculation indicated that the precipitation strengthening derived from the γ′ precipitates made the greatest contribution to the strength.

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The effects of Co and Ti additions on microstructures and compressive strength of Udimet710

Cited by 31 publications

References 10 publications

Development of wrought precipitation strengthened IN939 superalloy

Development of wrought precipitation strengthened IN939 superalloy

Enhanced strength at intermediate temperatures in a Ni-base disk superalloy with high Co addition

The Effects of Co on the Microstructure and Mechanical Properties of Ni-Based Superalloys Prepared via Selective Laser Melting

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