Influence of Ti content on microstructure, mechanical properties and castability of directionally solidified superalloy DZ125L

Yang, Fu; Liu, Enze; Zheng, Zhi; Jian, Tong; Ning, Likui

doi:10.1016/j.matdes.2014.04.059

Cited by 18 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, the service temperature of turbine blades has been getting higher due to the increasing thrust-to-weight ratio of aero-engines. Hence, the contents of solid solution strengthening elements, i.e., W and Mo, and precipitation strengthening elements, i.e., Al and Ti, continue to increase [ 4 , 5 , 6 , 7 ]. Recently, high W-content, Ni-based superalloys have been widely used in the production of engine turbine blades because of their low cost and high temperature-bearing capacity [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content

Quan¹,

Sun

Sheng

et al. 2022

Materials

View full text Add to dashboard Cite

The effect of the Mo contents of 1.0 wt.%, 1.5 wt.%, 2.0 wt.%, and 3.0 wt.% on the microstructures and mechanical properties of the polycrystalline superalloy with a high W content was studied. The typical dendrite morphology was observed in the high-W superalloy with different Mo contents, containing γ matrix, γ′ phase, eutectic, and MC carbide. After the heat treatment, the primary MC carbides were decomposed into M6C carbides, while a needle-like topologically close-packed (TCP) phase was formed in the alloy with high Mo content, in contrast to the other three alloys with low Mo content. The Mo addition increased the lattice parameter of the γ and γ′ phases and also changed the lattice misfits of the γ and γ′ phase lattice misfits towards a larger negative. The addition of Mo improved the yield strength at room temperature due to the solid solution strengthening and coherency strengthening. The improvement of the stress rupture lives at 975 °C/225 MPa was due to the combination of the suppressed propagation of the microcracks by the carbides and a more negative misfit. When the Mo content reached 3.0 wt.%, the TCP phases formed and decreased the ultimate tensile strength and the stress rupture lives as a result.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content

Quan¹,

Sun

Sheng

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…Four bond coat systems were used: undoped NiAl and Hf-doped NiAl bond coats both deposited on one Hf-free superalloy (DZ125L) and one Hf-containing superalloy (DZ125), respectively. DZ125L alloy is a directionally solidified nickel-based superalloy, and its improved version DZ125, is widely used for gas turbines and boilers due to its good thermo-mechanical properties [24,25]. In addition, a conventional NiCoCrAlY bond coat was also deposited on these two superalloys for comparison.…”

Section: Introductionmentioning

confidence: 99%

The oxidation performance of plasma-sprayed NiAl bond coat: Effect of Hf addition in bond coat and substrate

Zhao

Luo

Xiao

et al. 2018

Surface and Coatings Technology

View full text Add to dashboard Cite

NiAl bond coats with and without Hf addition (0.1 at%) were deposited on two types of superalloy substrates (i.e., DZ125L, no Hf, and DZ125, 0.51 at% Hf) using plasma spraying technique, and isothermally oxidized at 1150 ºC. It demonstrates that Hf addition in the bond coat is more effective than in the superalloy substrate for improving the bond coat oxidation resistance. In addition, though the substrate chemistry could affect the bond coat oxidation performance, this effect was very sensitive to the chemistry of the bond coat -obvious for the RE (reactive element)-free NiAl bond coat, but less obvious for the RE-containing bond coats (NiAlHf and NiCoCrAlY). Moreover, compared with the NiCoCrAlY bond coat, the NiAlHf bond coat showed significantly improved oxidation resistance, regardless of the substrate chemistry, suggesting that NiAlHf bond coat prepared by plasma spraying is a promising candidate for the thermal barrier coating application.

show abstract

Effect of Aluminum on Microstructure, Mechanical Properties and Castability of a Directionally Solidified Superalloy

Tan

Jian

Tang

et al. 2018

High Performance Structural Materials

View full text Add to dashboard Cite

Influence of Ti content on microstructure, mechanical properties and castability of directionally solidified superalloy DZ125L

Cited by 18 publications

References 21 publications

Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content

Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content

The oxidation performance of plasma-sprayed NiAl bond coat: Effect of Hf addition in bond coat and substrate

Effect of Aluminum on Microstructure, Mechanical Properties and Castability of a Directionally Solidified Superalloy

Contact Info

Product

Resources

About