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Research Progress on Fatigue, Corrosion and Mechanical Properties of Advanced...
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Research Progress on Fatigue, Corrosion and Mechanical Properties of Advanced Superalloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: 30 May 2025 | Viewed by 2918

Special Issue Editor

Dr. Hexin Zhang

E-Mail Website
Guest Editor
School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
Interests: nickel-based superalloys; thermo-mechanical fatigue; high-temperature oxidation; hot corrosion

Special Issue Information

Dear Colleagues,

The further improvement of the thrust–weight ratio has generated high requirements for turbine disks due to the rapid development of the aeronautics and astronautics industry. Turbine disks, one of the most important hot-end components in aeroengines, withstand the combined effects of mechanical and thermal stresses. Turbine disks must possess perfect resistance to thermal–mechanical cyclic loadings so as to withstand the superposition of centrifugal loadings and thermal stresses. Nickel-based superalloys have been extensively utilized in turbine disks due to their high temperature oxidation resistance, hot corrosion resistance, thermal fatigue resistance, persistent strength and creep resistance when employed in extreme environments. However, nickel-based superalloys can experience thermal-induced strains or stresses and suffer from the interaction of fatigue, creep and oxidation, which easily give rise to thermo-mechanical fatigue (TMF) during takeoff and landing processes. As a specific type of fatigue, TMF may lead to such hot-end components exhibiting a limited lifetime compared with isothermal fatigue due to the effect of additional deformation and damage mechanisms under varying temperature conditions. The TMF of nickel-based superalloys has garnered increasing attention in recent years due to the many factors that affect these fatigue behaviors and their relationship with the application of turbine disks.

This Special Issue welcomes the submission of articles on the fatigue life, corrosion and mechanical properties of superalloys and high-temperature composites.

Dr. Hexin Zhang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nickel-based superalloys
  • thermo-mechanical fatigue
  • high-temperature oxidation
  • hot corrosion

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Published Papers (3 papers)

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Research

12 pages, 1916 KiB  
Article
A Revisiting to Re-Effects on Dislocation Slip Mediated Creeps of the γ′-Ni3Al Phase at High Temperature via a Hybrid Model
by Zhuangzhuang Kong, Jianing Luo, Yunlei Xu and Ping Peng
Metals 2025, 15(2), 103; https://doi.org/10.3390/met15020103 - 22 Jan 2025
Viewed by 668
Abstract
The anomalous flow behavior of the γ′-Ni3Al phase at high temperature is closely related to a cross-slip of 1/2110111 super-partial dislocations. The acceleration of cross-slips induced by the addition of rhenium (Re) is known as Re-effects. In [...] Read more.
The anomalous flow behavior of the γ′-Ni3Al phase at high temperature is closely related to a cross-slip of 1/2110111 super-partial dislocations. The acceleration of cross-slips induced by the addition of rhenium (Re) is known as Re-effects. In this work, by means of a series of lattice transitions, a hybrid model including a preexisting anti-phase boundary APB111 was constructed to assess the difficulty of cross-slips of 1/2110111 super-partial dislocations from 111 planes to 001 planes in the γ′-Ni3Al phases, and the impact of the addition of Re on these dislocation mediated creep resistances was reinvestigated by first-principles calculations. The results showed that the addition of Re at preferential Al sublattice sites was indeed beneficial for the cross-slip of the first leading 1/2110111 super-partial dislocations, and the existence of APB111 could promote cross-slip of second leading 1/2110111 super-partial dislocations. A detailed calculation of stacking fault energies demonstrated that an obvious Suzuki segregation of Re existed at APB111 and APB001, and Re preferentially occupied Ni sublattice sites. It is found Re-segregations at APB111 were disadvantageous for the cross-slip of new 1/2110111 super-partial dislocations, but the formation of more Kear-Wilsdorf dislocation locks could benefit from Re-segregations at APB001. Full article
(This article belongs to the Special Issue Research Progress on Fatigue, Corrosion and Mechanical Properties of Advanced Superalloys)
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14 pages, 5644 KiB  
Article
Recent Advances in Creep Modelling Using the θ Projection Method
by William Harrison
Metals 2024, 14(12), 1395; https://doi.org/10.3390/met14121395 - 5 Dec 2024
Viewed by 925
Abstract
The theta projection method has been used to predict uniaxial creep curve shapes for a wide range of materials. However, one of the criticisms of the existing method is that the multilinear approach, commonly used to correlate theta parameters to applied test conditions, [...] Read more.
The theta projection method has been used to predict uniaxial creep curve shapes for a wide range of materials. However, one of the criticisms of the existing method is that the multilinear approach, commonly used to correlate theta parameters to applied test conditions, does not extrapolate well over a full range of creep conditions, due to not accounting for changes in creep mechanisms. This is particularly important for evaluating the creep behaviour of structural engineering components that operate in an environment in which a wide range of stress and/or temperatures exist during their service life. This study uses the theta projection method to evaluate creep curves for the nickel-based superalloy, Waspaloy, over a range of test conditions, considering changes in observed dominant creep mechanisms. A clear break in the trend of θ3 and θ4 with respect to stress is observed, indicating that a change in mechanism is important for tertiary creep. Using a power law approach along with optimisation algorithms, the residual error between predicted and experimentally observed creep curves is reduced. With more accurate prediction of creep curves, creep rates throughout the duration of creep can be more accurately calculated, providing the basis of more accurate computational creep models. Full article
(This article belongs to the Special Issue Research Progress on Fatigue, Corrosion and Mechanical Properties of Advanced Superalloys)
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9 pages, 3911 KiB  
Article
Experimental Investigation on Quasi-Freckle Phenomenon in Single-Crystal-Blade Castings of Superalloys
by Dexin Ma, Lv Li, Yunxing Zhao, Yangpi Deng, Bowen Cheng and Fuze Xu
Metals 2024, 14(10), 1129; https://doi.org/10.3390/met14101129 - 4 Oct 2024
Viewed by 1020
Abstract
During the production of single-crystal superalloy blades, a kind of channel-type defect, named “quasi-freckle”, was found on the casting surface, which is similar to typical freckles in macroscopic appearance but different in microstructure. In the as-cast microstructure of the quasi-freckle channels, the γ/γ’ [...] Read more.
During the production of single-crystal superalloy blades, a kind of channel-type defect, named “quasi-freckle”, was found on the casting surface, which is similar to typical freckles in macroscopic appearance but different in microstructure. In the as-cast microstructure of the quasi-freckle channels, the γ/γ’ eutectic is significantly accumulated and can be dissolved during the solution heat treatment. Since no disoriented grains were detected, the quasi-freckles have a basically identical crystal orientation with the matrix. The quasi-freckle channels actually appear as thermosolutal convection traces in the directional solidification process of single-crystal casting. Because the convection was not strong enough to break dendrite arms, the single-crystal consistency of the castings was not destroyed. However, with the deterioration of the solidification condition and the increase in solutal convection, quasi-freckles often develop into typical freckle defects. Full article
(This article belongs to the Special Issue Research Progress on Fatigue, Corrosion and Mechanical Properties of Advanced Superalloys)
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