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Alloys and Composites for High Temperature Applications

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 1867

Special Issue Editors


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Guest Editor
Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
Interests: high-temperature materials, including Ni-based superalloys, Mo- and Nb-silicide-based multiphase intermetallic alloys; ultra-high temperature ceramics; processing and structure-property correlation; creep and environmental degradation; nanocrystalline thin films

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Guest Editor
Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
Interests: alloy design; grain boundaries and interfaces; aqueous and high-temperature corrosion; creep, fatigue and fracture; computational materials modeling

Special Issue Information

Dear Colleagues,

During the last few decades, there have been significant advances in the development of high-temperature materials for potential applications in hot-end components of aero-engines, automotive components such as diesel engine glow plugs, nose-cones and the leading edges of hypersonic re-entry vehicles, steam-turbines and boilers in advanced ultra-supercritical power plants, as well as reactors in nuclear power plants. It is well-accepted that the materials chosen for such applications should not only possess high melting points, but the ability to retain strength and resist environmental degradation by oxidation and hot corrosion, along with ablation at high temperatures and extreme environments. Additionally, it is desirable to have an adequate fracture toughness, fatigue resistance and ductility, along with ease of fabrication to obtain near-net shaped products with optimized composition and microstructures. The researchers developing high-temperature materials are faced with a formidable challenge to meet the aforementioned requirements in a single alloy or composite. The materials drawing worldwide attention for use at high temperatures include: nickel- and cobalt-based superalloys, ferritic stainless steels, precipitation- and dispersion-hardened special steels, Mo- and Nb-based refractory alloys, multiphase intermetallic alloys based on aluminides and refractory silicides, high-entropy alloys, as well as continuous fibre-reinforced carbon-carbon composites, carbon fibre-silicon carbide and ultra-high-temperature ceramics. In recent years, research has been dedicated to developing protective coatings for various alloys and composites, which are susceptible to environmental degradation.

Prof. Dr. Rahul Mitra
Dr. Sumantra Mandal
Guest Editors

Manuscript Submission Information

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Keywords

  • high-temperature materials
  • superalloys
  • multiphase refractory intermetallic alloys
  • special steels
  • high-entropy alloys
  • continuous fibre ceramic composites
  • ultra-high-temperature ceramics
  • creep
  • oxidation
  • hot corrosion

Published Papers (1 paper)

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Research

20 pages, 11299 KiB  
Article
Influence of Circular through Hole in Pt–Rh Bushing on Temperature Propagation at High Temperature
by Nan Yang, Youping Gong, Peng He, Chuanping Zhou, Rougang Zhou, Huifeng Shao, Guojin Chen, Xiaowei Lin and Hongling Bie
Materials 2022, 15(21), 7832; https://doi.org/10.3390/ma15217832 - 6 Nov 2022
Cited by 2 | Viewed by 1305
Abstract
In the fiberglass industry, Pt–Rh bushings made of platinum and rhodium have very good characteristics, such as high temperature resistance, corrosion resistance, oxidation resistance, and creep resistance. In this paper, a semi-infinite lath structure model is constructed, and the expression of the surface [...] Read more.
In the fiberglass industry, Pt–Rh bushings made of platinum and rhodium have very good characteristics, such as high temperature resistance, corrosion resistance, oxidation resistance, and creep resistance. In this paper, a semi-infinite lath structure model is constructed, and the expression of the surface temperature distribution of a Pt–Rh alloy plate with a circular through hole is obtained based on the non-Fourier heat conduction equation, complex function method and conformal mapping method. At the same time, the influence of the position of the circular through hole in the Pt–Rh bushing and the parameters of the incident light source (Non-diffusion incident wave number and relative thermal diffusion length) on the surface temperature distribution of the Pt–Rh bushing is studied by using this formula. It is found that: 1. heat concentration and fracture are occur easily at the through hole; 2. when the through hole is in the asymmetric center, the greater the asymmetry, the smaller the maximum temperature amplitude; 3. when the buried depth of the through hole increases, the maximum temperature amplitude decreases; 4. when the incident wave number and the relative thermal diffusion length of the incident light source are larger, the maximum temperature amplitude is smaller. The numerical results are almost consistent with those of ANSYS thermal simulation. The expression of the surface temperature distribution of the semi-infinite lath structure proposed in this paper can effectively reduce the loss of precious metal materials and the time of thermal simulation in the experimental process, as well as provide important significance for structural design, quality inspection, process optimization, and service life improvement of Pt–Rh bushings. Full article
(This article belongs to the Special Issue Alloys and Composites for High Temperature Applications)
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