Advanced Intermetallic Alloys and Intermetallics

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 1454

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Guest Editor
Department of Physics, Polzunov Altai State Technical University, Lenin Pr., 46, Barnaul 656038, Russia
Interests: structure; superstructure; molecular dynamics; Monte Carlo method; phase transformations; interatomic interactions; high-intensity external influences
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Special Issue Information

Dear Colleagues,

Intermetallic compounds and alloys based on intermetallic compounds are the subject of ever-increasing interest on the part of researchers. Such alloys have a number of important properties that are useful for their practical application, such as positive temperature dependence of the yield strength, anomalous temperature and pressure ranges, their stability, and resistance to high-intensity external influences.

The Special Issue is devoted to the ideas about the development of this direction, demonstrated by well-known scientists. The content of the Special Issue may include, but is not limited to, the following sections:

  • Results of experimental studies of intermetallic compounds;
  • Computer modeling of materials based on intermetallic compounds at three levels—microscopic (nanostructural), mesoscopic and macroscopic;
  • Application of computer simulation methods, molecular dynamics, Monte Carlo, cellular automata method and their combinations;
  • Quantum transformations are structural, superstructural. Their influence on the physical and mechanical properties of materials;
  • Superalloys based on intermetallic compounds.

Prof. Dr. Mikhail D. Starostenkov
Guest Editor

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Keywords

  • structure
  • superstructure
  • molecular dynamics
  • Monte Carlo method
  • phase transformations
  • interatomic interactions
  • high-intensity external influences

Published Papers (1 paper)

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Research

13 pages, 4424 KiB  
Article
Microstructure Refinement and Work-Hardening Behaviors of NiAl Alloy Prepared by Combustion Synthesis and Hot Pressing Technique
by Jia-Yu Hu, Shuang Zhang, Long-Jiang Zhang, Fan Peng, Hai-Long Zhao and Feng Qiu
Metals 2023, 13(6), 1143; https://doi.org/10.3390/met13061143 - 19 Jun 2023
Viewed by 1230
Abstract
Most methods used to synthesize and prepare NiAl intermetallics and their alloys have the disadvantages of complexity and high cost. In this paper, the NiAl alloy was prepared by a Combustion Synthesis and Hot Pressing (CSHP) technique under rapid solidification. The grain size [...] Read more.
Most methods used to synthesize and prepare NiAl intermetallics and their alloys have the disadvantages of complexity and high cost. In this paper, the NiAl alloy was prepared by a Combustion Synthesis and Hot Pressing (CSHP) technique under rapid solidification. The grain size of the NiAl alloy is significantly refined to 60–80 μm, which reduces the stress concentration during deformation and improves the fracture strength and fracture hardness. Moreover, the large internal stress and greater amount of dislocations in the as-cast microstructure are produced by their formation under pressure due to the fast cooling rate in the solidification process. The high dislocation density strengthens the NiAl alloy, giving it higher strength, hardness, and work-hardening ability. The high compression properties are also present in the NiAl intermetallics at room temperature, in which the fracture strength is around 1005 MPa and the fracture strain reaches 21.6%. The compressive fracture strength at room temperature is higher than that of the pure NiAl alloy prepared by the Hot-Pressing-Aided Exothermic Synthesis (HPES, about 632 MPa), while it is slightly lower than that of pure NiAl alloy treated by HPES and Hot Isostatic Pressing (HIP, 1050 MPa). The fracture strain is significantly higher than that of the NiAl alloy prepared by other methods. This study can provide guidance for the successful preparation of the NiAl alloy with high strength and toughness. Full article
(This article belongs to the Special Issue Advanced Intermetallic Alloys and Intermetallics)
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