The Influence of Grain Size on Low-Stability Pre-Transitional Structural-Phase States of NiAl Intermetallide

Potekaev, A. I.; Chaplygina, A. A.; Chaplygin, P. A.; Старостенков, М. Д.; Кулагина, В. В.; Клопотов, А. А.; Grinkevich, L. S.

doi:10.1007/s11182-019-01740-w

Cited by 11 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Increased hardness and wear resistance are associated with the formation of the NiAl phase. The NiAl intermetallic compound has several features, including low-density, relatively high melting point, excellent resistance to corrosion and oxidation, high strength at elevated temperatures, and relatively low-cost [32,33]. For these reasons, NiAl-based intermetallides are good candidates for a variety of applications, such as the production of blades and other turbine components.…”

Section: Resultsmentioning

confidence: 99%

Structure and Tribological Properties of Ni–Cr–Al-Based Gradient Coating Prepared by Detonation Spraying

et al. 2021

View full text Add to dashboard Cite

In this paper, Ni–Cr–Al coatings were deposited using the detonation spraying method. The aim was to investigate how technological parameters influence coating structure formation, phase composition and tribological performances. We observed that the degree to which the barrel is filled with an O2/C2H2 gas mixture strongly influences the chemical composition of manufactured coatings. High degrees of barrel filling led to a decrease in aluminum content in the coating. Filling degrees of 40% and 50% produced sprayed coatings in which only Ni–Cr phases could be found. When the filling degree was reduced up to 25%, Ni–Al phases began to form in the sprayed coatings. Gradient Ni–Cr–Al coatings were produced by gradually reducing the filling degree from 50% to 25%. These coatings are characterized by Ni–Cr near the substrate level with Ni–Cr and Ni–Al phases at higher levels. The results obtained confirm that gradient Ni–Cr–Al coatings exhibit high hardness as well as good wear resistance.

show abstract

Section: Resultsmentioning

confidence: 99%

Structure and Tribological Properties of Ni–Cr–Al-Based Gradient Coating Prepared by Detonation Spraying

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Binary alloys of stoichiometric compositions are used in technology as structural and functional materials, which arouses increased interest among researchers [1][2][3][4][5][6]. An important issue in the study of stoichiometric binary alloys is the evolution to the structure during heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Thermal Cooling Curves in the Process to Ordering Alloys by the Monte Carlo Method

Khalikov

2021

DDF

View full text Add to dashboard Cite

An algorithm is proposed for constructing curves of thermal cooling and ordering kinetics with a monotonic decrease in temperature for alloys to stoichiometric composition. Modeling is carried out by the Monte Carlo method in the model of a rigid crystal lattice and pair interatomic interactions. The application of the algorithm is illustrated by the example to a square lattice, taking into account interatomic interactions in the first two coordination spheres for alloys with the composition AB, A3B, and A3B5. The proposed model makes it possible to calculate individual sections of the phase diagrams to the state for binary alloys.

show abstract

“…One of the ways to predict the properties of intermetallic phases is computer modeling of the structure of alloys, which allows to reveal undesirable structural states for a given alloy prior to experiment. Various computational methods can be used, for example, molecular dynamics (MD) [31], phase-field [32], finite element [33], Monte Carlo [34][35][36][37] and others methods. Diffusion processes have also been modeled in frame of two-dimensional continuum model [38].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Diffusion Bonding of Different Heat Resistant Nickel-Base Alloys

et al. 2020

View full text Add to dashboard Cite

Currently, an important fundamental problem of practical importance is the production of high-quality solid-phase compounds of various metals. This paper presents a theoretical model that allows one to study the diffusion process in nickel-base refractory alloys. As an example, a two-dimensional model of ternary alloy is considered to model diffusion bonding of the alloys with different compositions. The main idea is to divide the alloy components into three groups: (i) the base element Ni, (ii) the intermetallic forming elements Al and Ti and (iii) the alloying elements. This approach allows one to consider multi-component alloys as ternary alloys, which greatly simplifies the analysis. The calculations are carried out within the framework of the hard sphere model when describing interatomic interactions by pair potentials. The energy of any configuration of a given system is written in terms of order parameters and ordering energies. A vacancy diffusion model is described, which takes into account the gain/loss of potential energy due to a vacancy jump and temperature. Diffusion bonding of two dissimilar refractory alloys is modeled. The concentration profiles of the components and order parameters are analyzed at different times. The results obtained indicate that the ternary alloy model is efficient in modeling the diffusion bonding of dissimilar Ni-base refractory alloys.

show abstract

The Influence of Grain Size on Low-Stability Pre-Transitional Structural-Phase States of NiAl Intermetallide

Cited by 11 publications

References 12 publications

Structure and Tribological Properties of Ni–Cr–Al-Based Gradient Coating Prepared by Detonation Spraying

Structure and Tribological Properties of Ni–Cr–Al-Based Gradient Coating Prepared by Detonation Spraying

Simulation of Thermal Cooling Curves in the Process to Ordering Alloys by the Monte Carlo Method

Simulation of Diffusion Bonding of Different Heat Resistant Nickel-Base Alloys

Contact Info

Product

Resources

About