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Article
Mechanical Properties of Composite Rods Produced by Hot Gas Extrusion of the Nickel and Aluminum Powder Mixtures in a Steel Shell
Abstract—This paper presents the effect of hot gas extrusion (HGE) parameters on the phase composition and mechanical properties of composite rods composed of a core with reaction products of a Ni–Al powder mixtu...
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Article
Maximum Gas Pressure in Pores
An analytical expression for estimating the maximum gas pressure within a closed pore is derived. The Lamé solution for the stress–strain state of the material around a spherical pore in an infinite medium is ...
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Article
Porosity of Nickel Nanopowder Compacts Consolidated by Gas Extrusion
This paper presents a method to calculate the pore gas pressure from the minimum size of a closed pore. The pore pressure assessment is based on materials produced by consolidation of nickel nanopowders using ...
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Article
Structure and Phase Formation in Ni + Al Powder Mixture Enclosed in a Steel Cartridge during Hot Gas Extrusion
Stages of structure/phase formation in Ni + Al powder mixture enclosed in a steel cartridge in the course of hot gas extrusion (HGE) were studied. It was shown that the formation of target NiAl phase is preced...
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Article
Static, Dynamic, and Shock-Wave Strengths of 17G1S, 09G2S, 10G2FBYu, and K60 Strength Class Pipe Steels
In the development of special explosion-proof chambers that must meet strict requirements for strength reliability, an important issue is the choice of the material of the load-bearing shell subjected to pulse...
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Article
A Study of the Deformation of a Low-Density Aluminum–Lithium Alloy under Impact Compression and Localized Shear
This paper presents a study of a model for deformation of a medium-strength weldable corrosion-resistant low-density aluminum–lithium alloy under impact loading, as well as the identification and verification ...
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Article
Passivation of Compacted Samples Made of Pyrophoric Iron Nanopowders during Their Interaction with Air
Various macrokinetic modes of interaction (self-ignition or combustion) of compact samples from nonpassivated (pyrophoric) and passivated iron nanopowders with air are under study. Experiments show that the mo...
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Article
Thermal Stability of Compact Pyrophoric Nickel Nanopowder Samples after Passivation
The use of nanopowders implies the ability to safely store them without changes in their physicochemical parameters ensured by passivation. In this work, we have determined the thermal stability range in air f...
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Article
High-Temperature Gas Extrusion of a Reactive Ni + Al Powder Mixture
The results of studying steel cladded intermetallic rods manufactured by means of high-temperature gas extrusion applied for the first time for reactive powder mixtures are presented. The tests were performed ...