Evolution of Microstructure and Mechanical Properties of Composite Aluminum-Based Alloy during ECAP

Lezhnev, Sergey; Volokitina, Irina; Kuis, D. V.

doi:10.1134/s0031918x18040129

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…Over the past two decades, work related to ECAP of metallic materials has attracted considerable interest among scientists in both fields of metal physics and materials science. This interest arose because of the possibility to process large volumes [ 39 , 40 , 41 ]. One of the main purposes of such works is to grind metal grains to an ultrafine grained or nanostructured state.…”

Section: Introductionmentioning

confidence: 99%

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

et al. 2022

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This article describes a technology for the thermomechanical treatment of stainless-steel piston rings. This technology makes it possible to obtain rings with an optimal combination of plastic and strength properties that is essential for piston rings. The following thermomechanical treatment is suggested for piston rings manufacturing: quenching at 1050 °C, holding for 30 min and cooling in water, then straining by the HPT method for eight cycles at cryogenic temperature and annealing at a temperature up to 600 °C. The resulting microstructure consisted of fine austenite grains sized 0.3 μm and evenly distributed carbide particles. Annealing above this temperature led to the formation of ferrite in the structure; however, preserving the maximum fraction of austenitic component is very important, since the reduction of austenite in the structure will cause a deterioration of corrosion resistance. The strength properties of steel after such treatment increased by almost two times compared with the initial ones: microhardness increased from 980 MPa to 2425 MPa, relative elongation increased by 20%. The proposed technology will improve the strength and performance characteristics of piston rings, as well as increase their service life, which will lead to significant savings in the cost of repair, replacement and downtime.

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Section: Introductionmentioning

confidence: 99%

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

et al. 2022

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“…Silumines designed for internal combustion engine pistons are among the most complex in terms of chemical composition, cast alloys. These are metal materials of the Al-Si-Cu-Mg-(Ni)-(Mn)-(Fe)-(Zn) system, often supplemented by alloying additives (Mo, Cr, Co, W or V), silicon eutectic modifiers (K, Na, Sr), as well as Al-solid solution grain choppers (Sc, Ti, V, Zr, B) and primary silicon crystal modifiers (P, S) (Lezhnev et al, 2018;Szymczak et al, 2018). In specialist publications, there are also views on the appropriateness of introducing other alloyed additives into piston silos, which are grain shredders or modifiers.…”

Section: Piston Siluminesmentioning

confidence: 99%

Improving the quality level in the automotive industry

Pacana

Czerwińska

2020

Production Engineering Archives

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Currently, effective quality management of manufactured products is a factor determining the development of manufacturing companies. However, the identification of the source of non-compliance and the analysis of its causes are sometimes underestimated and are not followed by appropriate methodologies. The study aimed to streamline and improve the production process of aluminium pistons for passenger cars by solving the problem related to a significant number of non-compliant products. The analysis of types of nonconformities identified through penetration testing was performed. The use of histogram, brainstorming session and Pareto-Lorenz diagram was proposed, which allowed identifying the causes of the problem. The presented solution shows the practical effectiveness of a sequence of selected instruments to solve production problems. The proposed sequence of methods can be implied in other qualitative analyses in different companies.

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“…It is known from works [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] that currently ECAP has many modifications aimed at reducing the pressing force, increasing the degree of shear deformation per pass, more uniform distribution of compressive stresses, and improving the geometry of the sample after pressing. For pressing metals with superplasticity, the most suitable ECAP is in a matrix with a quasi-small angle of channels intersection of 45° (Fig.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Mechanical Properties of Titanium Nickelide during Pressing in Equal-Channel Angular Matrix with Quasi-Small Angle of Channels Intersection

Naizabekov

Kuis

Касперович

2021

DDF

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The article presents the results of the analysis of the microstructure and mechanical properties of titanium nickelide formed during pressing in an equal-channel angular matrix with a quasi-small angle of channels intersection. The conducted studies have shown that pressing in an equal-channel angular matrix with a quasi-small angle of channels intersection ensures the formation of a homogeneous sub-ultrafine-grained structure in the titanium nickelide alloy, while the average grain size, decreasing by 100-200 times, is 0.3-0.5 microns, and the tensile strength increases to 1350 MPa in 6 passes, which is almost 90% higher than in the coarse-grained quenched state.

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Evolution of Microstructure and Mechanical Properties of Composite Aluminum-Based Alloy during ECAP

Cited by 8 publications

References 13 publications

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

Improving the quality level in the automotive industry

Microstructure Evolution and Mechanical Properties of Titanium Nickelide during Pressing in Equal-Channel Angular Matrix with Quasi-Small Angle of Channels Intersection

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