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Mechanical properties and structure of Cu-Al-Si-Sn-Mn system non-magnetic cast bronzes

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Parent Category: 2026

Category: Content №1 2026

Created on 27 February 2026

Last Updated on 27 February 2026

Published on 30 November -0001

Written by T. V. Kimstach, K. I. Uzlov, O. P. Bilyi, S. I. Repyakh

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Authors:

T. V. Kimstach, orcid.org/0000-0002-8993-201X, Ukrainian State University of Science and Technologies, Dnipro, Ukraine; Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Dnipro, Ukraine

K. I. Uzlov, orcid.org/0000-0003-0744-9890, Ukrainian State University of Science and Technologies, Dnipro, Ukraine

O. P. Bilyi, orcid.org/0000-0003-1234-5404, Ukrainian State University of Science and Technologies, Dnipro, Ukraine

S. I. Repyakh*, orcid.org/0000-0003-0203-4135, Ukrainian State University of Science and Technologies, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2026, (1): 058 - 067

https://doi.org/10.33271/nvngu/2026-1/058

Abstract:

Purpose. To establish regularity of Cu-Al-Si-Sn-Mn system non-magnetic corrosion-resistant bronze chemical composition on structure and mechanical properties complex influence and to determine its rational composition in terms of suitability for manufacturing products by casting methods.

Methodology. For bronzes mechanical properties determination FP-100/1 technique and PSW-30 pendulum machine are used. Neophot-21 microscope is used to study microstructures. Chemical elements ratio in local areas of structural components determination is carried out with SEM-515 microanalyzer. Bronzes fracture surfaces fractographic analysis is performed visually and using Coxem EM-40 electron microscope. Bronzes relative magnetic permeability is measured with Magnetomat 1.790 magnetometer. Alloys chemical composition is determined using EXPERT 4L analyzer.

Findings. It has been established that Cu-Al-Si-Sn-Mn system bronze suitable for casting in sand molds should contain by weight 6.0‒7.5 % Al, 1.0‒2.5 % Si, 0.21‒0.45 % Mn and 1.0‒2.2 % Sn, and alloying chemical elements ratio and inevitable impurities, according to the formula: K_R = (1‒0.01 nn) (Al-Si-Mn)/(1 + Sn)², should be equal to 0.42‒0.85. Bronze with K_R > 0.85 is low-strength, but ductile and, therefore, mainly suitable for manufacturing products from it by deformation methods. Bronze with K_R < 0.42 is low-strength and brittle and it is not suitable for manufacturing products by either casting or deformation methods.

Originality. For the first time, Cu-Al-Si-Sn-Mn system bronzes alloying elements complex influence on their mechanical properties and structure formation features has been determined. Cu-Al-Si-Sn-Mn system aluminum bronzes with K_R value from 0.42 to 0.85 mechanical properties levels increase with Cu-solid solution relative volume fraction in their structures decreasing, that is, with K_R value increasing.

Practical value. The data obtained can be used as a basis for new casting, corrosion-resistant non-magnetic bronzes development that have strength and density at the level of carbon steels or aluminum bronzes alloyed with nickel and iron.

Keywords: bronze, aluminum, silicon, manganese, tin, strength, hardness, phase, structure

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