Hardness Changes Due to the Morphological Evolution of Microstructural Phases in an As-Solidified Zn-Fe Alloy.

IF 3.1 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Materials Pub Date : 2025-03-16 DOI:10.3390/ma18061311

Guilherme Calixto Carneiro de Sousa, Andrei de Paula, Andre Barros, Amauri Garcia, Noé Cheung

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引用次数: 0

Abstract

Zn-Fe alloys are gaining attention for their use as bioabsorbable implants, and their development requires a deeper understanding of the processing-microstructure-property relationships. This study aimed to analyze the influence of microstructural features on the hardness of a Zn-2 wt.%Fe alloy. To achieve this, a casting was fabricated using directional solidification, and samples that experienced various cooling conditions were extracted from it. The results show that the microstructure of the investigated alloy was composed of a Zn-rich phase (matrix) and FeZn₁₃ intermetallic particles. Four different morphological patterns of the microstructure could be formed, depending on the thermal conditions during solidification. For each of these patterns, a reduction in the spacing between FeZn₁₃ particles, a parameter representing the degree of microstructural refinement, did not lead to a considerable increase in the hardness of the Zn-2wt.%Fe alloy. Hardness was shown to be more dependent on the morphology of the FeZn₁₃ intermetallics and Zn-rich matrix than on the degree of refinement of these microstructural phases. Therefore, the present research provides valuable insights into the development of enhanced Zn-Fe alloys by demonstrating how microstructural features can affect their properties, particularly in terms of hardness and morphologies of the microstructural phases.

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凝固Zn-Fe合金显微组织相形态演变导致硬度变化。

锌铁合金作为生物可吸收的植入物越来越受到关注，其发展需要对加工-微观结构-性能关系有更深入的了解。本研究旨在分析微观组织特征对Zn-2 wt.%Fe合金硬度的影响。为了实现这一目标，使用定向凝固制造了铸件，并从中提取了经历各种冷却条件的样品。结果表明：合金的显微组织由富锌相（基体）和FeZn13金属间颗粒组成；根据凝固过程中的热条件，可以形成四种不同的微观组织形态。对于每种模式，FeZn13颗粒之间的间距（代表微观组织细化程度的参数）的减小并没有导致Zn-2wt硬度的显着增加。% Fe合金。结果表明，合金的硬度主要取决于FeZn13金属间化合物和富锌基体的形貌，而不是这些显微组织相的细化程度。因此，本研究通过展示微观组织特征如何影响其性能，特别是微观组织相的硬度和形貌，为增强Zn-Fe合金的发展提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

5.80

自引率

14.70%

发文量

7753

审稿时长

1.2 months

期刊介绍： Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.