Abstract:
High Entropy Alloys are characterized with specific properties, including high hardness, wear-resistance, high strength, structural stability, corrosion and oxidation-resistance [1-5]. The complex of desired properties defines the increasing interest for the application in different fields of engineering. In spite of the interest towards High Entropy Alloys/materials, most of the traditional methods do not allow the fabrication the desired varieties of composites due to the technological limitation. On the other hand, investigations towards high entropy materials are increasing as there are some properties that have to be studied and validated in multi-component systems.
The goal of the current investigations is to carry out experiments and define synthesis regimes for Ti-Ni-Fe-W-Cu system powders by mechanical alloying and establish the technological parameters for the formation of High Entropy Alloys. The other goal of the work is to make experimental investigations for the synthesis of bulk materials by an explosive consolidation technique.
The paper describes the preliminary theoretical investigations and initial experimental results of mechanical alloying and explosive compaction of the Ti-Ni-Fe-W-Cu multi-component system.
As a result, the preliminary investigations establish the technological parameters for mechanical alloying. The blend with different percentages of content of powders was prepared. The high energetic planetary ball mill was used for blend processing, mechanical alloying, and amorphization ultrafine/nanopowder production. The time of processing varied in the range of 1-28 h. Selected Ball milled blends were compacted by explosive consolidation technology. For shock wave generation, the industrial explosives and new explosives obtained from decommissioned weapons were used in the experiments. The technological parameters of the explosive consolidation have been studied and are discussed in this paper.
References:1. Yeh J. et al, Nanostructured high entropy alloys with multiple principal elements: novel alloy design concepts and outcomes, Adv. Eng. Mater. V. 6., #5, 2004
2. Michael C. Cao, Jien-Wei-Yeh, Peter K. Liaw, Youg Zhang, eBook: High-Entropy Alloys, Fundamentals and Applications, Springer, 2016
3. High-Entropy Alloys, JOM, An official publication of The Minerals, Metals & Materials Society, Springer, November 2017
4. Cantor B. et al., Materials Science and Engineering: A, 375-377, 213-218, 2004,
5. He Q. F. et al, Design of High-Entropy Alloy: A Perspective from Nonideal Mixing, JOM, v.69., # 11, p. 2092-2098, 2017
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