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选定的轻质复杂浓缩合金在热处理前后的建模与实验结果

Modeling and Experimental Results of Selected Lightweight Complex Concentrated Alloys, before and after Heat Treatment.

作者信息

Mitrica Dumitru, Badea Ioana Cristina, Olaru Mihai Tudor, Serban Beatrice Adriana, Vonica Denisa, Burada Marian, Geanta Victor, Rotariu Adrian Nicolae, Stoiciu Florentin, Badilita Viorel, Licu Lidia

机构信息

National R&D Institute for Nonferrous and Rare Metals-IMNR, 102 Biruintei Blvd, Pantelimon, 077145 Ilfov, Romania.

Faculty of Materials Science and Engineering, University POLITEHNICA of Bucharest, 313 Splaiul Independenței, 6 District, 060042 Bucharest, Romania.

出版信息

Materials (Basel). 2020 Sep 29;13(19):4330. doi: 10.3390/ma13194330.

DOI:10.3390/ma13194330
PMID:33003363
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7579168/
Abstract

Lightweight complex concentrated alloys (LWCCA), composed of elements with low density, have become a great area of interest due to the high demand in a large number of applications. Previous research on LWCCAs was focused on high entropy multicomponent alloy systems that provide low density and high capability of solid solution formation. Present research introduces two alloy systems (Al-Cu-Si-Zn-Mg and Al-Mn-Zn-Mg-Si) that contain readily available and inexpensive starting materials and have potential for solid solution formation structures. For the selection of appropriate compositions, authors applied semi-empirical criteria and optimization software. Specialized modeling software (MatCalc) was used to determine probable alloy structures by CALPHAD, non-equilibrium solidification and kinetic simulations. The selected alloys were prepared in an induction furnace. Specimens were heat treated to provide stable structures. Physicochemical, microstructural, and mechanical characterization was performed for the selected alloy compositions. Modeling and experimental results indicated solid solution-based structures in the as-cast and heat-treated samples. Several intermetallic phases were present at higher concentrations than in the conventional alloys. Alloys presented a brittle structure with compression strength of 486-618 MPa and hardness of 268-283 HV. The potential for uniform intermetallic phase distribution in the selected alloys makes them good candidates for applications were low weight and high resistance is required.

摘要

轻质复合浓缩合金（LWCCA）由低密度元素组成，由于在大量应用中的高需求，已成为一个备受关注的领域。先前对LWCCA的研究集中在高熵多组分合金体系，该体系具有低密度和高固溶体形成能力。目前的研究引入了两种合金体系（Al-Cu-Si-Zn-Mg和Al-Mn-Zn-Mg-Si），它们包含易于获得且价格低廉的起始材料，并且具有形成固溶体结构的潜力。为了选择合适的成分，作者应用了半经验标准和优化软件。使用专业建模软件（MatCalc）通过CALPHAD、非平衡凝固和动力学模拟来确定可能的合金结构。所选合金在感应炉中制备。对试样进行热处理以提供稳定的结构。对所选合金成分进行了物理化学、微观结构和力学表征。建模和实验结果表明，铸态和热处理后的样品中存在基于固溶体的结构。几种金属间相的浓度高于传统合金。合金呈现出脆性结构，抗压强度为486-618MPa，硬度为268-283HV。所选合金中金属间相均匀分布的潜力使其成为需要低重量和高抗性应用的良好候选材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/face/7579168/bf72e5d299e1/materials-13-04330-g015.jpg
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本文引用的文献

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Accelerated exploration of multi-principal element alloys with solid solution phases.对具有固溶相的多主元合金进行加速探索。
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