Scholarlink

<p>5xxx series aluminum alloys have good mechanical strength, high ductility, and corrosion resistance, especially to seawater. Although they are considered weldable alloys, solidification cracks occur during processing in the Powder Bed Fusion–Laser Beam Additive Manufacturing. Therefore, in this work, tantalum addition (~ 3 wt.%) was proposed as a nano-functionalizer creating homogeneous Al<sub>3</sub>Ta nucleation sites, improving processability in the presented technology and thus mitigating solidification cracking. Analysis of the produced samples showed a significant improvement in the processability of the proposed alloy, allowing to minimize the number of cracks, refining the grain from 112&#xa0;µm to 2.9&#xa0;µm and obtaining satisfactory ultimate tensile strength of 313&#xa0;MPa, yield strength of 208&#xa0;MPa, elongation of 25%. Additional attention should be paid to the analysis of the microstructure and computed tomography, which showed incomplete dissolution of the tantalum particles, forming a specific type of composite with the matrix. Despite the lack of remelting of tantalum particles, they are evenly distributed in the samples and fulfill their role as grain refiners.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Nanoalloyed Al5254 alloy manufactured by powder bed fusion–laser beam: microstructure and mechanical properties analysis

  • 期刊论文

  • 发表日期：

    2025年1月3日

查看全文
  • Wojciech Stopyra,
  • Irina Smolina,
  • Emilia Grochowska,
  • Karol Kobiela,
  • Michał Karoluk,
  • Marcin Kasprowicz,
  • Konrad Gruber

摘要

5xxx series aluminum alloys have good mechanical strength, high ductility, and corrosion resistance, especially to seawater. Although they are considered weldable alloys, solidification cracks occur during processing in the Powder Bed Fusion–Laser Beam Additive Manufacturing. Therefore, in this work, tantalum addition (~ 3 wt.%) was proposed as a nano-functionalizer creating homogeneous Al3Ta nucleation sites, improving processability in the presented technology and thus mitigating solidification cracking. Analysis of the produced samples showed a significant improvement in the processability of the proposed alloy, allowing to minimize the number of cracks, refining the grain from 112 µm to 2.9 µm and obtaining satisfactory ultimate tensile strength of 313 MPa, yield strength of 208 MPa, elongation of 25%. Additional attention should be paid to the analysis of the microstructure and computed tomography, which showed incomplete dissolution of the tantalum particles, forming a specific type of composite with the matrix. Despite the lack of remelting of tantalum particles, they are evenly distributed in the samples and fulfill their role as grain refiners.