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<p>This study investigates the microstructure-property relationships of Scalmalloy<sup>®</sup> produced by selective laser melting subsequently subjected to natural aging. The aim of this research was to evaluate the suitability of the alloy for long-term applications. A detailed characterization of the material structure and properties was conducted using scanning and transmission electron microscopy, as well as tensile testing. The microstructure revealed a bimodal grain structure typical for additive manufacturing, consisting of a fine grain zone with an average grain size of 1.4 ± 0.7&#xa0;µm and a coarse grain zone averaging 10.0 ± 5.6&#xa0;µm. These zones exhibited distinct crystallographic textures, with the fine grain zone dominated by high-angle grain boundaries and the coarse grain zone by low-angle grain boundaries. In addition, nanoscale precipitates coherent with the Al matrix and uniformly distributed stacking faults were identified, contributing significantly to the mechanical performance of the alloy. The SLM-V samples exhibited excellent mechanical properties, including an ultimate tensile strength of 507 ± 4&#xa0;MPa, a yield strength of 487 ± 3&#xa0;MPa, and a total elongation of 9.4 ± 0.7%. The results are also discussed in terms of the recognition of coherent nanoprecipitates within the Al matrix and their influence on the resulting mechanical properties.</p>

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Microstructure and mechanical properties of Scalmalloy® produced by selective laser melting in term of long-term applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月29日

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  • K. Janus,
  • A. Jarzębska,
  • A. Wójcik,
  • A. Garbacz-Klempka,
  • J. Piekło,
  • S. Terlicka,
  • M. Piękoś,
  • J. J. Sobczak,
  • O. Krasa,
  • Ł. Krawczyk

摘要

This study investigates the microstructure-property relationships of Scalmalloy® produced by selective laser melting subsequently subjected to natural aging. The aim of this research was to evaluate the suitability of the alloy for long-term applications. A detailed characterization of the material structure and properties was conducted using scanning and transmission electron microscopy, as well as tensile testing. The microstructure revealed a bimodal grain structure typical for additive manufacturing, consisting of a fine grain zone with an average grain size of 1.4 ± 0.7 µm and a coarse grain zone averaging 10.0 ± 5.6 µm. These zones exhibited distinct crystallographic textures, with the fine grain zone dominated by high-angle grain boundaries and the coarse grain zone by low-angle grain boundaries. In addition, nanoscale precipitates coherent with the Al matrix and uniformly distributed stacking faults were identified, contributing significantly to the mechanical performance of the alloy. The SLM-V samples exhibited excellent mechanical properties, including an ultimate tensile strength of 507 ± 4 MPa, a yield strength of 487 ± 3 MPa, and a total elongation of 9.4 ± 0.7%. The results are also discussed in terms of the recognition of coherent nanoprecipitates within the Al matrix and their influence on the resulting mechanical properties.