Scholarlink

<p>Maraging steels are known to achieve the best mechanical properties when aged around 480&#xa0;°C. However, the precipitate formation process is still not straightforward enough at this temperature. In this research, Mössbauer spectroscopy, complemented with transmission electron microscopy, x-ray diffraction, hardness measurements, and optical microscopy techniques, was used to investigate the phase transformation process of solution-treated and 480&#xa0;°C-aged Maraging-300 steel specimens. The results indicated that the precipitation of intermetallic compounds starts at the early stages of aging and that these precipitates are Fe-free, which are responsible for improving mechanical properties. Atomic mobility is discussed, and precipitate formation is evidenced. Small amounts of reverted austenite due to precipitate dissolution were detected at longer aging times, and the formation of paramagnetic iron-rich phases is also suggested.</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

Atomic Rearrangement and Phase Transformation during Aging at 480 °C in a Maraging-300 Steel

  • 期刊论文

  • 发表日期：

    2025年5月30日

查看全文
  • Jean Jefferson Moraes da Silva,
  • Marcos Natan da Silva Lima,
  • Pedro Henrique Lamarão Souza,
  • Carlos Augusto Silva de Oliveira,
  • Igor Frota de Vasconcelos,
  • João Marcos da Silva Nunes,
  • Samuel Filgueiras Rodrigues,
  • Hamilton Ferreira Gomes de Abreu

摘要

Maraging steels are known to achieve the best mechanical properties when aged around 480 °C. However, the precipitate formation process is still not straightforward enough at this temperature. In this research, Mössbauer spectroscopy, complemented with transmission electron microscopy, x-ray diffraction, hardness measurements, and optical microscopy techniques, was used to investigate the phase transformation process of solution-treated and 480 °C-aged Maraging-300 steel specimens. The results indicated that the precipitation of intermetallic compounds starts at the early stages of aging and that these precipitates are Fe-free, which are responsible for improving mechanical properties. Atomic mobility is discussed, and precipitate formation is evidenced. Small amounts of reverted austenite due to precipitate dissolution were detected at longer aging times, and the formation of paramagnetic iron-rich phases is also suggested.