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<p>The influence of Sn on the microstructure, mechanical properties, and solidification process of Fe-12Cr-6Al-2Mo-0.5Nb-0.1Y-xSn (<i>x</i> = 0, 0.15) alloys was investigated. The addition of Sn refined the grains of the alloy, resulting in an increase in hardness and strength at room temperature. The internal stress of the containing-Sn alloy was reduced during solidification, which inhibited the formation of microcracks in the ingot. The addition of Sn did not significantly worsen the high-temperature tensile strength of the alloys, especially above 1000 °C. The fracture surface shrinkage of both alloys at high temperatures and different strain rates exceeded 80%, indicating excellent hot workability. The addition of Sn improved the microstructure and properties of the FeCrAl alloy, which played an important role in the further study of FeCrAl alloys for fuel cladding materials.</p>

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Effect of Sn Microalloying on the Microstructure and Properties of FeCrAl Alloy for Nuclear Fuel Cladding

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Jie Pan,
  • Lizhen Zhan,
  • Xudong Zhao,
  • Chao Zhang,
  • Ping Cao,
  • Cheng Su,
  • Cong Li,
  • Jun Li,
  • Xueshan Xiao

摘要

The influence of Sn on the microstructure, mechanical properties, and solidification process of Fe-12Cr-6Al-2Mo-0.5Nb-0.1Y-xSn (x = 0, 0.15) alloys was investigated. The addition of Sn refined the grains of the alloy, resulting in an increase in hardness and strength at room temperature. The internal stress of the containing-Sn alloy was reduced during solidification, which inhibited the formation of microcracks in the ingot. The addition of Sn did not significantly worsen the high-temperature tensile strength of the alloys, especially above 1000 °C. The fracture surface shrinkage of both alloys at high temperatures and different strain rates exceeded 80%, indicating excellent hot workability. The addition of Sn improved the microstructure and properties of the FeCrAl alloy, which played an important role in the further study of FeCrAl alloys for fuel cladding materials.