Scholarlink

<p>This article examines the structure–phase state of Zr – 2.5Nb alloy subjected to prolonged low-temperature neutron irradiation in a water coolant using x-ray diffraction analysis and scanning electron microscopy (SEM), including electron backscattered diffraction (EBSD). The results demonstrate that zirconium hydrides with the γ(ZrH) and δ(ZrH<sub>1.66</sub>) phases are formed both along grain boundaries and within the bulk of α(α′)-phase crystallites. These phases manifest as isolated plates, chains, or large clusters, depending on the initial microstructure and phase composition of the alloy. In all cases, specific orientation relationships are observed between the matrix α/α′/β phases and the hydride phases. A fracture analysis of welded Zr – 2.5Nb joints containing a high concentration of hydride phases revealed a brittle failure accompanied by characteristic cleavage facets.</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

Influence of Hydrogenation on the Structure–Phase State of Zr – 2.5Nb Alloy

  • 期刊论文

  • 发表日期：

    2025年9月1日

查看全文
  • V. Yu. Yarkov,
  • V. I. Pastukhov,
  • S. A. Averin,
  • V. A. Tsygvintsev,
  • S. V. Solovieva

摘要

This article examines the structure–phase state of Zr – 2.5Nb alloy subjected to prolonged low-temperature neutron irradiation in a water coolant using x-ray diffraction analysis and scanning electron microscopy (SEM), including electron backscattered diffraction (EBSD). The results demonstrate that zirconium hydrides with the γ(ZrH) and δ(ZrH1.66) phases are formed both along grain boundaries and within the bulk of α(α′)-phase crystallites. These phases manifest as isolated plates, chains, or large clusters, depending on the initial microstructure and phase composition of the alloy. In all cases, specific orientation relationships are observed between the matrix α/α′/β phases and the hydride phases. A fracture analysis of welded Zr – 2.5Nb joints containing a high concentration of hydride phases revealed a brittle failure accompanied by characteristic cleavage facets.