Scholarlink

<p>The influence of Nb segregation on the high-temperature oxidation behavior of Inconel 718 superalloy fabricated by wire arc additive manufacturing (WAAM) at 900&#xa0;°C was investigated. The Nb element segregation in the WAAMed alloy was eliminated by solution treatment at 1080 °C for 1&#xa0;h. The segregation of Nb element leads to a higher weight gain of WAAMed Inconel 718 alloy. The oxidized structure of WAAMed Inconel 718 consists of an outer Cr<sub>2</sub>O<sub>3</sub> layer with trace Ti oxides, an intermediate Nb oxide layer, and an inner Al<sub>2</sub>O<sub>3</sub> oxide layer. Nb oxides exist at the interface between the outer oxide layers and the matrix. Nb segregation leads to a discontinuous Nb-rich oxide barrier at the interface, which reduces the oxidation resistance of WAAMed alloy.</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

Effect of Nb Segregation on High-Temperature Oxidation Behavior of Inconel 718 Superalloy Fabricated by Wire Arc Additive Manufacturing at 900 °C

  • 期刊论文

  • 发表日期：

    2026年3月5日

查看全文
  • Xu Zhang,
  • Wenhui Yuan,
  • Jinhong Liu,
  • Chengzhi Wang,
  • Guiyu Zhai,
  • Liyi Wang,
  • Yajie Chu

摘要

The influence of Nb segregation on the high-temperature oxidation behavior of Inconel 718 superalloy fabricated by wire arc additive manufacturing (WAAM) at 900 °C was investigated. The Nb element segregation in the WAAMed alloy was eliminated by solution treatment at 1080 °C for 1 h. The segregation of Nb element leads to a higher weight gain of WAAMed Inconel 718 alloy. The oxidized structure of WAAMed Inconel 718 consists of an outer Cr2O3 layer with trace Ti oxides, an intermediate Nb oxide layer, and an inner Al2O3 oxide layer. Nb oxides exist at the interface between the outer oxide layers and the matrix. Nb segregation leads to a discontinuous Nb-rich oxide barrier at the interface, which reduces the oxidation resistance of WAAMed alloy.