Scholarlink

<p>High-temperature oxidation resistance ensures the lifetime and performance of nickel-based superalloy components operating at high temperatures. Hastelloy X (Hast-X), a solid solution-strengthened nickel-based superalloy, is known for its superior mechanical qualities and resistance to high-temperature oxidation. In some sophisticated industrial applications, these properties make it a possible alternative to the commonly used nickel-based superalloy, Inconel 718 (IN718). This study compares the isothermal oxidation behavior of Hast-X and IN718 thick deposits, which are deposited via a cold spray additive manufacturing process (CSAM). Isothermal oxidation tests conducted at 1100&#xa0;°C for up to 100&#xa0;h revealed that the oxidation kinetics curves of both as-deposited superalloys adhered to the parabolic law. The oxide scales primarily consisted of granular Cr<sub>2</sub>O<sub>3</sub> and outer spinel layers of NiCr<sub>2</sub>O<sub>4</sub>, NiFe<sub>2</sub>O<sub>4</sub>, Fe<sub>2</sub>O<sub>3,</sub> and FeCr<sub>2</sub>O<sub>3</sub>. Additionally, Al<sub>2</sub>O<sub>3</sub> was detected in the oxidized IN718 samples. Despite the finer Cr<sub>2</sub>O<sub>3</sub> grains in IN718, its oxide scales exhibited severe spallation at elevated temperatures. Hast-X has better high-temperature oxidation resistance, which could be attributed to the uniformly distributed dense Cr<sub>2</sub>O<sub>3</sub> and relatively slight exfoliation of oxides in the oxide scales.</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

Comparative study on high-temperature isothermal oxidation behavior of cold spray additively manufactured (CSAM) hastelloy-X and inconel 718 superalloy thick deposits

  • 期刊论文

  • 发表日期：

    2026年2月23日

查看全文
  • Sukhwinder Singh,
  • Ameey Anupam,
  • Harpreet Singh

摘要

High-temperature oxidation resistance ensures the lifetime and performance of nickel-based superalloy components operating at high temperatures. Hastelloy X (Hast-X), a solid solution-strengthened nickel-based superalloy, is known for its superior mechanical qualities and resistance to high-temperature oxidation. In some sophisticated industrial applications, these properties make it a possible alternative to the commonly used nickel-based superalloy, Inconel 718 (IN718). This study compares the isothermal oxidation behavior of Hast-X and IN718 thick deposits, which are deposited via a cold spray additive manufacturing process (CSAM). Isothermal oxidation tests conducted at 1100 °C for up to 100 h revealed that the oxidation kinetics curves of both as-deposited superalloys adhered to the parabolic law. The oxide scales primarily consisted of granular Cr2O3 and outer spinel layers of NiCr2O4, NiFe2O4, Fe2O3, and FeCr2O3. Additionally, Al2O3 was detected in the oxidized IN718 samples. Despite the finer Cr2O3 grains in IN718, its oxide scales exhibited severe spallation at elevated temperatures. Hast-X has better high-temperature oxidation resistance, which could be attributed to the uniformly distributed dense Cr2O3 and relatively slight exfoliation of oxides in the oxide scales.