Scholarlink

<p>The study explores the application of hot wire TIG wire arc additive manufacturing, a relatively less explored method for metals, in processing the nickel-based precipitation-hardenable superalloy 740H. This research aims to compare the microstructure and mechanical properties of thin wall specimens in as-built and post three different heat treatment conditions. The microstructure and properties of specimens produced by hot wire TIG WAAM are directional, the analysis focuses on specimens aligned both along and across the build direction. To characterize the microstructure, optical and scanning electron microscopy were employed. Additionally, EDS measurements were conducted to investigate the precipitation behaviour of the material. Mechanical tests, including hardness measurement and tensile testing at room temperature and 760°C, were performed. The findings indicated the favourable quality of wire arc additive manufactured specimens using the H-TIG process. However, discernible differences in orientation, properties, and precipitation behaviour were observed. Prolonged aging demonstrates a close match of properties compared to the as-received 740H plates.</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

Optimizing post-deposition heat treatment in hot wire TIG manufactured Ni-based superalloy 740H

  • 期刊论文

  • 发表日期：

    2025年3月13日

查看全文
  • M Madhu,
  • M Johnson Clawrence,
  • S Jerome,
  • B Shanmugarajan

摘要

The study explores the application of hot wire TIG wire arc additive manufacturing, a relatively less explored method for metals, in processing the nickel-based precipitation-hardenable superalloy 740H. This research aims to compare the microstructure and mechanical properties of thin wall specimens in as-built and post three different heat treatment conditions. The microstructure and properties of specimens produced by hot wire TIG WAAM are directional, the analysis focuses on specimens aligned both along and across the build direction. To characterize the microstructure, optical and scanning electron microscopy were employed. Additionally, EDS measurements were conducted to investigate the precipitation behaviour of the material. Mechanical tests, including hardness measurement and tensile testing at room temperature and 760°C, were performed. The findings indicated the favourable quality of wire arc additive manufactured specimens using the H-TIG process. However, discernible differences in orientation, properties, and precipitation behaviour were observed. Prolonged aging demonstrates a close match of properties compared to the as-received 740H plates.