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<p>The effects of varying ingot diameters on the characteristics of round ESR ingots of 282 alloy are evaluated through a&#xa0;combined experimental and modeling study. Ingots of four different diameters—100 mm, 150 mm, 200 mm, and 500 mm, were sectioned and analyzed using metallography to assess spatial variations in dendritic structure (primary/secondary dendrite arm spacings—PDAS/SDAS) across these ingots. Melt parameters of the processes were input into the simulation code, MeltFlow-ESR™ to theoretically predict PDAS/SDAS in the ingots. The values for PDAS/SDAS predicted by the simulations are compared with those measured by experiments and quantitative differences in these values are discussed in the context of the capability and limitations of the model and measurement methods. Both the predicted and measured values show that the PDAS/SDAS values increase with increasing ingot size. In addition, the relation with other ingot characteristics, such as local solidification time as well as the likelihood for freckle formation, are discussed. The implications of these results for down-stream ingot processing and for ingot soundness are discussed.</p>

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Effects of Size on Characteristics of Electroslag Remelted (ESR) HAYNES®282® Alloy Ingots

  • 期刊论文

  • 发表日期：

    2025年1月6日

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  • Ramanathan Krishnamurthy,
  • Michael Fahrmann,
  • Martin Detrois,
  • Paul Jablonski

摘要

The effects of varying ingot diameters on the characteristics of round ESR ingots of 282 alloy are evaluated through a combined experimental and modeling study. Ingots of four different diameters—100 mm, 150 mm, 200 mm, and 500 mm, were sectioned and analyzed using metallography to assess spatial variations in dendritic structure (primary/secondary dendrite arm spacings—PDAS/SDAS) across these ingots. Melt parameters of the processes were input into the simulation code, MeltFlow-ESR™ to theoretically predict PDAS/SDAS in the ingots. The values for PDAS/SDAS predicted by the simulations are compared with those measured by experiments and quantitative differences in these values are discussed in the context of the capability and limitations of the model and measurement methods. Both the predicted and measured values show that the PDAS/SDAS values increase with increasing ingot size. In addition, the relation with other ingot characteristics, such as local solidification time as well as the likelihood for freckle formation, are discussed. The implications of these results for down-stream ingot processing and for ingot soundness are discussed.