Effect of electric current on secondary phase dissolution and elements migration behavior of a Ni-based single crystal superalloy

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-07-26 DOI:10.1007/s42243-024-01266-7

Ying-ju Li, Ce Zheng, Xiao-hui Feng, Qiu-yan Huang, Tian-jiao Luo, Yuan-sheng Yang

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Abstract

The second phase dissolution and elements migration behavior of a nickel-based single crystal superalloy during solution heat treatment with direct current were investigated for simplifying and shortening the solution heat treatment of the Ni-based single crystal superalloy. The results showed that the electric current solution heat treatment improved microstructural homogenization as well as the distribution of alloying elements, especially for the refractory metal W and Mo. The microsegregation ratios for Mo and W after electric current solution heat treatment at 1230 °C for 4 h are near those without electric current at 1250 °C for 4 h. The electric current accelerated the γ′ phase dissolution process, and the γ′ phase could be completely dissolved at a lower treatment temperature or within a shorter treatment time under electric current solution heat treatment with direct current. A microcosmic current model was proposed to analyze the effect of the electric current on the solution heat treatment of the Ni-based single crystal superalloy.

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电流对镍基单晶超合金次生相溶解和元素迁移行为的影响

为了简化和缩短镍基单晶超合金的固溶热处理过程，研究了镍基单晶超合金在直流固溶热处理过程中的第二相溶解和元素迁移行为。结果表明，电流固溶热处理改善了微观结构的均匀性以及合金元素的分布，尤其是难熔金属 W 和 Mo 的分布。电流加速了γ′相的溶解过程，在直流电的电流固溶热处理下，γ′相可以在较低的处理温度或较短的处理时间内完全溶解。提出了微观电流模型来分析电流对镍基单晶超合金固溶热处理的影响。

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来源期刊

Journal of Iron and Steel Research International 工程技术-冶金工程

自引率

16.00%

发文量

161

审稿时长

2.8 months

期刊介绍： Publishes critically reviewed original research of archival significance Covers hydrometallurgy, pyrometallurgy, electrometallurgy, transport phenomena, process control, physical chemistry, solidification, mechanical working, solid state reactions, materials processing, and more Includes welding & joining, surface treatment, mathematical modeling, corrosion, wear and abrasion Journal of Iron and Steel Research International publishes original papers and occasional invited reviews on aspects of research and technology in the process metallurgy and metallic materials. Coverage emphasizes the relationships among the processing, structure and properties of metals, including advanced steel materials, superalloy, intermetallics, metallic functional materials, powder metallurgy, structural titanium alloy, composite steel materials, high entropy alloy, amorphous alloys, metallic nanomaterials, etc..