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Influence of delta phase precipitation on static recrystallization of cold-rolled Inconel 718 alloy in solid solution treatment

Authors
  • Ye, Neng-yong1, 2
  • Cheng, Ming1, 3
  • Zhang, Shi-hong1
  • Song, Hong-wu1
  • Zhou, Hong-wei3
  • 1 Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China , Shenyang (China)
  • 2 Taizhou University, School of Mechanical Engineering, Taizhou, Zhejiang, 318013, China , Taizhou (China)
  • 3 Lanzhou University of Technology, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou, Gansu, 730050, China , Lanzhou (China)
Type
Published Article
Journal
Journal of Iron and Steel Research International
Publisher
Springer Singapore
Publication Date
Jan 09, 2019
Volume
26
Issue
2
Pages
148–153
Identifiers
DOI: 10.1007/s42243-018-0219-8
Source
Springer Nature
Keywords
License
Yellow

Abstract

Due to the improvement in fatigue strength of cold-rolled blades, the static recrystallization behavior of cold-rolled Inconel 718 alloy in the solid solution treatment was investigated with the methods of optical microscopy and electron backscattered diffraction. The effect of δ phase precipitation on the static recrystallization process was also analyzed. The results show that δ phase preferentially precipitates comparing to static recrystallization. Affecting by the δ phase preferential precipitation process, sub-grain migration is the main nucleation mechanism in the static recrystallization of cold-rolled Inconel 718 alloy at 980 °C. Meanwhile, strain-induced boundary migration also exists as an aided nucleation mechanism when the rolling reduction is less than 30%.

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