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Recent progress on evolution of precipitates in Inconel 718 superalloy

Journal Article


Abstract


  • For the manufacture of complicated metallic structural components in power plants, aerospace and defense industry, Inconel 718 superalloy has been widely employed. High-temperature fatigue resistance and creep rupture strength of Inconel 718 superalloy are susceptible to the microstructure evolution in manufacture processing. Previous research work is generally focused on the parameter optimization of hot working processes (directional solidification, heat treatment, forging and welding). Relationships between the cold deformation, hot working, welding and the high-temperature mechanical performance, are seldom discussed, especially in the light of precipitate control. In this work, various types of secondary phases in Inconel 718 alloy are reviewed, including the primary strengthening phase (����� phase), secondary strengthening phase (����� phase), equilibrium phase of ����� phase (�� phase), MX-type carbonitride and Laves phase. Precipitation mechanisms of secondary phases in Inconel 718 alloy are also reviewed, as well as the effects of different types of precipitates on high-temperature performance of the Inconel 718 alloy. With respect to the high-energy electron beam welding of Inconel 718 alloys, factors contributing to the cracking in heat affected zone are indicated.

Publication Date


  • 2016

Citation


  • Liu, Y., Guo, Q., Li, C., Mei, Y., Zhou, X., Huang, Y., & Li, H. (2016). Recent progress on evolution of precipitates in Inconel 718 superalloy. Jinshu Xuebao/Acta Metallurgica Sinica, 52(10), 1259-1266. doi:10.11900/0412.1961.2016.00290

Scopus Eid


  • 2-s2.0-84994512653

Start Page


  • 1259

End Page


  • 1266

Volume


  • 52

Issue


  • 10

Place Of Publication


Abstract


  • For the manufacture of complicated metallic structural components in power plants, aerospace and defense industry, Inconel 718 superalloy has been widely employed. High-temperature fatigue resistance and creep rupture strength of Inconel 718 superalloy are susceptible to the microstructure evolution in manufacture processing. Previous research work is generally focused on the parameter optimization of hot working processes (directional solidification, heat treatment, forging and welding). Relationships between the cold deformation, hot working, welding and the high-temperature mechanical performance, are seldom discussed, especially in the light of precipitate control. In this work, various types of secondary phases in Inconel 718 alloy are reviewed, including the primary strengthening phase (����� phase), secondary strengthening phase (����� phase), equilibrium phase of ����� phase (�� phase), MX-type carbonitride and Laves phase. Precipitation mechanisms of secondary phases in Inconel 718 alloy are also reviewed, as well as the effects of different types of precipitates on high-temperature performance of the Inconel 718 alloy. With respect to the high-energy electron beam welding of Inconel 718 alloys, factors contributing to the cracking in heat affected zone are indicated.

Publication Date


  • 2016

Citation


  • Liu, Y., Guo, Q., Li, C., Mei, Y., Zhou, X., Huang, Y., & Li, H. (2016). Recent progress on evolution of precipitates in Inconel 718 superalloy. Jinshu Xuebao/Acta Metallurgica Sinica, 52(10), 1259-1266. doi:10.11900/0412.1961.2016.00290

Scopus Eid


  • 2-s2.0-84994512653

Start Page


  • 1259

End Page


  • 1266

Volume


  • 52

Issue


  • 10

Place Of Publication