Characterization of alloy 718 subjected to different thermomechanical treatments

Silva, Chinthaka; Song, Miao; Leonard, Keith; Wang, Mi; Was, Gary; Busby, Jeremy

doi:10.1016/j.msea.2017.03.045

Characterization of alloy 718 subjected to different thermomechanical treatments

Journal Article · Sat Mar 11 00:00:00 EST 2017 · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing

DOI:https://doi.org/10.1016/j.msea.2017.03.045· OSTI ID:1360064

Silva, Chinthaka ^[1]; Song, Miao ^[2]; Leonard, Keith ^[1]; Wang, Mi ^[2]; Was, Gary ^[2]; Busby, Jeremy ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology
Univ. of Michigan, Ann Arbor, MI (United States). Nuclear Enigneering and Radiological Sciences

Chemical phase and microstructural investigations of alloy 718 solution-annealed and age-hardened were performed in this study. We focused on the effects of solution annealing temperature, aging temperature and holding time, and the amount of intermediate cold work on the alloy. We also studied the formation of secondary phases such as γ’-phase, γ”-phase, and δ-phase, grain sizes, and any deformations of the microstructure with respect to the processed conditions. Statistics such as size and number densities of these precipitates with respect to the processing conditions were evaluated and a discussion on optimum conditions in obtaining finer and higher density of γ’- and γ”-phase precipitates is also presented.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: Electric Power Research Inst. (EPRI); USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1360064

Journal Information:: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Journal Name: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing Journal Issue: C Vol. 691; ISSN 0921-5093

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (9)

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Cited By (1)

Effect of δ Phase on Microstructure and Hardness of Heat-Affected Zone in TIG-Welded GH4169 Superalloy Wang, Tian-Fu; Di, Xin-Jie; Li, Cheng-Ning Acta Metallurgica Sinica (English Letters), Vol. 32, Issue 8 https://doi.org/10.1007/s40195-018-0861-y	journal	December 2018

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Related Subjects

36 MATERIALS SCIENCE
Alloy 718
Delta phase
Gamma phase
Gamma-double prime phase
Gamma-prime phase
Precipitation hardening

Characterization of alloy 718 subjected to different thermomechanical treatments

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