Characterization of alloy 718 subjected to different thermomechanical treatments

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:691

Article

Silva, Chinthaka¹  Song, Miao²  Leonard, Keith¹  Wang, Mi²  Was, Gary²  Busby, Jeremy¹ 

[1] Oak Ridge Natl Lab, Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] Univ Michigan, Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

关键词: Alloy 718;    Gamma phase;    Gamma-prime phase;    Gamma-double prime phase;    Delta phase;    Precipitation hardening;   

DOI  :  10.1016/j.msea.2017.03.045

来源: Elsevier

【 摘 要 】

Chemical phase and microstructural investigations of alloy 718 solution-annealed and age-hardened were performed in this study. Focus was made in the effects of solution annealing temperature, aging temperature and holding time, and the amount of intermediate cold work on the alloy. The formation of secondary phases such as gamma'-phase, gamma ''-phase, and delta-phase, grain sizes, and any deformations of the microstructure with respect to the processed conditions have been studied. 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 gamma'- and gamma ''-phase precipitates is also presented.

【 授权许可】

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