title: Study of delta phase on static recrystallization behavior of Inconel 718 alloy.
abstract: The mechanical properties of Inconel 718 alloy depend on its microstructural features. Controlling the grain size during manufacturing is currently achieved through the use of a powerful hot forming process performed at a temperature sufficiently high to induce dynamic recrystallization. The present study proposes an alternative technique to achieve a uniform fine grain structure by using static recrystallization and a proper control of delta precipitation. The results show that a fine structure with an average grain size of ASTM No. 7 can be achieved. And in this study the finest grains yet achievable is ca. 200 nm. As a result, the proposed technique provides a feasible means of controlling the grain size without the need for an energy consumption and technically sophisticated hot forming process.
authors.affiliation: Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan, ROC.
authors.forename: Hwa-Teng
authors.initials: HT
authors.lastname: Lee
authors.forename: Wen-Hsin
authors.initials: WH
authors.lastname: Hou