Abstract
This study investigates three processes of multidirectional forging (MDF), namely, closed MDF (CMDF), single-open MDF, and double-open MDF, by using a constitutive equation and a dynamic recrystallization model of hot deformation of the GH4169 superalloy. The microstructure evolution of the three processes is simulated and compared. Among the three processes, the double-open MDF obtains the highest recrystallization degree, followed by the CMDF and the single-open MDF under the same reduction. The recrystallization degree of CMDF reaches 99.5% at 1000 °C and 9 passes, and the average recrystallized grain size is small, which is approximately 8.1 μm. The double-open MDF can obtain a fine grain size of forgings at 9 passes and 1000 °C, and it is easy to obtain forgings with the single-open MDF with uniform performance. The temperature is 850 °C–1000 °C, the compression rate is 0.15–0.2, and the pass is 5–9, which are the suitable parameter selection ranges for the CMDF. The temperature is 950 °C–1000 °C, the compression rate is 0.1–0.2, and the pass is 7–9, which are the suitable parameter selection ranges for single-open MDF. The temperature is 850 °C–1000 °C, the compression rate is 0.1–0.2, and the pass is 6–9, which are the suitable parameter selection ranges for the double-open MDF.
Highlights
The GH4169 superalloy has good high-temperature oxidation and corrosion resistance, and high-temperature strength and good fatigue resistance
The temperature is 850 ◦ C–1000 ◦ C, the compression rate is 0.1–0.2, and the pass is 6–9, which are the suitable parameter selection ranges for the double-open multidirectional forging (MDF)
Theprocess dynamic recrystallization zone begins in the Underas different multidirectional forging conditions, the constraint of the to dieoccur on forging center of the forging
Summary
The GH4169 superalloy has good high-temperature oxidation and corrosion resistance, and high-temperature strength and good fatigue resistance. Zafari et al [18] proposed a single-open multidirectional distribution in titanium carbide and liquid titanium-carbide solution through the establishment of forging process and conducted research on the of about the microstructure evolution of titanium mathematical models. Double-open is proposed, and MDF is forging process and conducted research on the simulation of the microstructure evolution of divided into CMDF, single-open MDF, and double-open MDF. The constitutive equation and dynamic titanium alloy in multidirectional forging On this basis, the double-open is proposed, and recrystallization model of GH4169 superalloy thermal deformation are established in Deform-3D. Deform-3D software, and the software is redeveloped to predict the recrystallization volume during are used to simulate the grain size, recrystallization volume fraction, and strain of three MDF processes. The results are compared and analyzed to guide the design of MDF
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
