Microstructure evolution and dynamic recrystallization mechanism during thermal deformation of GH4698 superalloy

Li, Haizhu; Liu, Xingang; Zhang, Wenwen; Liu, Pengwei; Guo, Shuling; Qin, Heyong; Tian, Qiang

doi:10.1007/s10853-021-06699-z

Cited by 22 publications

(1 citation statement)

References 46 publications

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“…The flow stress obtained from the thermal simulation experiment can not only reflect the performance of the material during processing in a high temperature state but also manifest the change in the microstructure of the material during thermal deformation 1 , 2 . At present, many scholars use the control variable method to obtain the flow curve and apply the flow curve as the basis for further research on the thermal deformation behavior of the material and the mechanism of tissue evolution 3 – 5 . However, during the thermal simulation experiment, the true stress value of the flow curve is calculated under the condition of uniform deformation of the material, which is inconsistent with the actual condition of the material under compression.…”

Section: Introductionmentioning

confidence: 99%

Data correction and verification of thermal simulation experiments under the influence of bulging belly

Zheng,

Xu,

Zou

et al. 2023

Sci Rep

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During the thermal simulation compression test, the formation of an obvious bulge in the specimen leads to a certain deviation between the calculated and actual values of the true stress. The finite element method was used to simulate the single-pass compression of specimens of 34CrNi3MoV steel and obtain the actual nonuniform deformation of the bulging belly during the compression process, and the results were applied to correct experimental flow curves. The results showed that the deformation conditions had a significant influence on the nonuniformity of the specimen deformation during the compression process, and all the modified flow curves were lower than the original ones. The size of the bulge and the metal flow line in the finite element simulation were consistent with the test results. The load value obtained by using the modified flow curve was similar to the load value measured in the test, which indicated that the modified flow curve was very close to the real flow force curve of the material. The method used to modify the flow force curve is simple and practical.

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Section: Introductionmentioning

confidence: 99%