Development of Precise Load Prediction System for Free Forging of Ni-based Superalloy having Softening

Sakurai, Shingo; Okajima, Takuma; Fujiwara, Masanao; Otake, Takuji; Ishikawa, Takashi

doi:10.1016/j.proeng.2014.10.031

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2016

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“…There has been considerable research concerning this technique. The works of Sokolov and Efimov (Ukraine) (Sokolov 2002; Efimov et al 1992; Sakunai et al 2014; Bang et al 2003) have made significant contributions in this field.…”

Section: Introductionmentioning

confidence: 99%

Calculation of recovery plasticity in multistage hot forging under isothermal conditions

2016

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A widely used method for hot forming steels and alloys, especially heavy forging, is the process of multistage forging with pauses between stages. The well-known effect which accompanies multistage hot forging is metal plasticity recovery in comparison with monotonic deformation. A method which takes into consideration the recovery of plasticity in pauses between hot deformations of a billet under isothermal conditions is proposed. This method allows the prediction of billet forming limits as a function of deformation during the forging stage and the duration of the pause between the stages. This method takes into account the duration of pauses between deformations and the magnitude of subdivided deformations. A hot isothermal upsetting process with pauses was calculated by the proposed method. Results of the calculations have been confirmed with experimental data.

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Section: Introductionmentioning

confidence: 99%