Effects on dynamic and metadynamic recrystallization on microstructures of wrought IN-718 due to hot deformation

Zhou, Liying; Baker, T. N.

doi:10.1016/0921-5093(94)09717-8

Cited by 59 publications

(31 citation statements)

References 16 publications

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“…On the other hand, some investigations on the hot deformation behaviours of IN718 superalloy have been carried out from the point view of microstructural evolution in recent years [33][34][35][36][37][38][39][40][41][42][43]. Zhou and Baker [33] studied the microstructural evolution behaviour during dynamic and metadynamic recrystallisation processes by using hot compression tests.…”

Section: Introductionmentioning

confidence: 99%

Flow characteristics and intrinsic workability of IN718 superalloy

Chen

Liu

et al. 2015

Materials Science and Engineering: A

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a b s t r a c tThis study focuses on deformation characteristics of superalloy IN718 by formulation of a new flow stress model and detailed evaluation of intrinsic workability through the generation of three-dimensional (3D) processing maps with the support of optical microstructural observations. Based on thermomechanical simulation tests using a Gleeble-1500 machine, the flow stress model for superalloy IN718 was built and the flow stress throughout the entire deformation process was described by a peak stress only depending on Zener-Hollomon parameter and strain. The developed model exhibited the strain softening due to dynamic recrystallisation (DRX). The intrinsic workability was further investigated by constructing 3D processing maps. The 3D processing maps described the variations of the efficiency of power dissipation and flow instability domains as a function of strain rate, temperature and strain, from which the favourite deformation conditions for thermomechanical processing of IN718 can be established.

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Section: Introductionmentioning

confidence: 99%

Flow characteristics and intrinsic workability of IN718 superalloy

Chen

Liu

et al. 2015

Materials Science and Engineering: A

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“…Better control of the thermomechanical processing is of great importance for superalloy 718 to obtain a superior performance. It has been reported that dynamic recrystallization (DRX) is the responsible mechanism for hot restoration during high temperature deformation of superalloy 718 [1][2][3]. The microstructural characterization and recrystallization behavior in hot deformed superalloy 718 have been extensively studied using hot torsion or hot compression experiments [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution during dynamic recrystallization of hot deformed superalloy 718

Wang

Shao

Zhen

et al. 2008

Materials Science and Engineering: A

190

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“…At the deformation conditions of high temperature and high strain rate, the deformation microstructure is mostly metadynamic recrystallization microstructure. It is reported that [21,22], metadynamic recrystallization grain size is considerably larger than dynamic recrystallization grain under the same deformation conditions, higher temperature and strain rate will both promote metadynamic recrystallization, causing the recrystallization grain growth as increasing strain rate at higher temperature. Above all, dynamic recrystallization grains refinement of spray formed GH738 can be obtained by deformation at high strain rate and higher temperature (1 s -1 , 1040 ºC).…”

Section: Microstructure Evolution Of Spray Formed Gh738mentioning

confidence: 97%

Hot deformation behavior and microstructure evolution of spray formed GH738 superalloy

Liu

Zhang

2011

Rare Metals

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In order to evaluate the deformation characteristics of spray formed superalloy GH738, the hot compression test was conducted on Gleeble-3500 thermal mechanical simulator at a temperature range of 960 -1120 ºC, and a strain rates range of 0.1, 1.0 s -1 with engineering strain 50%. The flow stress data at various hot working conditions was obtained, and the influence of deformation temperature and strain rate on the microstructure evolution of spray formed GH738 was analyzed. The result shows that, the flow stress improves with the increasing of strain rate and the decreasing of temperature, the yield drop is observed on true stress-strain curves at strain rate of 1.0 s -1 . The temperature and strain rate have a strongly effect on dynamic recrystallization. Higher temperature could efficiently promote the process of dynamic recrystallization, as the increment of temperature, the dynamic recrystallization grain size shows the tendency of growth. Higher strain rate is better for grain refinement.

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Effects on dynamic and metadynamic recrystallization on microstructures of wrought IN-718 due to hot deformation

Cited by 59 publications

References 16 publications

Flow characteristics and intrinsic workability of IN718 superalloy

Flow characteristics and intrinsic workability of IN718 superalloy

Microstructure evolution during dynamic recrystallization of hot deformed superalloy 718

Hot deformation behavior and microstructure evolution of spray formed GH738 superalloy

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