Hot deformation behavior and processing workability of a Ni-based alloy

Wan, Zhipeng; Hu, Lianxi; Sun, Yu; Wang, Tao; Zhao, Li

doi:10.1016/j.jallcom.2018.08.010

Cited by 126 publications

(29 citation statements)

References 44 publications

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“…The cooling rate was about of 20 K/s. The compression stress-strain curves were recalculated to consider friction and adiabatic heating during deformation [34,35]. Processing maps were constructed by B-spline interpolation using OriginLab Software (Version 9.1, Northampton, MA, USA).…”

Section: Methodsmentioning

confidence: 99%

Hot Deformation Behavior of Novel Al-Cu-Y(Er)-Mg-Mn-Zr Alloys

Хомутов

Амер

Barkov

et al. 2021

Metals

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The compression tests in a temperature range of 400–540 °C and strain rates of 0.1–15 s−1 were applied to novel Al-Cu-Y(Er)-Mg-Mn-Zr alloys to investigate their hot deformation behavior. The higher volume fraction of the intermetallic particles with a size of 0.5–4 µm in the alloys caused an increase in flow stress. Hyperbolic sine law constitutive models were constructed for the hot deformation behavior of Al-Cu-Y(Er)-Mg-Mn-Zr alloys. Effective activation energy has a higher value in the alloys with Er than in the alloys with Y. According to the processing maps, the temperature range of 420–480 °C and strain rates higher than 5 s−1 are the most unfavorable region for hot deformation for the investigated alloys. The deformation at 440 °C and 15 s−1 led to cracks on the surface of the sample. However, internal cracks were not observed in the microstructure after deformation. The optimum hot deformation temperatures were in a range of 500–540 °C and at strain rates of 0.1–15 s−1.

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Section: Methodsmentioning

confidence: 99%

Hot Deformation Behavior of Novel Al-Cu-Y(Er)-Mg-Mn-Zr Alloys

Хомутов

Амер

Barkov

et al. 2021

Metals

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“…Materials engineers usually get the optimum working parameters of the alloys by utilizing the hot processing map on the basis of the dynamic materials model (DMM), i.e., Prassad's criterion [19]. It was proven to be an effective tool for understanding the hot deformation behaviors of metallic alloys, such as titanium alloys [20,21], twinning induced plasticity (TWIP) steels [22] and super-alloys [23].…”

Section: Processing Mapsmentioning

confidence: 99%

Hot Deformation Behaviors of the Mg-3Sn-2Al-1Zn Alloy: Investigation on its Constitutive Equation, Processing Map, and Microstructure

Guo

Xuanyuan

et al. 2020

Materials

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In this work, the Mg-3Sn-2Al-1Zn (TAZ321, wt. %) alloy with excellent high temperature resistance was compressed using a Gleeble-3500 thermo-mechanical simulator at a wide temperature and the strain rate range. The kinetics analyses showed that the dominant deformation mechanism was likely caused by the cross slipping of dislocations. A constitutive equation which expressed the relationship between the flow stress, deformation temperature, and strain rate was established, and the average activation energy Q was calculated to be 172.1 kJ/mol. In order to delineate the stability and instability working domains, as well as obtain the optimum hot working parameters of the alloy, the hot processing maps in accordance with Prassad’s criterion are constructed at the true strain of 0.2, 0.4, 0.6, and 0.8, respectively. Based on the hot processing map and microstructure observation, the optimum hot working parameter was determined to be 350 °C/1 s−1. The continuous fine dynamic recrystallization (CDRX) grains occurred in the optimum deformation zone. The predicted instability domains was identified as T = 200–300 °C, ε ˙ = 10−2–1 s−1, which corresponded to the microstructure of deformation twinning and micro cracks at the intersection of grain boundaries.

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“…Many studies have reported that the cracking, flow localization, and dynamic strain aging could result in the flow instability during the hot deformation of the alloys, whereas dynamic recovery, dynamic recrystallization, or superplasticity could lead to a domain with the peak value of η in the processing maps [24,[44][45][46][47]. To further analyze the specific mechanism in each region during hot deformation of the TB8 titanium alloys with two initial grain sizes, the typical microstructures of the TB8 titanium alloys with two initial grain sizes were observed, as shown in Figures 12 and 13.…”

Section: Deformation Microstructure Of Tb8 Titanium Alloysmentioning

confidence: 99%

Initial β Grain Size Effect on High-Temperature Flow Behavior of Tb8 Titanium Alloys in Single β Phase Field

Yang

Tan

et al. 2019

Metals

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The high-temperature flow behavior of TB8 titanium alloys with two different grain sizes was investigated in this present work. Results show that a significant characteristic of stress drop is visible at the start stage of the hot deformation process when the strain rates are 100 and 10−1 s−1. With the further increasing of strain, the flow stress initially rises to a maximum value and subsequently attains a plateau for the strain rates of 100 s−1 and a slight decrease for the strain rates of 10−1 s−1. Only dynamic recovery occurs under these deformation conditions. When the strain rates drop to 10−3 s−1, the dynamic recrystallization takes place during hot deformation. The values of deformation activation energy and materials constants at different strains were calculated. The processing maps at different strains were established for the fine- and coarse-grained alloys. The optimal processing parameter for hot processing was attained to be 900 °C/10−3 s−1 for fine-grained alloys and 950 °C/10−3 s−1 for coarse-grained alloys, respectively.

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Hot deformation behavior and processing workability of a Ni-based alloy

Cited by 126 publications

References 44 publications

Hot Deformation Behavior of Novel Al-Cu-Y(Er)-Mg-Mn-Zr Alloys

Hot Deformation Behavior of Novel Al-Cu-Y(Er)-Mg-Mn-Zr Alloys

Hot Deformation Behaviors of the Mg-3Sn-2Al-1Zn Alloy: Investigation on its Constitutive Equation, Processing Map, and Microstructure

Initial β Grain Size Effect on High-Temperature Flow Behavior of Tb8 Titanium Alloys in Single β Phase Field

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