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<p>Constitutive model of GH4720Li high temperature nickel base alloy at high strain rate and large temperature range</p>

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Title Statement <p>Constitutive model of GH4720Li high temperature nickel base alloy at high strain rate and large temperature range</p>
 
Added Entry - Uncontrolled Name Chen, Jie ; School of Mechatronic Engineering North University of China, Taiyuan, 030 051, China Flight college, Anyang Institute of Technology, Anyang, 455 000, China
Wang, Zhijun ; School of Mechatronic Engineering North University of China, Taiyuan, 030 051, China
Zhang, Haifeng ; Flight college, Anyang Institute of Technology, Anyang, 455 000, China
Zhang, Hongtao ; Flight college, Anyang Institute of Technology, Anyang, 455 000, China
Yang, Qingxiang ; Flight college, Anyang Institute of Technology, Anyang, 455 000, China
Ye, Longhai ; Flight college, Anyang Institute of Technology, Anyang, 455 000, China
The work is supported by School level research and cultivation fund of Anyang Institute of Technology (YPY2019001). Meanwhile, part of the data in this paper was provided bythe “Key laboratory of Aerocraft Simulation Design and Airborne Equipment of Anyan
 
Uncontrolled Index Term materials science
Nickel-based superalloy, High strain rate, Low strain rate, Precipitate, Constitutive equation 
 
Summary, etc. <p style="text-align: justify;">The dynamic mechanical properties of GH4720Li nickel base superalloy under high and low strain rates in a wide temperature range have been studied, and a constitutive model with higher fitting progress have been established. The experimental results show that the abnormal phenomenon of dynamic mechanical properties of GH4720Li alloy appears under the condition of high strain rate. This is because the change of Cr (MO) content in precipitates and the change of precipitate morphology lead to the difference of dynamic mechanical properties of GH4720Li alloy at high and low strain rates. Besides, A new piecewise function model based on a phenomenological representation of the stress-strain curves is proposed to describe the constitutive equation of Nickel-based superalloy GH4720Li of stress-strain curves. Meanwhile, new methods to obtain the material constant k and C are proposed to predicted accurately the flow stress. The comparison between calculated values and experimental values based on the new constitutive modeling shows that these methods for obtaining material constants k and C are valid and the new function model is significant for establishing constitutive equations of Nickel-based superalloy GH4720Li in hot deformation processes.</p>
 
Publication, Distribution, Etc. Indian Journal of Engineering and Materials Sciences (IJEMS)
2022-03-21 14:38:47
 
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http://op.niscair.res.in/index.php/IJEMS/article/view/40660
 
Data Source Entry Indian Journal of Engineering and Materials Sciences (IJEMS); ##issue.vol## 28, ##issue.no## 6 (2021): IJEMS-December 2021
 
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