Elevated Temperature Compression Deformation Behavior of Commercial Pure Zr Combined with the Constitutive Equation and Processing Map

2019 ◽  
Vol 22 (2) ◽  
pp. 1900772 ◽  
Author(s):  
Qingjuan Wang ◽  
Xiangjun Li ◽  
Kuaishe Wang ◽  
Bing Zhang ◽  
Jun Cai ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Constitutive Equation ◽  
Deformation Behavior ◽  
Processing Map ◽  
Compression Deformation

Thermal Deformation Behavior and Critical Conditions of Dynamic Recrystallization of QCr0.8 Alloy

2019 ◽  
Vol 944 ◽  
pp. 38-45
Author(s):  
Shu Yu Yang ◽  
Qiang Song Wang ◽  
Guo Liang Xie ◽  
Dong Mei Liu ◽  
Fang Liu
Keyword(s):  
Constitutive Equation ◽  
Dynamic Recrystallization ◽  
Strain Rate ◽  
Deformation Behavior ◽  
Thermal Deformation ◽  
Processing Map ◽  
Critical Conditions ◽  
Temperature Deformation ◽  
Thermal Compression ◽  
Compression Deformation

In this paper, the flow stresses, the constitutive equation, processing map and the critical conditions of dynamic recrystallization (DRX) of the hot forged QCr0.8 alloy are studied by hot compressive test in the 750-900°C temperature and 0.01-10s-1 strain rate ranges using Gleeble-1500D thermo-mechanical simulator. The compression reduction of thermal compression deformation is 50%. The results show that the thermal deformation temperatures and strain rates have a significant effect on the high temperature deformation behavior of the alloy. The higher the temperature, the smaller the strain rate and the easier the DRX of the alloy is found.The peak stresses of the alloy decreases with the increase of temperature and increases with the increase of the strain rates.The flow stresses during hot deformation can be described by a hyperbolic sine function. The activation energy Q of the thermal compression deformation is determined to be 370.8KJ/mol. The constitutive equation and processing map of the alloy are established. Critical strains of DRX εc are studied by the inflection point characteristic of the lnθ-ε curve of the alloy and the corresponding minimum value of the ∂θ (∂θ)/∂ε-ε curve.

Hot Compression Deformation Behavior of Spray-Formed AlSn20Cu Alloy

2021 ◽  
Vol 1035 ◽  
pp. 189-197
Author(s):  
Bao Ying Li ◽  
Bao Hong Zhu
Keyword(s):  
Constitutive Equation ◽  
Strain Rate ◽  
Deformation Behavior ◽  
Deformation Temperature ◽  
Phase Distribution ◽  
True Stress ◽  
Hot Compression ◽  
Test Machine ◽  
Hot Compression Deformation ◽  
Compression Deformation

The hot deformation behavior of spray-formed AlSn20Cu alloy during hot compression deformation was studied, and the constitutive equation of AlSn20Cu alloy was established. The samples of spray-formed AlSn20Cu alloy were compressed on Gleeble-3500 thermal simulation test machine. The error of the true stress caused by adiabatic heating effect in the experiment was corrected. The constitutive equation of spray-formed AlSn20Cu alloy could be represented by Zener-Hollomon parameter in a hyperbolic sine function. The results showed that the deformation temperatures and strain rates had a notable effect on the true stress of the alloy. At the identical deformation temperature, the true stress increased with the increase of strain rate. When the strain rate was constant, the stress decreased with the increase of deformation temperature. After hot compression deformation, the tin phase was elongated along the direction perpendicular to the compression axis with short strips and blocks. With the increase of deformation temperature and the decrease of strain rate, Sn phase distribution became more homogeneous.

scholarly journals Constitutive Equation and Hot Compression Deformation Behavior of Homogenized Al–7.5Zn–1.5Mg–0.2Cu–0.2Zr Alloy

Materials ◽  
2017 ◽  
Vol 10 (10) ◽  
pp. 1193 ◽  
Author(s):  
Jianliang He ◽  
Datong Zhang ◽  
Weiweng Zhang ◽  
Cheng Qiu ◽  
Wen Zhang
Keyword(s):  
Constitutive Equation ◽  
Deformation Behavior ◽  
Hot Compression ◽  
Hot Compression Deformation ◽  
Compression Deformation

Hot deformation behavior of GH4945 superalloy using constitutive equation and processing map

2017 ◽  
Vol 24 (6) ◽  
pp. 625-633 ◽  
Author(s):  
Zhao-xia Shi ◽  
Xiao-feng Yan ◽  
Chun-hua Duan ◽  
Jin-gui Song ◽  
Ming-han Zhao ◽  
...  
Keyword(s):  
Constitutive Equation ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Processing Map ◽  
Hot Deformation Behavior

Investigation of Compression Deformation Behavior and Microstructure Evolution of NiAl-Cr (Mo)-Hf Alloy at Elevated Temperature

2007 ◽  
Vol 551-552 ◽  
pp. 457-461
Author(s):  
Guo Qing Chen ◽  
S.H. Ji ◽  
Wen Long Zhou ◽  
C.W. Wu ◽  
Jian Ting Guo ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Flow Stress ◽  
Microstructure Evolution ◽  
Deformation Behavior ◽  
Initial Strain Rate ◽  
Deformation Degree ◽  
Maximum Deformation ◽  
Maximum Value ◽  
Compression Deformation ◽  
Nial Matrix

NiAl-based alloy is a promising material applied in the fields of aeronautic and astronautic instruments. In the paper the compression deformation behavior and microstructure evolution of NiAl-Cr(Mo)-Hf alloy at elevated temperature were studied. The results demonstrate that the alloy behaves good formability in the temperature ranging from 1320°C to 1360°C, in which the maximum initial strain rate is about 8.3×10-4s-1 and the maximum deformation resistance is lower than 40MPa. During compression at temperature between 1250°C and 1300°C the flow stress increased sharply with the increasing of the deformation degree. When compression deformation at 1320°C~1360°C, the flow stress decreased obviously and the flow stress decreased slightly after reached the maximum value. By analyzing the microstructure evolution during compression it can be concluded that as-casting microstructure was improved in deformation. The grains were refined and the brittle phases of lamellar Cr(Mo) existing at NiAl matrix were broken. The porosities in as-casting material were eliminated during compression and the density of the material increased. The fracture toughness of the alloy increased from 6.4MPa·m1/2 to 9.8MPa·m1/2 after compression.

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