Mechanical Behavior of AZ31B Magnesium Alloy Sheet at Different Strain Rates and Stress States

2016 ◽  
Vol 867 ◽  
pp. 3-7
Author(s):  
Chun Sheng Ma ◽  
Hai Long Fu ◽  
Hao Li ◽  
Xiao Luo ◽  
Yang Li ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Response Characteristic ◽  
Alloy Sheet ◽  
Test Method ◽  
Mg Alloys ◽  
Mg Alloy ◽  
Strain Rates ◽  
Compression Properties ◽  
Wide Range ◽  
Stress States

This Magnesium (Mg) alloys have been increasingly used in the automotive industry due to their superior mechanical properties compared with other metals. While there are some obstacles in the application of Mg alloy, one of that is its complex dynamic response characteristic. Many papers have studied the tensile and compression properties of AZ31B Mg alloys sheet, but lack of shear test. This paper presents experimental study, including the test method and test data analysis, on the AZ31B Mg alloy sheet. Uniaxial tension tests were carried out over a wide range of strain rates from to , which are of interest in vehicle crash CAE. At the same time uniaxial compression and shear tests at strain rates from to were also carried out. The different mechanical behavior of AZ31B Mg alloys sheet between tensile, compression and shear stress states can also be studied in this paper.

Mechanical behavior of DP780 dual phase steel at a wide range of strain rates

2018 ◽  
Vol 5 (9) ◽  
pp. 096519 ◽  
Author(s):  
Shengci Li ◽  
Lan Zhang ◽  
Hongjin Zhao ◽  
Liang Qi ◽  
Yonglin Kang
Keyword(s):  
Mechanical Behavior ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Strain Rates ◽  
Wide Range

scholarly journals Dynamic Mechanical Characteristics and Constitutive Modeling of Rail Steel over a Wide Range of Temperatures and Strain Rates

2019 ◽  
Vol 2019 ◽  
pp. 1-15
Author(s):  
Peijie Liu ◽  
Yanming Quan ◽  
Guo Ding
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Split Hopkinson Pressure Bar ◽  
Rail Steel ◽  
Strain Rates ◽  
Dynamic Mechanical ◽  
Flow Response ◽  
Strain And Strain Rate ◽  
Average Absolute Relative Error ◽  
Wide Range

Rail steel plays an indispensable role in the safety and stability of the railway system. Therefore, a suitable constitutive model is quite significant to understand the mechanical behavior of this material. Here, the compressive mechanical behavior of heat-treated U71Mn rail steel over a wide range of strain rates (0.001 s−1–10000 s−1) and temperatures (20°C–800°C) was systematically investigated via uniaxial quasistatic and dynamic tests. The split Hopkinson pressure bar (SHPB) apparatus was utilized to perform dynamic mechanical tests. The effects of temperature, strain, and strain rate on the dynamic compressive characteristics of U71Mn were discussed, respectively. The results indicate that the flow response of U71Mn is both temperature-sensitive and strain rate-sensitive. However, the influence of temperature on the flow response is more remarkable than that of strain rate. On the basis of the experimental data, the original and modified Johnson-Cook (JC) models of the studied material were established, respectively. Using correlation coefficient and average absolute relative error parameters, it is revealed that better agreement between the experimental and predicted stress is reached by the modified JC model, which demonstrates that the modified one can characterize the mechanical behavior of the studied material preferably.

Deformation Behavior of Fine Grained Al-Mg Alloy under Biaxial Stress

2006 ◽  
Vol 503-504 ◽  
pp. 475-480 ◽  
Author(s):  
Masafumi Noda ◽  
Kunio Funami
Keyword(s):  
Grain Boundary ◽  
Tensile Deformation ◽  
Grain Boundary Sliding ◽  
Biaxial Stress ◽  
Mg Alloy ◽  
Strain Rates ◽  
Fine Grained ◽  
Biaxial Tensile ◽  
Wide Range ◽  
Boundary Sliding

The grain boundary sliding and the formation of slipped bands and cavitations during biaxial tensile deformation were examined in fine grained Al-Mg alloy. Biaxial tensile testing was conducted with cruciform specimens at initial strain rates of 10-4 to 101s-1. It was found that at the same equivalent strain conditions, the number of cavities under biaxial tension is significantly greater than that under uniaxial tension. A greater prevalence of slipped bands and grain separations were clearly observed under biaxial stress than under uniaxial stress. It was suggested that development of slipped bands resulted from the formation of elongated cavities and multiple deformed bands under biaxial stress. Additionally, the m-value under biaxial stress remained at about 0.3 over a wide range of strain rates. The effects of grain separation and formation of cavities were related to the motion of grain boundary sliding, grain size and loading conditions.

scholarly journals Influence of grain size distribution on the mechanical behavior of light alloys in wide range of strain rates

2017 ◽  
Author(s):  
Vladimir A. Skripnyak ◽  
Natalia V. Skripnyak ◽  
Evgeniya G. Skripnyak ◽  
Vladimir V. Skripnyak
Keyword(s):  
Grain Size ◽  
Mechanical Behavior ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Strain Rates ◽  
Light Alloys ◽  
Wide Range

Mechanical behavior of microstructure engineered multi-length-scale titanium over a wide range of strain rates

2013 ◽  
Vol 61 (10) ◽  
pp. 3781-3798 ◽  
Author(s):  
W.H. Yin ◽  
F. Xu ◽  
O. Ertorer ◽  
Z. Pan ◽  
X.Y. Zhang ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Length Scale ◽  
Strain Rates ◽  
Wide Range

Deep Drawing of Ti6Al4V: Experiments and Modeling over a Wide Range of Strain Rates and Temperatures

2013 ◽  
Vol 554-557 ◽  
pp. 190-194 ◽  
Author(s):  
Benjamin Chartrel ◽  
Elisabeth Massoni
Keyword(s):  
Finite Element ◽  
Mechanical Behaviour ◽  
Tensile Tests ◽  
Numerical Approach ◽  
Alloy Sheet ◽  
Image Correlation ◽  
Strain Rates ◽  
Analysis Model ◽  
Joule Effect ◽  
Wide Range

A combined experimental-numerical approach using digital image correlation (DIC) and finite element simulation in order to get the temperature dependent mechanical behaviour is presented. Results from a series of experiments on a Ti6Al4V titanium alloy sheet are shown. Tensile tests were carried out on specimens along 3 different orientations in order to characterise the material anisotropy. The strain-rates are varied from 10-1 to 10-2 s-1 while observations are made at temperatures from 903 to 1003 K. The samples are heated by Joule effect, which allows to use the image correlation in order to obtain the deformation fields and thus the coefficients of Lankford [1]. Differences in the responses of this alloy are observed in terms of work hardening, strain rate and temperature sensitivities. The Norton-Hoff model and the Hill [2] criterion are used to effectively simulate the observed responses obtained from these experiments. An inverse analysis model using kriging meta-model [3] is applied to determine each parameter of the mechanical behaviour law. The model, with the constants determined from these experiments, is then used to predict the mechanical behaviour of Ti6Al4V. Thus, the model is implemented into the implicit finite element code Forge® to model forming of thin-walled structures. The predictions are found to be very close to the observations.

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