A generic analysis for high-temperature power-law deformation: the case of linear In (strain rate)-In(stress) relationship

1995 ◽  
Vol 30 (23) ◽  
pp. 5850-5866 ◽  
Author(s):  
S. S. Bhattacharya ◽  
G. V. Satishnarayana ◽  
K. A. Padmanabhan
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Power Law ◽  
Generic Analysis

Influence of High-Temperature Annealing on the Resistance to High Strain Rate and Fracture of Tantalum at Temperatures of 20 and 500°C

2019 ◽  
Vol 64 (5) ◽  
pp. 674-679
Author(s):  
G. V. Garkushin ◽  
A. S. Savinykh ◽  
S. V. Razorenov ◽  
G. I. Kanel
Keyword(s):  
High Temperature ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
High Temperature Annealing

High Temperature Deformation Mechanism Maps of NiAl

2004 ◽  
Vol 449-452 ◽  
pp. 57-60
Author(s):  
I.G. Lee ◽  
A.K. Ghosh
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Deformation Mechanism ◽  
Calculation Method ◽  
Deformation Behavior ◽  
Tensile Tests ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Grain Sizes ◽  
Temperature Strain

In order to analyze high temperature deformation behavior of NiAl alloys, deformation maps were constructed for stoichiometric NiAl materials with grain sizes of 4 and 200 µm. Relevant constitute equations and calculation method will be described in this paper. These maps are particularly useful in identifying the location of testing domains, such as creep and tensile tests, in relation to the stress-temperature-strain rate domains experienced by NiAl.

Deformational behavior of polyolefins at high temperature and strain rate: Experimental analysis and constitutive laws

2000 ◽  
Vol 40 (7) ◽  
pp. 1553-1563 ◽  
Author(s):  
Francesco Briatico-Vangosa ◽  
Marta Rink ◽  
Francesco D'Oria ◽  
Alberto Verzelli
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Experimental Analysis ◽  
Constitutive Laws ◽  
Deformational Behavior

Flow Stress of Low Carbon Steel at High Temperature and Strain Rate (2nd Report)

1978 ◽  
Vol 44 (528) ◽  
pp. 1495-1500
Author(s):  
Katsuhiro MAEKAWA ◽  
Takahiro SHIRAKASHI ◽  
Eiji USUI
Keyword(s):  
High Temperature ◽  
Flow Stress ◽  
Carbon Steel ◽  
Strain Rate ◽  
Low Carbon Steel ◽  
Low Carbon

Applicability of power law for describing the rheology of soils of different origins and characteristics

2009 ◽  
Vol 46 (9) ◽  
pp. 1011-1023 ◽  
Author(s):  
Sueng Won Jeong ◽  
Serge Leroueil ◽  
Jacques Locat
Keyword(s):  
Strain Rate ◽  
Power Law ◽  
Debris Flows ◽  
Rheological Behaviour ◽  
Strain Rate Range ◽  
Rate Dependent ◽  
Different Origins ◽  
Power Law Index ◽  
Soil Behaviour ◽  
Low Activity

The rate-dependent rheological behaviour of soils of different origins and characteristics was studied and the applicability of the power law model was examined. The studied soils were divided into three groups: (i) low-activity soils, (ii) high-activity soils, and (iii) silt-rich soils. The results show that the power law applies to all these soils and is representative of soil behaviour in a strain rate range corresponding to debris flows, which is generally not the case with the Bingham model. For low-activity clays, the power law index, n, is typically equal to 0.12 and seems to increase with the plasticity index; it is larger (i.e., in the range of 0.2–0.6) for silt-rich soils. Comparison of n values for tests performed on intact and remoulded low-activity clay specimens indicates that the power law index is possibly strain-rate dependent.

Deformation Behavior and Constitutive Equation of 42CrMo Steel at High Temperature

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1614
Author(s):  
Hongqiang Liu ◽  
Zhicheng Cheng ◽  
Wei Yu ◽  
Gaotian Wang ◽  
Jie Zhou ◽  
...  
Keyword(s):  
High Temperature ◽  
Flow Stress ◽  
Strain Rate ◽  
Thermal Processing ◽  
Deformation Behavior ◽  
Reduction Process ◽  
Ann Model ◽  
Forming Process ◽  
Temperature Reduction ◽  
42Crmo Steel

High-temperature reduction pretreatment (HTRP) is a process that can significantly improve the core quality of a billet. The existing flow stress data cannot meet the needs of simulation due to lack of high temperature data. To obtain the hot forming process parameters for the high-temperature reduction pretreatment process of 42CrMo steel, a hot compression experiment of 42CrMo steel was conducted on Gleeble-3500 thermal-mechanical at 1200–1350 °C with the rates of deformation 0.001–10 s−1 and the deformation of 60%, and its deformation behavior at elevated temperature was studied. In this study, the effects of flow stress temperature and strain rate on austenite grain were investigated. Moreover, two typical constitutive models were employed to describe the flow stress, namely the Arrhenius constitutive model of strain compensation and back propagation artificial neural network (BP ANN) model. The performance evaluation shows that BP ANN model has high accuracy and stability to predict the curve. The thermal processing maps under strains of 0.1, 0.2, 0.3, and 0.4 were established. Based on the analysis of the thermal processing map, the optimal high reduction process parameter range of 42CrMo is obtained: the temperature range is 1250–1350 °C, and the strain rate range is 0.01–1 s−1.

High temperature high strain rate testing with a compressive SHPB

2003 ◽  
Vol 110 ◽  
pp. 459-464 ◽  
Author(s):  
M. Apostol ◽  
T. Vuoristo ◽  
V.-T. Kuokkala
Keyword(s):  
High Temperature ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
High Strain Rate Testing ◽  
Rate Testing
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