Inverse analysis applied to the evaluation of material parameters in the history dependent flow stress equation in hot forming of metals

1996 ◽  
Vol 60 (1-4) ◽  
pp. 455-461 ◽  
Author(s):  
J. Kusiak ◽  
R. Kawalla ◽  
M. Pietrzyk ◽  
H. Pircher
Keyword(s):  
Flow Stress ◽  
Inverse Analysis ◽  
Hot Forming ◽  
Stress Equation ◽  
Material Parameters ◽  
Dependent Flow ◽  
Flow Stress Equation

Finite Element Analysis for the Tube Sinking Process of the Micro Ti-0.2Pd Tube

2013 ◽  
Vol 465-466 ◽  
pp. 693-698 ◽  
Author(s):  
Seok Kwan Hong ◽  
Jeong Jin Kang ◽  
Jong Deok Kim ◽  
Heung Kyu Kim ◽  
Sang Yong Lee ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Flow Stress ◽  
Internal Surface ◽  
External Diameter ◽  
Stress Equation ◽  
Element Analysis ◽  
Simulation Error ◽  
Simulation Results ◽  
Flow Stress Equation

In this study, the tube sinking process for manufacturing the micro Ti-0.2Pd tube (2.4 mm external diameter, 0.4 mm thickness) was simulated by finite element analysis. The external diameter of the initial tube was 5.0 mm. In order to simulate the tube sinking process, the flow stress equation was deducted from the result of the tensile test and friction coefficient was indirectly obtained through the parameter studies. The simulation results showed the simulation error according to the change of diameter predicted to be less than 2%. The defect of the internal surface by stress was found through the experiment result.

Effect of aging on hardness in the upsetting tests using experimental and finite element investigations

2016 ◽  
Vol 231 (24) ◽  
pp. 4512-4520 ◽  
Author(s):  
Ch Hari Krishna ◽  
MJ Davidson ◽  
Ch Nagaraju
Keyword(s):  
Finite Element ◽  
Flow Stress ◽  
Equivalent Strain ◽  
Stress Equation ◽  
Cold Upsetting ◽  
Finite Element Software ◽  
Aging Conditions ◽  
Metal Hardness ◽  
Flow Stress Equation ◽  
Good Agreement

This paper investigates the hardness distribution in cold upsetting operation of the aged billets. Three sets of cylindrical billets were solutionized at 504 ℃ and then each set of billets were aged at 150 ℃ for a period of 9 h, 13 h, and 18 h, respectively. The billets were upset to different levels of strain and flow stress equation was evaluated for all the aging conditions. The flow stress equation was given as input to the finite element software and simulated to the same level of strain as in the case of experiments. An attempt to predict metal hardness was made by correlating the equivalent strain with the hardness. The hardness measurements predicted were in good agreement with the experimental results. The demand for producing billets with more hardness on the surface and softness inside encourages this investigation to measure hardness experimentally and theoretically.

New flow-stress equation of Ti6Al4V alloy

1995 ◽  
Vol 48 (1-4) ◽  
pp. 179-186 ◽  
Author(s):  
Yoshino Masahiko ◽  
Shirakashi Takahiro
Keyword(s):  
Flow Stress ◽  
Stress Equation ◽  
Flow Stress Equation

scholarly journals Determination of flow stress equation of Al–Mg alloy for sheet metal forming analysis

2015 ◽  
Vol 65 (11) ◽  
pp. 568-572 ◽  
Author(s):  
Toru Kazaoka ◽  
Keiko Natori ◽  
Ryo Matsumoto ◽  
Hiroshi Utsunomiya
Keyword(s):  
Flow Stress ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Mg Alloy ◽  
Stress Equation ◽  
Forming Analysis ◽  
Flow Stress Equation

Thermal Deformation Behavior of 1Cr12Ni3Mo2VNbN Alloy and Its Application in the Blade Forging

2010 ◽  
Vol 139-141 ◽  
pp. 605-609 ◽  
Author(s):  
Jie Zhong ◽  
Chen Guo ◽  
Peng Yue ◽  
Chun Liang Long
Keyword(s):  
Numerical Simulation ◽  
Flow Stress ◽  
Thermal Deformation ◽  
Production Efficiency ◽  
Simulation Technology ◽  
Stress Equation ◽  
Blade Forging ◽  
Design Cycle ◽  
Equipment Wear ◽  
Flow Stress Equation

Thermal deformation flow stress equation of 1Cr12Ni3Mo2VNbN in the temperature range of 980 °C~1180 °C is established by means of hot simulation test and the regression analysis. The results show that the data obtained accords with hyperbolic sine function and the equation will also enrich the material performance database. The established equation is used in the blade forging production based on numerical simulation technology, and the numerical simulation results show that utilizing flat head billet can solve the problem of filling dissatisfaction at the root of the blade. Adopting water-based graphite lubricant provides better lubrication condition for blade forging. The equipment wear and energy consumption can be reduced by applying initial forging temperature of 1130°C in the blade forging process. The application of thermal deformation flow stress equation and numerical simulation technology can reduce the number of trial production, shorten the process design cycle and improve production efficiency in a large extent.

Flow stress equation for multipass hot-rolling of aluminum alloys

2001 ◽  
Vol 8 (1) ◽  
pp. 13-17 ◽  
Author(s):  
Hui Zhang ◽  
Da-shu Peng ◽  
Li-bin Yang ◽  
Li-ping Meng
Keyword(s):  
Flow Stress ◽  
Aluminum Alloys ◽  
Hot Rolling ◽  
Stress Equation ◽  
Flow Stress Equation
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