Numerical Simulation and Defects Analyses of Titanium Aluminide Based Alloys Powder Forging

2011 ◽  
Vol 337 ◽  
pp. 192-197
Author(s):  
Wei Zhang ◽  
Yong Liu ◽  
Ming Yang Zhang
Keyword(s):  
Numerical Simulation ◽  
Titanium Aluminide ◽  
Deformation Process ◽  
Stress And Strain ◽  
Deformation Characteristics ◽  
Important Method ◽  
Plastic Deformation Process ◽  
Plastic Forming ◽  
Al Powder ◽  
Deform 3D

Powder forging is an important method for behaviors in a closed die, including the net shape. In order to study the deformation characteristics, the closed die block forging of Ti-Al powder preforms was simulated by commercial plastic forming software DEFORM-3D, using a change of temperature, stress and strain at different regions of the billet. Based on distributions of the stress and strain, the occurrence of defects was analyzed. It indicates that some defects may occur near the edge of preform during the plastic deformation process. At last, the predicted results were evaluated by experiments.

Numerical Simulation of Precision Forming for Blade Rotor Based on DEFORM

2011 ◽  
Vol 130-134 ◽  
pp. 2388-2391
Author(s):  
Fang Liu ◽  
Lu Yun Zhang
Keyword(s):  
Numerical Simulation ◽  
Metal Flow ◽  
Flow Rule ◽  
Stress And Strain ◽  
Deformation Characteristics ◽  
Forming Process ◽  
Plastic Forming ◽  
Deform 3D

In order to study the deformation characteristics of the blade rotor in the precision forming, by means of the plastic forming software DEFORM-3D, the forming process is simulated. It is concluded that (1) the change of the stress and strain in different stages was simulated during the entire forming process. (2) Based on the stress and strain distributions, the analysis of the metal flow rule and the mechanism of the filling mold was proceeded to find that the properties of the blade rotor can be enhanced by means of the precision forming.

Plastic Crushing Behavior of Thin-Walled Spheres

2008 ◽  
Vol 33-37 ◽  
pp. 719-724
Author(s):  
P. Xue ◽  
J.P. He ◽  
Yu Long Li
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Plastic Deformation ◽  
Finite Element ◽  
Deformation Process ◽  
Experimental Result ◽  
Plastic Deformation Process ◽  
Post Buckling ◽  
Thin Walled ◽  
Crushing Behavior

Plastic crushing behavior of thin-walled spheres under various loading cases is studied using Finite Element Method. The entire plastic deformation process is tracked during the post-buckling process. The results are compared with the experimental results reported in literature [13], and very good agreements between the numerical simulation and the experimental result are achieved.

The Numerical Simulation of Multi-Directional Forging EQ153 Steering Knuckle

2013 ◽  
Vol 321-324 ◽  
pp. 230-233 ◽  
Author(s):  
Zhi Ming Zhou ◽  
Yang Hu ◽  
Li Wen Tang ◽  
Bao Liang Zhang ◽  
Jing Luo ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Deformation Process ◽  
Effective Strain ◽  
Lower Pressure ◽  
Load Prediction ◽  
Draft Angle ◽  
Near Net Shape ◽  
Net Shape Forming ◽  
Deform 3D

This paper centers on EQ153 steering knuckle multi-directional forging forming, and applying Deform-3D to simulation the deformation process. According to temperature, effective strain, load prediction and final forging shape to illustrate in such a process a near-net-shape forming with no flash and little draft angle and lower pressure is been formed.

Study on Hot Compression of Ti75 Alloy Based on DEFORM-3D

2012 ◽  
Vol 201-202 ◽  
pp. 1088-1091
Author(s):  
Jun Fan ◽  
Lei Gang Wang
Keyword(s):  
Numerical Simulation ◽  
Hot Compression ◽  
Die Design ◽  
Work Piece ◽  
Stress And Strain ◽  
Know How ◽  
Forging Die ◽  
Deform 3D

The filling capability is important for forging die design, which influences the quality and life of the die. To obtain the know-how of the deficiency for the filling capability, numerical simulation was performed to analyze the hot compression of Ti75 alloy with DEFORM-3D. In the simulation, the reducing height and work-piece dimensions remain the same. We obtained the results including the process of hot compression, the forming behavior of the work-piece and the effect of work-piece dimensions on the distribution of the stress and strain.

Numerical Simulation of Extrusion of Hollow Profiles from Mg-Li Alloy

2015 ◽  
Vol 641 ◽  
pp. 210-217
Author(s):  
W. Libura ◽  
Artur Rękas ◽  
Mateusz Milczanowski ◽  
Katarzyna Milczanowska
Keyword(s):  
Numerical Simulation ◽  
Magnesium Alloys ◽  
Metal Flow ◽  
Aviation Industry ◽  
Stress And Strain ◽  
Optimal Temperature ◽  
Die Geometry ◽  
3D Software ◽  
Lithium Alloys ◽  
Deform 3D

Magnesium is the lightest metal used for construction elements. Due to their lightness and good mechanical properties magnesium alloys have been used in aviation industry since 50’s of the last century. Magnesium – Lithium alloys are the lightest of all magnesium alloys. Their density can be lower than 1,0 g/cm3. In this paper the results of numerical simulation of direct extrusion of Mg-Li alloy hollow profile are presented. The alloy has 12% addition of Lithium and has been extruded through porthole dies. The analysis of temperature distribution, metal flow and stress and strain with the use of Finite Element Method (FEM) have been calculated in Deform 3D software. The mathematical simulation have been performed for various ingot temperatures and the die’s geometry. Thanks to numerical simulation, the optimal temperature and die geometry have been determined and due to this fact the optimal stress conditions in a welding chamber have been obtained

Hot Compression Simulation of Ti75 Alloy Based on DEFORM-3D

2012 ◽  
Vol 229-231 ◽  
pp. 55-58
Author(s):  
Jun Fan
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Method ◽  
Hot Compression ◽  
Strain Rates ◽  
Know How ◽  
Numerical Simulation Method ◽  
Control Objective ◽  
Finite Element Numerical Simulation ◽  
Deform 3D

To obtain the know-how of the deficiency for the filling capability, taking Ti75 alloy as the research object, at the same height of reducing, strain rates during forming as the control objective, the finite element numerical simulation method was used to simulate the hot compression with DEFORM-3D, analyzing the effect of the strain rates on the distribution of strain and stress.

scholarly journals A Dislocation-Based Theory for the Deformation Hardening Behavior of DP Steels: Impact of Martensite Content and Ferrite Grain Size

2010 ◽  
Vol 2010 ◽  
pp. 1-16 ◽  
Author(s):  
Yngve Bergström ◽  
Ylva Granbom ◽  
Dirk Sterkenburg
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
Deformation Process ◽  
Volume Fraction ◽  
High Energy ◽  
Martensite Content ◽  
Plastic Deformation Process ◽  
Deformation Hardening ◽  
Dp Steels ◽  
Ferrite Grain Size

A dislocation model, accurately describing the uniaxial plastic stress-strain behavior of dual phase (DP) steels, is proposed and the impact of martensite content and ferrite grain size in four commercially produced DP steels is analyzed. It is assumed that the plastic deformation process is localized to the ferrite. This is taken into account by introducing a nonhomogeneity parameter, f(ε), that specifies the volume fraction of ferrite taking active part in the plastic deformation process. It is found that the larger the martensite content the smaller the initial volume fraction of active ferrite which yields a higher initial deformation hardening rate. This explains the high energy absorbing capacity of DP steels with high volume fractions of martensite. Further, the effect of ferrite grain size strengthening in DP steels is important. The flow stress grain size sensitivity for DP steels is observed to be 7 times larger than that for single phase ferrite.

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