Finite Element Simulation of Microstructural Evolution during Inertia Friction Welding Process of Superalloy GH4169

2011 ◽  
Vol 675-677 ◽  
pp. 975-978
Author(s):  
Wei Xu ◽  
Li Wen Zhang ◽  
Chong Xiang Yue
Keyword(s):  
Grain Size ◽  
Finite Element ◽  
Microstructural Evolution ◽  
Friction Welding ◽  
Weld Line ◽  
Welding Process ◽  
Equivalent Strain ◽  
Fe Model ◽  
Inertia Friction Welding ◽  
Element Simulation

During the inertia friction welding (IFW) process of superalloy GH4169, the main mechanism for microstructural evolution is dynamic recrystallization (DRX). In order to investigate the microstructural evolution during the process, a finite element (FE) model coupled with the DRX model of the alloy was developed on the platform of MSC.Marc. Equivalent strain was introduced into the DRX model to improve the computational precision. As a result, the IFW process with microstructural evolution was simulated. Simulated results reveal that DRX region is very small. Fully recrystallized region and fine grains appear near the weld line. Dynamically recrystallized fraction (DRXF) decreases and grain size increases with the increase of the distance from the weld line. Predicted results of microstructural distribution agree well with experimental ones.

FE Modeling of the Inertia Friction Welding with a Modified Friction Law

2015 ◽  
Vol 740 ◽  
pp. 55-58
Author(s):  
Quan Zhong Zhang ◽  
Li Fen Hu ◽  
Wu Bin Li ◽  
Jiu Chun Gu
Keyword(s):  
Friction Welding ◽  
Welding Process ◽  
Friction Model ◽  
Friction Torque ◽  
Work Piece ◽  
Fe Model ◽  
Inertia Friction Welding ◽  
Friction Law ◽  
The Subject ◽  
Coulomb Friction Model

The subject of this paper was the presentation of a holistic, fully-temperature-coupled FE model of inertia friction welding based on the modified friction law, which divided the friction welding process into beginning friction stage and steady equilibrium friction stage. At each of the stage Coulomb friction model and shear friction model were adopted respectively. The present FE model predicted the temperature of the welding joint as well as variation of friction torque and relative rotating velocity of the work-piece during the welding process. The evolution of friction torque and rotating velocity were compared with the experimental measurement. They showed a good agreement between them.

The Coupled Thermal Mechanical Modeling of the Inertia Friction Welding Process for Inconel718

2011 ◽  
Vol 704-705 ◽  
pp. 710-716 ◽  
Author(s):  
Wen De Bu ◽  
Jin He Liu
Keyword(s):  
Friction Welding ◽  
Welding Process ◽  
Mechanical Analysis ◽  
Friction Torque ◽  
Interface Temperature ◽  
Deformation Pattern ◽  
Fe Model ◽  
Inertia Friction Welding ◽  
Conservation Of Energy ◽  
True Shape

In this paper, numerical modeling of inertia friction welding (IFW) for Inconel718 was performed using ABAQUS/Explicit with a 3D finite-element (FE) model and the coupled thermo-mechanical analysis. A new thermal input model has been deduced according to the characteristics of IFW and law of conservation of energy. The evolution of temperature field as well as the deformation pattern of the inertia welded joint has been predicted. It is shown that the interface temperature firstly increases rapidly to about 1100 °C within 3 s and then increases slowly. The energy input rate at the interface during the IFW process is closely related to the rotational speed and friction torque of flywheels. The temperature distribution at the interface is very inhomogeneous especially at the initial stage and finally tends to become uniform with the increase of time. Consequently, the flash start to appear as the interface temperature becomes homogeneous relatively and the plastic flow of metal at the interface happens. The verifying trial was carried out and the predicted temperature was compared with the experimental data measured by means of thermocouples. The shape of flash in simulation result was contrasted with the true shape of specimen under the same welding conditions. It is noted that the simulation results agrees well with the experimental results.

The Evaluation of Coefficient of Friction for Representative and Predictive Finite Element Modelling of the Inertia Friction Welding

2009 ◽  
Author(s):  
M. B. Mohammed ◽  
C. J. Bennett ◽  
T. H. Hyde ◽  
E. J. Williams
Keyword(s):  
Finite Element ◽  
Coefficient Of Friction ◽  
Friction Welding ◽  
Mechanical Energy ◽  
Rotational Velocity ◽  
Welding Process ◽  
High Strength ◽  
Weld Interface ◽  
Inertia Friction Welding ◽  
Finite Element Software

Inertia friction welding is the process in which stored kinetic energy in a flywheel is converted to heat by relative sliding movement between surfaces of axi-symmetric components to achieve a weld in the solid-state. The work in this paper relates to the production of dual-alloy shafts for aeroengines. Frictional characteristics determine the conditions at the weld interface and these are controlled by rotational velocity and applied axial pressure. So-called representative and predictive methods have been developed to evaluate friction conditions during the process and these are discussed in this paper. Weld data for the dissimilar weld between a high strength steel and a nickel-based super-alloy were provided by Rolls-Royce and MTU Aero Engines. The finite element software package DEFORM-2D is used to develop coupled thermo-mechanical axi-symmetric models. In previous work, methods employed to evaluate the efficiency of mechanical energy utilised during a weld, a parameter of great importance for numerical analysis, are not clear. Previous predictive approaches have employed test/weld data in one way or another to obtain the interface friction coefficient. This paper proposes a formula that incorporates the value of the mechanical energy efficiency of the welding machine into the calculation of coefficient of friction for representative modelling. It also introduces a predictive approach based on sub-layer flow theory to predict frictional behaviour during the welding process that is independent of test/weld data.

Finite Element Simulation of Linear Friction Welding

2011 ◽  
Vol 411 ◽  
pp. 126-129 ◽  
Author(s):  
Xiao Yu Wu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Friction Welding ◽  
Welding Process ◽  
Welding Parameters ◽  
Linear Friction Welding ◽  
Element Analysis ◽  
Transient Model ◽  
Element Simulation ◽  
Linear Friction

The complete process of linear friction welding of titanium alloy TC17 is simulated using the finite element analysis software ANSYS in this paper. A full structural-thermal coupled transient model is also developed. The results of the temperature field and stress field are discussed. The influence of welding parameters on the temperature field is analyzed. The method will provide guidance for the development of the linear friction welding process.

Efficiency of the Inertia Friction Welding Process and Its Dependence on Process Parameters

2017 ◽  
Vol 48 (7) ◽  
pp. 3328-3342 ◽  
Author(s):  
O. N. Senkov ◽  
D. W. Mahaffey ◽  
D. J. Tung ◽  
W. Zhang ◽  
S. L. Semiatin
Keyword(s):  
Process Parameters ◽  
Friction Welding ◽  
Welding Process ◽  
Inertia Friction Welding

scholarly journals Finite element modelling of microstructural changes during equal channel angular drawing of pure aluminium

2021 ◽  
Author(s):  
Serafino Caruso ◽  
Stano Imbrogno
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
Finite Element ◽  
Size Variation ◽  
Fe Model ◽  
Pure Aluminium ◽  
Continuous Dynamic Recrystallization ◽  
Research Activities ◽  
Hardness Change ◽  
Continuous Dynamic

AbstractGrain refinement by severe plastic deformation (SPD) techniques, as a mechanism to control microstructure (recrystallization, grain size changes,…) and mechanical properties (yield strength, ultimate tensile strength, strain, hardness variation…) of pure aluminium conductor wires, is a topic of great interest for both academic and industrial research activities. This paper presents an innovative finite element (FE) model able to describe the microstructural evolution and the continuous dynamic recrystallization (CDRX) that occur during equal channel angular drawing (ECAD) of commercial 1370 pure aluminium (99.7% Al). A user subroutine has been developed based on the continuum mechanical model and the Hall-Petch (H-P) equations to predict grain size variation and hardness change. The model is validated by comparison with the experimental results and a predictive analysis is conducted varying the channel die angles. The study provides an accurate prediction of both the thermo-mechanical and the microstructural phenomena that occur during the process characterized by large plastic deformation.

Study on Welding Deformation and Residual Stress of H-Section Beam Based on Finite Element Method

2017 ◽  
Vol 753 ◽  
pp. 305-309 ◽  
Author(s):  
Xu Lu
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Finite Element ◽  
Source Parameters ◽  
Welding Process ◽  
Steel Structure ◽  
Bottom Plate ◽  
Welding Deformation ◽  
Element Simulation ◽  
Main Components

The welding H-section beam has good mechanical properties with its superior structure. So they become the main components of steel structure and have been widely used. In this paper, the welded H-section beam is used as the research object. The finite element simulation model is established. The heat source parameters are determined. The deformation of the steel due to the welding process is studied. The results show that the bottom plate and the bottom plate inward bending is about 2.32mm cause by welding process. The residual stress can reach 400MPa.

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