Surface Profile Simulation during Plane Strain Compression by Crystal Plasticity Finite Element Method

With the technology advancement, crystal plasticity finite element modeling becomes more and more popular in the simulation of metal forming process. In order to obtain a better understanding of the difference between the Taylor model and finite element model during the simulation of metal forming process, an implicit time-integration procedure with the two polycrystal models is applied in the commercial finite element code ABAQUS to simulate the plane strain compression separately. FCC metal is used in this study. The simulation shows that the two polycrystal models both can predict the compression process approximately. The two modelling results of surface roughness show an agreement with that of the experimental results. However, the side profile calculated by the Taylor polycrystal model is much steeper and straighter than that of finite element polycrystal model. The experimental surface roughness curve shows a high frequency fluctuation. It is much steeper than those of the two models. The simulation results also show that the von Mises stress from the Taylor model is much higher than that of the finite element model.

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Effect of Marangoni Convection on Welding Pool of Plasma Direct Metal Forming Finite Element Model

Materials Science Forum ◽

10.4028/www.scientific.net/msf.704-705.674 ◽

2011 ◽

Vol 704-705 ◽

pp. 674-679

Author(s):

Dan Xia ◽

Bin Shi Xu ◽

Yao Hui Lv ◽

Yi Jiang ◽

Cun Long Liu

Keyword(s):

Experimental Data ◽

Finite Element ◽

Finite Element Model ◽

Metal Forming ◽

Molten Pool ◽

Marangoni Convection ◽

Element Model ◽

Metal Powders ◽

Forming Process ◽

Metal Forming Process

With considering the Marangoni convection in the molten pool on plasma direct metal forming process, a finite element model posed to describe and reflect the flow in the molten pool. Results of temperature distribution modeling prepared by plasma direct metal forming process of metal powders in an Ar environment were numerically obtained and compared with experimental data. Powders of Fe314 and base plates of R235 steel were taken as sample materials. In the experiment a multi-stream nozzle capable of delivering metal powder coaxially with the plasma arc was used. The model revealed that the velosity of the front part of the pool is a little slower than aft part. Marangoni convection reinforced the convection and enhanced the heat transfer. Profile of the model is the same as the experimental data. This allows us to conclude that the model can be applied for preselecting the process parameters. Keywords: plasma, rapid forming, temperature field, Marangoni convection.

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Multi-scale crystal plasticity finite element model approach to modeling nickel-based superalloys

Acta Materialia ◽

10.1016/j.actamat.2013.07.038 ◽

2013 ◽

Vol 61 (17) ◽

pp. 6549-6561 ◽

Cited By ~ 70

Author(s):

Shahriyar Keshavarz ◽

Somnath Ghosh

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Crystal Plasticity ◽

Element Model ◽

Crystal Plasticity Finite Element ◽

Multi Scale ◽

Model Approach

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Coupled Simulation of the Static Recrystallization in Hot Deformed Austenite on Mesoscale

Materials Science Forum ◽

10.4028/www.scientific.net/msf.558-559.1213 ◽

2007 ◽

Vol 558-559 ◽

pp. 1213-1218

Author(s):

Cheng Wu Zheng ◽

Na Min Xiao ◽

Dian Zhong Li ◽

Yi Yi Li

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Crystal Plasticity ◽

Microstructure Evolution ◽

Static Recrystallization ◽

Element Model ◽

Stored Energy ◽

Coupled Simulation ◽

Crystal Plasticity Finite Element ◽

Stored Energy Of Deformation

The kinetics and microstructure evolution during static recrystallization (SRX) of hot-deformed austenite in a low carbon steel are simulated by coupling a cellular automaton (CA) model with a crystal plasticity finite element model (CPFEM). The initial deformed characteristics, which include the stored energy of deformation and the crystallographic orientation induced by a plane strain hot compression are simulated using a crystal plasticity finite element model. These data are mapped onto the CA regular lattices as the initial parameters for SRX simulation. The coupled simulation results reveal that the heterogeneous distribution of the stored energy of deformation results in non-uniform nucleation and a slower kinetics. The influence of non-uniform distribution in stored energy on the SRX kinetics and microstructure evolution is discussed based on a microstructural path (MP) analysis.

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