Computer modeling of the continuous forming extrusion process of AA6061 alloy

Lü, Jianyun; Saluja, N.; Rivière, A.; Yong-song, Zhou

doi:10.1016/s0924-0136(98)00011-9

Cited by 26 publications

(8 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the very beginning of the process, a round rod is pushed into the groove and deformed to conform to the shape of the groove. This stage of deformation resembles the forging/upsetting process since the circular cross‐section of the feedstock is deformed to a rectangular shape mainly by compression 18, 19. Due to the velocity difference between the stationary shoe and the rotating wheel, considerable shearing between layers of material along the radial direction also occurs.…”

mentioning

confidence: 99%

Universal Approach for Structural Interpretation of QSAR/QSPR Models

Polishchuk

Кузьмин

Artemenko

et al. 2013

Molecular Informatics

View full text Add to dashboard Cite

In this paper we offer a novel approach for the structural interpretation of QSAR models. The major advantage of our developed methodology is its universality, i.e., it can be applied to any QSAR/QSPR model irrespective of chemical descriptors and machine learning methods applied. This universality was achieved by using only the information obtained from substructures of the compounds of interest to interpret model outcomes. Reliability of the offered approach was confirmed by the results of three case studies, including end-points of different types (continuous and binary classification) and nature (solubility, mutagenicity, and inhibition of Transglutaminase 2), various fragment and whole-molecule descriptors (Simplex and Dragon), and multiple modeling techniques (partial least squares, random forest, and support vector machines). We compared the global contributions of molecular fragments obtained using our methodology with known SAR rules derived experimentally. In all cases high concordance between our interpretation and results published by others was observed. Although the proposed interpretation approach could be easily extended to any type of descriptors, we would recommend using Simplex descriptors to achieve a larger variety of investigated molecular fragments. The developed approach is a good tool for interpretation of such "black box" models like random forest, neural networks, etc. Analysis of fragment global contributions and their deviation across a dataset could be useful for the identification of key fragments and structural alerts. This information could be helpful to maximize the positive influence of structural surroundings on the given fragment and to decrease the negative effects.

show abstract

mentioning

confidence: 99%

Universal Approach for Structural Interpretation of QSAR/QSPR Models

Polishchuk

Кузьмин

Artemenko

et al. 2013

Molecular Informatics

View full text Add to dashboard Cite

show abstract

“…For the CEP, a mathematical model was made to predict stress, temperature, strain rate, and strain areas within the work material. Signifcant CEP process control and enhancement data were made available [7]. Te material fow and processing parameters were afected by changes in tool geometrical parameters in the CEP.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Deformation Behaviors during Continuous Forming Extrusion of C18150 Copper Alloy through Response Surface Methodology

Desta,

Sinha,

Ramulu

2023

Journal of Optimization

View full text Add to dashboard Cite

Continuous extrusion (CE) is a method of creating endless profiles of high-quality products of dimensional accurateness, high productivity, and excellent material properties. The main objective of this study is to investigate the influence of CE input process parameters on optimal overall extrusion load requirement and effective stress induced. The input parameters considered were extrusion driving wheel speed, feed metal temperature, tool temperature, and factor of friction proceeding. Numerical simulations of a copper alloy (C18150) were carried out using DEFORM-3D to investigate the impact of the input variables on total load and effective stresses. A mathematical model based on response surface methodology (RSM) was developed for optimized results. The optimized parameters in terms of wheel extrusion velocities, feedstock temperatures, tool temperatures, and friction factors expressed. The ANOVA test was performed to assess the suitability and appropriateness of the model. Using RSM, the optimal load value of 408.167 kN and effective stress of 1241.0 MPa were achieved within the composite preference of 1.0. A load of 408.167 kN had been obtained if the velocity of the wheel, temperatures of feedstock, tool temperatures, and factors of friction are 4 rpm, 500°C, 400°C, and 0.85, respectively. The minimum effective stress of 1241.0 MPa is induced in the feedstock due to the CE process if the velocity of the wheel, temperature of the feedstock, die temperature, and frictional factor were 4 rpm, 500°C, 400°C, and 0.95, respectively.

show abstract

“…This process needs no extra heating, thus saving energy. In addition, products with unlimited length can be manufactured, and the material utilization rate can reach more than 95% [2][3][4]. Therefore, continuous extrusion has been extensively applied for nonferrous alloys such as AM60 Mg [5], Al−Mg−Si [6], Cu−Te [7], Al−Fe−Cu [8], and Al−13Si−7.5Cu−Mg [9].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Flat and U-Shaped Copper Strips Produced by Continuous Extrusion

Zhou

Yun

et al. 2022

Materials

View full text Add to dashboard Cite

The differences between flat and U-Shaped pure copper strips during a continuous extrusion process were investigated and analyzed through finite element simulation and experimentation. The simulation results showed that nearly all of the temperature-, velocity-, and loading-force-related parameters of the U-Shaped product at the die exit were smaller than those of the flat product, which indicated that extruding U-Shaped copper strips by continuous extrusion was superior to the flat strips. This conclusion was further verified experimentally by measuring the temperature and torque force. Then, a comparative analysis of the microstructure of the two cases was carried out. The average grain size of the U-Shaped strips was 65.6 µm, which was smaller than that of the flat strips, which was 96.7 µm. In addition, the microstructure of the U-Shaped strips was more uniform and had a higher recrystallization ratio, which can be attributed to the even and severe plastic deformation. This study thus solves the size limitation issue that existed in continuous extrusion.

show abstract

Computer modeling of the continuous forming extrusion process of AA6061 alloy

Cited by 26 publications

References 5 publications

Universal Approach for Structural Interpretation of QSAR/QSPR Models

Universal Approach for Structural Interpretation of QSAR/QSPR Models

Optimization of Deformation Behaviors during Continuous Forming Extrusion of C18150 Copper Alloy through Response Surface Methodology

A Comparative Study on Flat and U-Shaped Copper Strips Produced by Continuous Extrusion

Contact Info

Product

Resources

About