The effect of tube material, microstructure, and heat treatment on process responses of tube hydroforming without axial force

Fatemi, Afshin; Morovvati, M.R.; Biglari, F. R.

doi:10.1007/s00170-013-4727-1

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…1. According to the results of studies [16][17][18][19] we made the assumption that the presence of the phase: α-solid solution of alloying elements in copper. Correlation between characteristics of microstructure of metal and defects was not found.…”

Section: Resultsmentioning

confidence: 99%

Examining of Solid and Liquid Industrial Copper Blanks with Purpose for Quality Control in Respect of Defects of Technological Origin

Tkachuk

Mal'tsev

Чикова

2020

MSF

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Microstructure of ingot and industrial blanks made of copper M2 was examined for quality control. Microstructure was examined by means of traditional metallographic analysis methods. Exogenous nonmetal inclusions and pores in microstructure were found. The transition from exogenous inclusions and pores, which were not removed in initial processing stage, to the crack, which leads to billet destruction on one of last processing stages, is shown. Without quality control of copper blanks by a metallographic method, it is impossible to provide guarantee of reliable operation of machines and responsible purpose constructions. A comparative study of the temperature dependences of the viscosity of the melts of charge materials and finished ingots for copper M2 was carried out. The study of the viscosity of copper melts M2 was carried out with the aim of quality control in the chain of "charge-melt-ingot" at the foundry stage.

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Section: Resultsmentioning

confidence: 99%

Examining of Solid and Liquid Industrial Copper Blanks with Purpose for Quality Control in Respect of Defects of Technological Origin

Tkachuk

Mal'tsev

Чикова

2020

MSF

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“…The tubes with variable cross section were very common parts in the automotive and aircraft industry, and hydroforming the tubes with variable cross section was one of the popular methods used to evaluate the hydroforming characteristics and plastic deformation law for circular tubes [21]. Figure 1 shows the shape and dimensions of the tube with variable diameter.…”

Section: Methodsmentioning

confidence: 99%

Experimental and numerical study on hydroforming characteristics of friction stir welded aluminum alloy tubes

Wang

Pang

et al. 2015

Int J Adv Manuf Technol

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Friction stir welding (FSW), as a solid state joining technique, has emerged as an efficient method for manufacturing tailor-welded blanks to optimize weight or performance in the final component. As the basic design of lightweight frame structures in the automotive and aircraft industry is frequently based on tubular profiles, the joining strategies and forming technologies have to be developed accordingly. In the present study, FSW tube was produced by a novel processing sequence. The plastic deformation characteristics during hydroforming were experimentally and numerically investigated with two types of end condition. The hydroforming performance of the FSW tubes was mainly investigated by die-bulge forming with fixed ends, and the wrinkling behavior during hydroforming was analyzed by employing axial feed on the tube ends. It is found that hydroforming FSW tube is a new deal and does show a few peculiarities. The FSW tube exhibits a spiral weld and the basin-shaped nugget. Finegrained structure is retained during tube forming. The thinning of the tube in axial direction shows M-shaped distribution during hydroforming. The severe thinning is observed at one quarter of the expansion zone from symmetry plane. In the hoop direction, the base material near the weld suffers severe thinning due to the high hoop and axial tensile stress. The thickness distribution greatly depends on the sequence of the contacting die and the variations of the curvature radius of the tube during hydroforming. Moreover, the weld shows an inhibitory effect for the generation of the wrinkles and decreases the number of the wrinkles as compared to the seamless tube during hydroforming. This effect is more obvious when the forming pressure is lower.

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“…Extensive research has been performed analytically, numerically as well as experimentally to analyze the effect of the material properties, geometric characteristics, and loading parameters on the forming quality [3][4][5][6][7][8]. Yang et al [9] investigated the effect of the loading path on the forming result and gave a reasonable range of the loading path in THF process.…”

Section: Introductionmentioning

confidence: 99%

The multi-objective robust optimization of the loading path in the T-shape tube hydroforming based on dual response surface model

Huang

Song

Liu

2015

Int J Adv Manuf Technol

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In this study, a dual response surface model-based multi-objective robust optimization method is introduced to deal with the uncertainties in the tube hydroforming process. The objective of this study is to maximize the protrusion height and minimize the thinning ratio; meanwhile, the variations of the objectives should be minimized. A valid finite element model obtained from experimental result and LS-DYNA is employed to simulate the T-shape tube hydroforming process. To improve computation efficiency, radial basis function combined with Latin hypercube and orthogonal design sampling strategies is employed to construct dual response surface model, which are the mean and standard deviation response of the hydroforming process, respectively. The robust Pareto solutions can be obtained using NSGA-II; meanwhile, the ideal point method is used to obtain the most satisfactory solution from the Pareto solutions for the design engineers. As a conclusion, a significant improvement of the robustness can be achieved; however, the mean performance of the protrusion height has to be sacrificed.

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The effect of tube material, microstructure, and heat treatment on process responses of tube hydroforming without axial force

Cited by 10 publications

References 11 publications

Examining of Solid and Liquid Industrial Copper Blanks with Purpose for Quality Control in Respect of Defects of Technological Origin

Examining of Solid and Liquid Industrial Copper Blanks with Purpose for Quality Control in Respect of Defects of Technological Origin

Experimental and numerical study on hydroforming characteristics of friction stir welded aluminum alloy tubes

The multi-objective robust optimization of the loading path in the T-shape tube hydroforming based on dual response surface model

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