Formability of Tailored Welded Blanks in Single Point Incremental Forming Process

Rattanachan, Kittiphat; Sirivedin, Kumpanat; Chungchoo, Chatchapol

doi:10.4028/www.scientific.net/amr.979.339

Cited by 11 publications

(8 citation statements)

References 8 publications

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“…However, due to the strain rate reported in FSW which is much higher than the SPIF process, the decrease in grain size in the weld area is due to the high strain created in the welding process. The amount of strain created in the FSW process is about 50 to 200, while for the SPIF process it is about 1 to 2 [28], 45]. In this study, the effective strain value in simulation of the SPIF process was about 1.15.…”

Section: Microstructural Observationsmentioning

confidence: 52%

“…Previous studies, Rattanachan et al [28] and Ambrogio et al [19], found that the maximum forming angle of the FSWed samples reduces compared to the BM, and Tayebi et al [23] reported the FSW process has no considerable negative effects on the wall angle of 5083 and 6061 alloys. Ambrogio et al [19] reported that the maximum forming angle in the FSW sample is reduced compared to BM AA6181 sheet.…”

Section: Experimental Test Of Spif Processmentioning

confidence: 94%

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Formability study and metallurgical properties analysis of FSWed AA 6061 blank by the SPIF process

et al. 2021

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In this study, in order to obtain the maximum possible formability in tailor-welded blank AA6061 sheets connected by the friction stir welding (FSW) procedure, the incremental sheet forming process has been utilized. The results are presented both numerically and experimentally. To obtain the forming limit angle, the base and FSWed sheets were formed in different angles with conical geometry, and ultimately, the forming limit angle for the base metal and FSWed sheet is estimated to be 60° and 57.5°, respectively. To explore the effects of welding and forming procedures on AA6061 sheets, experimental studies such as mechanical properties, microstructure and fracture analysis are carried out on the samples. Also, the thickness distribution of the samples is studied to investigate the effect of the welding process on the thickness distribution. Then, the numerical process was simulated by the ABAQUS commercial software to study the causes of the FSWed samples failure through analyzing the thickness distribution parameter, and major and minor strains and the strain distribution. Causes of failure in FSWed samples include increased minor strain, strain distribution and thickness distribution in welded areas, especially in the proximity of the base metal area.

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Section: Microstructural Observationsmentioning

confidence: 52%

Section: Experimental Test Of Spif Processmentioning

confidence: 94%

Formability study and metallurgical properties analysis of FSWed AA 6061 blank by the SPIF process

et al. 2021

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“…In SPIF method, there is nothing under the sheet, the forming is done without chipping, and it is performed through local pressure inserted from the tool on the sheet [5]. The material flow is controlled through the tool movement, and TWBs behavior in SPIF is totally different from what happened in other traditional processes [6]. Kim and Park [7] studied the process parameters of aluminum sheet formability by SPIF process.…”

Section: Introductionmentioning

confidence: 99%

“…The results obtained by these authors confirmed that SPIF of FSW blanks brings about the possibility of producing complex metal parts with high formability potentials. Rattnachan et al [6] performed an investigation on the formability of TWBs blanks produced from the two materials St37 and SUS304 in SPIF. The purpose of their study was to investigate the formability of TWBs at weld zone for forming semi-circle samples.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Formability of Tailor-Welded Blanks in Incremental Forming

Leavoli

Gorji

Bakhshi-Jooybari

et al. 2020

IJE

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Steel laser tailor-welded blanks (TWBs) are produced by end-to-end joining of base sheets using different welding methods. In this article, the formability of laser TWBs of St12 and St14 with thicknesses of 1 mm and 1.5 in single point incremental forming process were experimentally and numerically investigated. First, the forming limit wall angle was experimentally determined for each of the base sheets. Then, SPIF of TWBs samples was carried out at the thinner sheet wall angle; 67°. For numerical investigation, the mechanical properties of the weld zone were obtained. For one combination of TWBs, the finite element (FE) simulation of incremental forming was performed by the use of ABAQUS/Explicit FE software. The simulation process was validated by comparing the results with those of experiments. Then, the effect of SPIF on thickness, stress and strain distribution of other combinations of TWBs was numerically investigated. The results showed that using the FE model, the SPIF of TWBs without performing high cost experimental tests can be properly investigated. Also, the results revealed that in steel laser TWBs with different thicknesses, the maximum and minimum principal strains are concentrated at the corners and the walls of the thinner sheet of TWBs, respectively. Hence, the maximum amount of effective strain is concentrated at the thinner side of TWBs corners and the weld zone of the two blanks. For the same reason, rupture is observed at these regions.

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“…It was concluded that the combination of SPIF and TWB technology will lead to the exciting results in the domain of metal forming. It was also stated that forming behavior of the TWBs during the forming process depends upon the material properties of parent metals [16,17]. It is a well-known fact that the FE analysis leads to save the important resources like material and time.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on forming behavior of friction stir tailor welded blanks (FSTWBs) during single-point incremental forming (SPIF) process

Marathe

Raval

2019

J Braz. Soc. Mech. Sci. Eng.

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Tailor welded blank (TWB) is a product which is developed by joining two or more than two materials having same/different thickness and/or properties before any forming process. The method to join the materials can be any of the conventional or advanced methods. TWB offers advantages like overall weight and cost reduction in a product. Despite of such advantages, the application of TWBs is partially resisted by the disadvantages associated with it like formability reduction and weld line movement during the forming operations. A lot of effort has been done in order to overcome the mentioned limitations of the TWBs. However, for homogeneous blank, single-point incremental forming (SPIF) results in better formability so in present work, the attempt has been made to study the forming behavior of TWB during the SPIF process. In this work, the effect of TWB material parameters like yield strength ratio, thickness ratio, strength coefficient ratio and strain index ratio of the parent materials has been investigated on the weld line movement and % thinning of the blank through finite element analysis. In order to perform the numerical analysis, ABAQUS/Explicit was used. Using SPIF, round cup geometry is formed from a flat TWB and effect of different initial positions of tool is investigated. It has been found that when the forming process is started from the weld and tool is travelled toward strong material of the blank, it leads to the minimum thinning, weld line shift and plastic equivalent strain (PEEQ).

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Formability of Tailored Welded Blanks in Single Point Incremental Forming Process

Cited by 11 publications

References 8 publications

Formability study and metallurgical properties analysis of FSWed AA 6061 blank by the SPIF process

Formability study and metallurgical properties analysis of FSWed AA 6061 blank by the SPIF process

Investigation on Formability of Tailor-Welded Blanks in Incremental Forming

Numerical investigation on forming behavior of friction stir tailor welded blanks (FSTWBs) during single-point incremental forming (SPIF) process

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