Numerical Investigation on Single Point Incremental Forming (SPIF) of Tailor Welded Blanks (TWBs)

Raut, Jeet; Marathe, Shalin; Raval, Harit K.

doi:10.1007/978-981-32-9487-5_4

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…Therefore, the sheet properties may not be exactly the same and some minor differences many exist in the two sides of TWBs. Some researchers reported that during SPIF of TWBs, the weld line will be shifted toward one side of TWBs [16,19], but the in the present study, as can be seen from Figures 19, 22, 23a, and 24a, it is shown that in SPIF of laser TWBs, there is no weld line movement.…”

Section: Numerical Results Of Incremental Forming Of Twbscontrasting

confidence: 65%

“…The purpose of their study was to investigate the formability of TWBs at weld zone for forming semi-circle samples. Raut et al [19] carried out a numerical investigation on SPIF of TWBs and concluded that the maximum value of von Mises stress and equivalent plastic strain is found at the corner of the component being formed during the SPIF process. The TWBs in their study were made from AA554 and AA0552 using FSW technique.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Numerical Results Of Incremental Forming Of Twbscontrasting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Investigation on Formability of Tailor-Welded Blanks in Incremental Forming

Leavoli

Gorji

Bakhshi-Jooybari

et al. 2020

IJE

View full text Add to dashboard Cite

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“…Tailored blanks offer a potential route for generating preforms for optimising forming. Raut et al [ 15 ] designed aluminium and steel blanks with areas of thicker and stronger material in zones of expected higher stress and loading to reduce part weight without compromising strength. AM reinforcements have been seen to offer better final part properties than other types of tailored blanks due to the full metallurgical bonding between deposit and substrate [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Tailoring Titanium Sheet Metal Using Laser Metal Deposition to Improve Room Temperature Single-Point Incremental Forming

2022

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Typically, due to their limited formability, elevated temperatures are required in order to achieve complex shapes in titanium alloys. However, there are opportunities for forming such alloys at room temperature using incremental forming processes such as single-point incremental forming (SPIF). SPIF is an innovative metal forming technology which uses a single tool to form sheet parts in place of dedicated dies. SPIFs ability to increase the forming limits of difficult-to-form materials offers an alternative to high temperature processing of titanium. However, sheet thinning during SPIF may encourage the early onset of fracture, compromising in-service performance. An additive step prior to SPIF has been examined to tailor the initial sheet thickness to achieve a homogeneous thickness distribution in the final part. In the present research, laser metal deposition (LMD) was used to locally thicken a commercially pure titanium grade 2 (CP-Ti50A) sheet. Tensile testing was used to examine the mechanical behaviour of the tailored material. In addition, in-situ digital image correlation was used to measure the strain distribution across the surface of the tailored material. The work found that following deposition, isotropic mechanical properties were obtained within the sheet plane in contrast to the anisotropic properties of the as-received material and build height appeared to have little influence on strength. Microstructural analysis showed a change to the material in response to the LMD added thickness, with a heat affected zone (HAZ) at the interface between the added LMD layer and non-transformed substrate material. Grain growth and intragranular misorientation in the added LMD material was observed. SPIF of a LMD tailored preform resulted in improved thickness homogeneity across the formed part, with the downside of early fracture in a high wall angle section of the sheet.

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Numerical Investigation on Single Point Incremental Forming (SPIF) of Tailor Welded Blanks (TWBs)

Cited by 2 publications

References 9 publications

Investigation on Formability of Tailor-Welded Blanks in Incremental Forming

Investigation on Formability of Tailor-Welded Blanks in Incremental Forming

Tailoring Titanium Sheet Metal Using Laser Metal Deposition to Improve Room Temperature Single-Point Incremental Forming

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