Experimental and numerical study on formability of friction stir welded TWB sheets based on hemispherical dome stretch tests

Lee, Wonoh; Chung, Kyung‐Hwan; Kim, Dae-Yong; Kim, Junehyung; Kim, Chongmin; Okamoto, K.; Wagoner, R. H.; Chung, Kwansoo

doi:10.1016/j.ijplas.2008.08.005

Cited by 121 publications

(53 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the weldment has lower ductility than the base material, TWB failure during forming occurs in the weldment [7]. In order to recover formability and strength, the welded sheet is reheated and treated to the T4 or T6 condition by PWHT.…”

Section: Application Of Hfq To Twbmentioning

confidence: 99%

“…The tool was tilted at an angle of 3 ∘ from the normal direction of the sheet toward the trailing direction of the tool. The rotation speed and feed rate of the tool were 1000 RPM and 300 mm/min, respectively, based on the general condition of aluminum alloys [7]. Figure 4 shows the results of the FSW experiment without and with the inclination plate, respectively.…”

Section: Friction Stir Welding Experimentmentioning

confidence: 99%

“…Therefore, friction stir welding (FSW), a solidstate metal joining technology, has been used to produce aluminum TWBs in recent years because it offers various advantages in comparison to conventional fusion welding techniques. FSW produces high quality, dimensionally stable weldments with minimal residual stress or distortion by solid-state metal joining without melting [7,8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improvement of Weldment Properties by Hot Forming Quenching of Friction Stir Welded TWB Sheet

Kim

et al. 2014

Advances in Mechanical Engineering

View full text Add to dashboard Cite

The purpose of this study is to improve the mechanical properties and formability of friction stir welded tailor-welded blanks (TWBs) of Al6061 alloy with a new forming method called hot forming quenching (HFQ) in which solid-solution heat-treated aluminum sheets are formed at elevated temperature. Forming and quenching during HFQ are simultaneously performed with the forming die for the solid-solution heat-treated sheet. In this study, specimens of aluminum TWBs were prepared by friction stir welding (FSW) with a butt joint. The effectiveness of FSW joining was evaluated by observation of the macrostructure for different sheet thicknesses. In order to evaluate the formability of TWBs by HFQ, a hemisphere dome stretching test of the limit dome height achieved without specimen failure was performed with various tool temperatures. A Vickers test was also performed to measure weldment hardness as a function of position. The formability and mechanical properties of products formed by HFQ are compared with those formed by conventional forming methods, demonstrating the suitability of HFQ for sheet metal forming of friction stir welded TWBs.

show abstract

Section: Application Of Hfq To Twbmentioning

confidence: 99%

Section: Friction Stir Welding Experimentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improvement of Weldment Properties by Hot Forming Quenching of Friction Stir Welded TWB Sheet

Kim

et al. 2014

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…This has been compared with numerical simulations and results were quite satisfactory. An interesting work was done by Lee et al (2009) in predicting the forming limit and load-stroke behaviour of FSW blanks. In this investigation, wide variety of automotive sheet materials including 5083-O aluminium alloys sheets were experimentally tested and their forming limit were predicted using M-K model.…”

Section: Formability Studies On Aluminium Twbsmentioning

confidence: 99%

Prediction of Tensile and Deep Drawing Behaviour of Aluminium Tailor-Welded Blanks

Narayanan¹,

Kumar²

2011

Recent Trends in Processing and Degradation of Aluminium Alloys

View full text Add to dashboard Cite

“…Compared to other welding methods, laser welding can create a narrow fusion zone (FZ) and heat-affected zone (HAZ), and has become a widely used welding method of TWBs in the modern automobile industry [2,3]. However, the performance of laser TWBs is greatly reduced due to the existence of welded joints, which limits their application in automobiles [4][5][6][7][8]. Farabi [9] researched the tensile properties of laser TWBs of DP600 steel and the results showed that the hardness increased significantly in the FZ, the yield strength increased and the ultimate tensile strength remained almost unchanged after welding.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties Improvement of Laser Tailor Welded Blanks of DP600 Steel by Magnetic Treatment

Song

et al. 2017

Metals

View full text Add to dashboard Cite

Abstract:The influence of magnetic treatment on the yield strength, the ultimate tensile strength and the elongation of laser tailor welded blanks (TWBs) of DP600 steel was investigated by uniaxial tensile tests. The experimental results showed that the yield strength and the ultimate tensile strength of the TWBs had only a slight change, but the elongation increased by 13.90%-36.23% after the magnetic treatment. The dislocation distributions in the fusion zone (FZ) and the heat-affected zone (HAZ) were observed respectively by transmission electron microscopy (TEM). It was found that after magnetic treatment, the dislocations in both the FZ and the HAZ of the TWBs increased and showed a relatively uniform distribution. The mechanism of the mechanical property improvement of the TWBs by the magnetic treatment was then revealed on the basis of the relationship model between the dislocation and shear strain, considering the evolution of magnetic domains and Frank-Read dislocation multiplication in a magnetic field.

show abstract

Experimental and numerical study on formability of friction stir welded TWB sheets based on hemispherical dome stretch tests

Cited by 121 publications

References 47 publications

Improvement of Weldment Properties by Hot Forming Quenching of Friction Stir Welded TWB Sheet

Improvement of Weldment Properties by Hot Forming Quenching of Friction Stir Welded TWB Sheet

Prediction of Tensile and Deep Drawing Behaviour of Aluminium Tailor-Welded Blanks

Mechanical Properties Improvement of Laser Tailor Welded Blanks of DP600 Steel by Magnetic Treatment

Contact Info

Product

Resources

About