Optimization of laser welding of DP/TRIP steel sheets using statistical approach

Reisgen, Uwe; Schleser, Markus; Mokrov, Oleg; Ahmed, Essam

doi:10.1016/j.optlastec.2011.06.028

Cited by 53 publications

(15 citation statements)

References 13 publications

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“…HI plays a crucial role in the quality of the joint and indirectly the operation cost. The weld joint quality can be defined as weld bead geometry, mechanical properties and distortions [25]. Weld bead geometry, which means the bead width and penetration depth, is an important physical characteristic of a weldment, especially for dissimilar laser welding processes [19].…”

Section: Optimization Of the Process Parameters Via The Taguchi Methodsmentioning

confidence: 99%

“…It is believed that the level range of this parameter caused this situation due to the range of the spot diameters being quite small. As known weld bead dimensions directly affect the TL of the joints [25], at insufficient HI at the low laser power levels or high welding speeds, adequate penetration did not occur, and the TL of the joints was decreased. Besides, at excessive HI levels, the HAZ would be wider, and that causes a decrease in TL.…”

Section: Effects Of Process Parameters On the Responsementioning

confidence: 99%

“…The authors developed models and stated that, in terms of weld bead dimensions, the most influential parameter was welding speed. Reisgen et al [25] optimized the parameters of the laser welded DP and TRIP steels to obtain the highest mechanical strength and minimum operation costs. Zhao et al [26] investigated the effects of prescribed gap and laser welding parameters on the weld bead profile of galvanized steel sheets in a lap joint format and developed regression models.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Optimization of Process Parameters and Microstructural Characterization of Fiber Laser Welded Dissimilar HSLA and MART Steel Joints

Yüce

Tutar

Karpat

et al. 2016

Metals

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Nowadays, environmental impact, safety and fuel efficiency are fundamental issues for the automotive industry. These objectives are met by using a combination of different types of steels in the auto bodies. Therefore, it is important to have an understanding of how dissimilar materials behave when they are welded. This paper presents the process parameters' optimization procedure of fiber laser welded dissimilar high strength low alloy (HSLA) and martensitic steel (MART) steel using a Taguchi approach. The influence of laser power, welding speed and focal position on the mechanical and microstructural properties of the joints was determined. The optimum parameters for the maximum tensile load-minimum heat input were predicted, and the individual significance of parameters on the response was evaluated by ANOVA results. The optimum levels of the process parameters were defined. Furthermore, microstructural examination and microhardness measurements of the selected welds were conducted. The samples of the dissimilar joints showed a remarkable microstructural change from nearly fully martensitic in the weld bead to the unchanged microstructure in the base metals. The heat affected zone (HAZ) region of joints was divided into five subzones. The fusion zone resulted in an important hardness increase, but the formation of a soft zone in the HAZ region.

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Section: Optimization Of the Process Parameters Via The Taguchi Methodsmentioning

confidence: 99%

Section: Effects Of Process Parameters On the Responsementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Optimization of Process Parameters and Microstructural Characterization of Fiber Laser Welded Dissimilar HSLA and MART Steel Joints

Yüce

Tutar

Karpat

et al. 2016

Metals

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“…Several works were devoted to the laser welding of different DP steels, such as DP600, DP780, DP800, DP980, DP1000, and DP1180 grades with a different portion of ferrite and martensite phases [1, 3, 10, 11, 18, 22, 23, 25-28, 30, 33-36]. Other works were focused on laser welding of DP steels with HSLA [2,31,32] and TRIP steels [2,9,13,[37][38][39][40][41][42], but fewer works were focused on welding of DP steels with CP steels. The microstructure in the sub-zones of welded joints has been studied to define properties of welded joints.…”

Section: Introductionmentioning

confidence: 99%

Microstructural characteristics of fibre laser welded joint of dual phase steel with complex phase steel

Švec¹,

Schrek²,

Dománková³

2018

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Microstructures in the sub-zones of butt joint consisting of dual phase DP980 steel and complex phase CP780 steel with a thickness of 1.5 mm welded using fibre laser process were evaluated. The microstructure in the fusion zone was built of an approximately equal portion of martensite and lower bainite. In both coarse-grained heat affected zones near DP980 and CP780 steel dominant presence of lath martensite and a minor portion of lower bainite were observed. Similar microstructures were created in both fine-grained heat affected zone near DP980 and near CP780 steel but with the presence of ferrite and tempered martensite in region heated to lower peak temperatures. Mainly M3C carbides precipitated in lower bainite, and mostly MX carbonitrides precipitated in martensite. Created microstructures corresponded with microhardness profile across the joint. The highest microhardness of 476 HV0.1 was measured in the coarse-grained region of the heat affected zone near DP980 steel with a high portion of martensite.

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“…Reisgen et al (85) carried out a numerical and graphical optimization of the CO 2 laser beam welding of dual phase (DP600)/ transformation induced plasticity (TRIP700) steel sheets using RSM based on BBD. The aim of the optimization study was to improve the weld quality, increase the productivity, and minimize the total operation cost by adjusting the welding parameters of laser power, welding speed, and focus position.…”

Section: Weld Bead Mechanical Properties and Operating Costmentioning

confidence: 99%

Mathematical Modeling of Weld Phenomena, Part 2

Olabi

Alaswad

Benyounis

2014

Comprehensive Materials Processing

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Optimization of laser welding of DP/TRIP steel sheets using statistical approach

Cited by 53 publications

References 13 publications

The Optimization of Process Parameters and Microstructural Characterization of Fiber Laser Welded Dissimilar HSLA and MART Steel Joints

The Optimization of Process Parameters and Microstructural Characterization of Fiber Laser Welded Dissimilar HSLA and MART Steel Joints

Microstructural characteristics of fibre laser welded joint of dual phase steel with complex phase steel

Mathematical Modeling of Weld Phenomena, Part 2

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