Microstructure-properties correlation in fiber laser welding of dual-phase and HSLA steels

Saha, Dulal Chandra; Westerbaan, D.; Nayak, S.S.; Biro, E.; Gerlich, A.P.; Zhou, Y.

doi:10.1016/j.msea.2014.04.034

Cited by 97 publications

(55 citation statements)

References 26 publications

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“…Similar results have been reached by other authors [5][6][7][18][19][20]28,29], although they used specimens with transverse laser weld and dissimilar materials were joined. lower values of deformation properties-uniform extension Ag approx.…”

Section: Analysis Of Mechanical Propertiessupporting

confidence: 87%

“…Results of microstructural changes received when similar materials were welded comply with [5][6][7]20]: the fusion zone of dual phase steel consisted of fully martensitic structure; the fusion zone of high strength low alloyed steel consisted of ferrite, bainite and martensite; and the fusion zone of multi-phase steel consisted of martensite with laths oriented randomly. In the heat affected zone of the weld joints ( Figure 13), a mixed martensite-ferrite structure occurs.…”

Section: Analysis Of Microstructurementioning

confidence: 79%

“…In the transition zone between the base metal and heat affected zone, microhardness has not declined markedly, i.e., any substantial soft zone hasn't been found for each material. Otherwise, other researchers identified soft zones when thicker materials with high power were welded [5][6][7]20].…”

Section: Analysis Of Microhardness and Its Distributionmentioning

confidence: 93%

“…The study is focused on the measurement of strength and deformation properties for base material and laser welded by a solid-state fiber laser. Many authors have investigated the influence of laser welding on the tensile properties on specimens with transverse weld [5,6,[18][19][20]. Thus, the research was focused on the specimens with longitudinal butt laser weld, as it is used for tailored TWBs.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Influence of Laser Welding on the Mechanical Properties of Dual Phase and Trip Steels

Evin

Tomáš

2017

Metals

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Nowadays, a wide range of materials is used for car body structures in order to improve both the passengers' safety and fuel consumption. These are joined by laser welding and solid state fiber lasers being used more and more in present. The article is focused on the research of laser welding influence on the mechanical and deformation properties, microstructure and microhardness of advanced high-strength steels: high-strength low-alloyed steel HC340LA, dual phase steel HCT600X and multi-phase residual austenite steel RAK40/70. The proper welding parameters have been found based on weld quality evaluation. The specimens for tensile test with longitudinal laser weld were used to measure mechanical and deformation properties. Microstructure and microhardness of laser welds were evaluated in the base metal, heat affected zone and fusion zone. The higher values of strength and lower ones for deformation properties of laser-welded materials have been found for dual and multi-phase steel. The microhardness strongly depends on the carbon equivalent of steel. Deformation properties are more sensitive than strength properties to the change of microstructure in the fusion zone and heat affected zone.

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Section: Analysis Of Mechanical Propertiessupporting

confidence: 87%

Section: Analysis Of Microstructurementioning

confidence: 79%

Section: Analysis Of Microhardness and Its Distributionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Influence of Laser Welding on the Mechanical Properties of Dual Phase and Trip Steels

Evin

Tomáš

2017

Metals

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“…Although using AHSS steels in the automobile structure is increasing, due to specific mechanical properties, high strength low alloy (HSLA) steel is still mainly used for structural parts, such as cross members, longitudinal beams, chassis components, etc. [2].…”

Section: Introductionmentioning

confidence: 99%

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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Influence of Cu on Microstructure and Mechanical Properties for an Extremely Low Carbon Steel During Isothermal Process

Sun

Zhang

Liu

et al. 2016

steel research int.

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The phase transformation mode, Cu precipitation behavior during isothermal process and their influences on mechanical properties have been comparatively studied in Cu‐free and Cu‐bearing steels. Cu is found to promote massive transformation and shear transformation, and its precipitation occurs during isothermal process. Significant improvements of yield strength by 250 MPa and tensile strength by 290 MPa have been obtained by adding 2.0 wt% Cu at a slight expense of ductility and low temperature toughness. Calculations on the strengthening effect of Cu revealed that about 70% strength increment has been caused by precipitation strengthening effect. The studies on toughening mechanism shows that Cu precipitation is mainly responsible for the deterioration of low temperature toughness.

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Microstructure-properties correlation in fiber laser welding of dual-phase and HSLA steels

Cited by 97 publications

References 26 publications

The Influence of Laser Welding on the Mechanical Properties of Dual Phase and Trip Steels

The Influence of Laser Welding on the Mechanical Properties of Dual Phase and Trip Steels

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

Influence of Cu on Microstructure and Mechanical Properties for an Extremely Low Carbon Steel During Isothermal Process

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