The evaluate of laser welded tailor and tubular blanks formability for automotive vehicle elements stamping

Hyrcza-Michalska, M.; Grosman, F.

doi:10.1016/s1644-9665(12)60041-7

Cited by 3 publications

(1 citation statement)

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“…Research results of weldability and formability indicate that influence of welded joints on the material plastic flow in the joint area is examined and analyzed by the same kind of tests as are used for evaluation of weldability and formability of base materials, when used for TWBs: tensile tests; braking tests; technological tests (cup drawing tests, Erichsen tests, the Swift method, hydraulic bulge tests, hole expanding test, limit dome height tests and three-or four-point bending tests); macro and microstructure analyses of individual zones of welded joints; hardness tests and Vickers micro-hardness in zones of welded joints and the base material [16,17].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%