Mechanical and metallurgical properties of pulsed neodymium-doped yttrium aluminum garnet laser welding of dual phase steels

Hazratinezhad, M.; Arab, Nasrollah Bani Mostafa; Sufizadeh, A.R.; Torkamany, M.J.

doi:10.1016/j.matdes.2011.06.070

Cited by 28 publications

(12 citation statements)

References 13 publications

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“…Arc welding processes such as gas metal arc welding (GMAW) are also used for auto body structures that are plastically deformed or closed parts or where the part geometry inhibits the use of RSW . LW of DP steels have been extensively studied during the last decade . The main outcome of these studies was that fusion zone hardening and heat affected zone (HAZ) softening occurred during the LW of DP steels, which resulted in deterioration of the tensile and fatigue properties as well as the formability of the laser welded DP steel joints .…”

Section: Introductionmentioning

confidence: 99%

Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

Ashrafi

Shamanian

Emadi

et al. 2018

steel research int.

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In the present research, a comparative study on influence of friction stir welding (FSW) and gas tungsten arc welding (GTAW) processes on the microstructure and tensile properties of dual phase steel welds is carried out. The results indicate that the microstructure of weld metal and inner part of the heat affected zone (HAZ) in the GTA welded sample is composed of coarse bainite, Widmanestatten ferrite and ferrite–carbide (FC) aggregate. The sample welded by FSW exhibits the formation of fine ferrite, FC aggregate, and bainite in the weld nugget and inner part of the HAZ. Microhardness measurements reveal the formation of a softened zone in the subcritical area of the HAZ due to the tempering of the pre‐existing martensite. Both joints show lower tensile strength, tensile elongation and work hardening exponent compared to the base metal (BM), and fail in the softened HAZ during the uniaxial tensile test. However, the joint efficiency, work hardening rate and work hardening exponent of the sample welded by FSW are superior to those for the GTA welded sample. The predominant fracture mechanism for all samples is ductile with dimples on the fractured surfaces.

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Section: Introductionmentioning

confidence: 99%

Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

Ashrafi

Shamanian

Emadi

et al. 2018

steel research int.

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“…Pulsed Nd:YAG laser welding has especially attracted attention recently in many academic research and industry applications [13][14][15][16][17][18][19]. Tzeng [20] used zinc-coated steel and attempted to make a laser welding joint without gas-formed porosity.…”

Section: Introductionmentioning

confidence: 99%

Effects of Pulsed Nd:YAG Laser Welding Parameters on Penetration and Microstructure Characterization of a DP1000 Steel Butt Joint

Xue

Péreira

Amorim

et al. 2017

Metals

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Abstract:Of particular importance and interest are the effects of pulsed Nd:YAG laser beam welding parameters on penetration and microstructure characterization of DP1000 butt joint, which is widely used in the automotive industry nowadays. Some key experimental technologies including pre-welding sample preparation and optimization design of sample fixture for a sufficient shielding gas flow are performed to ensure consistent and stable testing. The weld quality can be influenced by several process factors, such as laser beam power, pulse duration, overlap, spot diameter, pulse type, and welding velocity. The results indicate that these key process parameters have a significant effect on the weld penetration. Meanwhile, the fusion zone of butt joints exhibits obviously greater hardness than the base metal and heat affected zone of butt joints. Additionally, the volume fraction of martensite of dual-phase steel plays a considerable effect on the hardness and the change of microstructure characterization of the weld joint.

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“…The demand of environment-friendly vehicles that have better fuel economy and lower CO 2 emissions compels automakers to apply advanced technology and new materials in vehicle manufacturing [1][2][3][4]. During manufacturing of automotive components, welding and joining are unavoidable.…”

Section: Introductionmentioning

confidence: 99%

Tensile and fatigue properties of fiber laser welded high strength low alloy and DP980 dual-phase steel joints

et al. 2013

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Mechanical and metallurgical properties of pulsed neodymium-doped yttrium aluminum garnet laser welding of dual phase steels

Cited by 28 publications

References 13 publications

Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

Effects of Pulsed Nd:YAG Laser Welding Parameters on Penetration and Microstructure Characterization of a DP1000 Steel Butt Joint

Tensile and fatigue properties of fiber laser welded high strength low alloy and DP980 dual-phase steel joints

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