Effects of interfaces on heat transfer in laser welding of electrical steel laminations

Wang, Hongze; Zhang, Yansong; Lai, Xinmin

doi:10.1016/j.ijheatmasstransfer.2015.07.027

Cited by 14 publications

(6 citation statements)

References 29 publications

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“…Figure 3 shows the SEM morphologies of joints ACS-2 and ACS-5. The interfaces in multilayer structures could affect heat transfer [29]. Consequently, magnified morphologies of the microstructures at upper and lower interfaces in two joints were performed for comparative analyses.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and mechanical properties of nanosecond pulsed laser welded Al–Cu–steel laminated structures

Niu

Zhu

et al. 2022

Science and Technology of Welding and Joining

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Al-Cu-steel laminated structures with configurations of Al/Cu/steel and steel/Cu/Al were obtained via nanosecond pulsed laser welding. Cavities occurred at the bottom welds in two joints. Full-penetration welds occurred more easily in steel/Cu/Al joints compared to Al/Cu/steel joints. The metallurgical reaction of Al and Fe was impeded by Cu. The eutectic (α-Al+θ ) and θ -CuAl 2 phases were predominant at the Al/Cu interface in the steel/Cu/Al joints, while (Cu, Fe) was the main phase in Al/Cu/steel joint. The average lap shear force of the Al/Cu/steel joints (51.2 N) was superior to that of steel/Cu/Al joints (37.2 N). The fracture for both joins occurred at the Al/Cu interface. The fracture morphologies indicated that smaller connection width and Al/Cu IMCs caused the weld pullout failure (WPF) mode in steel/Cu/Al joints. The larger connection area and presence of (Cu, Fe) solid solution were responsible for the interfacial shear failure (ISF) mode in Al/Cu/steel joints.

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Section: Resultsmentioning

confidence: 99%

Microstructure and mechanical properties of nanosecond pulsed laser welded Al–Cu–steel laminated structures

Niu

Zhu

et al. 2022

Science and Technology of Welding and Joining

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“…Generally, the composition of the glue varies with the supplier, including the organic glue, inorganic glue and their combinations. However, the biggest obstacle for the large-scale application of this technique was the concern about the mechanical failure of the adhesion under the periodic load condition at an elevated temperature during the operation of the motor [ 47 ]. Besides, the cost was also higher than the other joining methods [ 46 ].…”

Section: The Representative Joining Methodsmentioning

confidence: 99%

“…The simulation will act as a useful tool to reveal the mechanism underlying the process of joining the laminated electrical steels. Though this method has been widely used in the field of joining and welding of various materials [ 58 , 59 ], the research about the simulation of joining the laminated electrical steels is still at the initial stage [ 47 ]. One of the difficulties in the simulation of welding the laminated electrical steels is how to describe the effect of the interfaces on the heat transfer during the welding process.…”

Section: Simulation Of the Joining Processmentioning

confidence: 99%

“…One of the difficulties in the simulation of welding the laminated electrical steels is how to describe the effect of the interfaces on the heat transfer during the welding process. Wang et al [ 47 ] developed a thermal analysis finite element model in ANSYS to calculate the temperature distribution and analyze the evolution of the interfaces during laser welding of the laminated electrical steel laminations, as shown in Figure 6 . In the model, the technique of “birth” and “death” element was used to describe the effects of the interfaces on the heat transfer, where two groups of values for the thermal contact conductance were used respectively to describe the heat transfer ability of the interface before and after melting.…”

Section: Simulation Of the Joining Processmentioning

confidence: 99%

“… ( a ) Schematic of the heat transfer process at the longitudinal section of the weld seam during the welding process; ( b ) simulated non-uniform temperature distribution at the longitudinal section of the weld seam because of the hindrance of the interface on heat transfer; ( c ) simulated uniform temperature distribution at the longitudinal section of the weld seam when the interface was melted due to absorbing the energy of laser [ 47 ]. …”

Section: Figurementioning

confidence: 99%

See 2 more Smart Citations

Joining of the Laminated Electrical Steels in Motor Manufacturing: A Review

Xia

Wang

et al. 2020

Materials

Self Cite

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In recent years, the motor has been increasingly used to replace the conventional gasoline engine for carbon emission reduction, and the high-performance motor is urgently required. The stator and rotor in a motor are made of hundreds of joined and laminated electrical steels. This paper covers the current research in joining the laminated electrical steels for the motor application, together with the critical assessment of our understanding. It includes the representative joining method, modeling of the joining process, microstructure of the weld zone, mechanical strength and magnetic properties. The gaps in the scientific understanding, and the research needs for the expansion of joining laminated electrical steels, are provided.

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Comparison between exact thermal boundary condition and harmonic mean conductivity condition at the solid–fluid interface for finite thickness shrouded non-isothermal fin array

Pathak

Giri

2017

Applied Mathematical Modelling

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Effects of interfaces on heat transfer in laser welding of electrical steel laminations

Cited by 14 publications

References 29 publications

Microstructure and mechanical properties of nanosecond pulsed laser welded Al–Cu–steel laminated structures

Microstructure and mechanical properties of nanosecond pulsed laser welded Al–Cu–steel laminated structures

Joining of the Laminated Electrical Steels in Motor Manufacturing: A Review

Comparison between exact thermal boundary condition and harmonic mean conductivity condition at the solid–fluid interface for finite thickness shrouded non-isothermal fin array

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