Experimental Study on Electromagnetic Stirring Assisted Laser Metal Deposition Titanium Alloy

Lanyun, 钦兰云 Qin; Guang, 杨光 Yang; Hongyou, 卞宏友 Bian; Wei, 王伟 Wang; Yuhang, 任宇航 Ren

doi:10.3788/cjl201441.0303004

Cited by 4 publications

(3 citation statements)

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“…With the development of magnetic control technology in the field of material preparation, many studies had shown that [2][3][4][5] electromagnetic stirring could fine the grains, improve segregation of microstructure and reduce or eliminate the pores and cracks in the coatings. Liu et al [3] fabricated the Fe60-base composite coatings by rotating magnetic field auxiliary laser cladding on Q235 steel surface.…”

Section: Introductionmentioning

confidence: 99%

Influence on the Microstructure of Laser Cladding NiCrBSi Coatings with Electromagnetic Compound Field

Zhai

Zhang

Ban

2019

SSP

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A NiCrBSi coating was produced on a pure iron plate by laser cladding technology. Electric-magnetic compound field was applied in order to improve the quality of coating. The effect of electric-magnetic compound field on the microstructure and the phase composition of coating was investigated by OM and XRD, respectively. The results indicated that the phase composition of the coatings were γ-(Fe,Ni), Cr23C6, Cr7C3, CrB and Ni3B with and without electromagnetic field. Microstructural observation showed that the grains were refined obviously by electromagnetic stirring. The electromagnetic stirring could change the direction of the heat dissipation and changed the direction of the columnar crystal at the bottom of the coating. High qualitative coating without porosity were obtained under electromagnetic field.

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Section: Introductionmentioning

confidence: 99%

Influence on the Microstructure of Laser Cladding NiCrBSi Coatings with Electromagnetic Compound Field

Zhai

Zhang

Ban

2019

SSP

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“…6 Lanyun et al 4 found that grain refinement by melting pool convection and vibration which are induced by ultrasonic vibration is the main reason for material's uniform and residual stress decrease. Qin et al 5 pointed out that melting pool convection enhanced by electromagnetic stirring is beneficial for cooling down of the melting pool, which contributes to the grain refinement and the increase in microhardness. Wang et al 6 concluded that laserinduction hybrid cladding not only decreases residual stress effectively but can also avoid cracks in the large area.…”

Section: Introductionmentioning

confidence: 99%

“…There are several stress control methods according to recent research such as ultrasonic assisted laser metal deposition, 4 electromagnetic stirring assisted laser metal deposition, 5 and laser-induction hybrid cladding. 6 Lanyun et al 4 found that grain refinement by melting pool convection and vibration which are induced by ultrasonic vibration is the main reason for material's uniform and residual stress decrease.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasonic impact peening on TI-6AL-4V laser deposition shaping

Sun

Zhang

et al. 2017

Journal of Laser Applications

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Ti-6Al-4V is widely used in the aerospace industry, and the laser deposition shaping of Ti-6Al-4V is considered as an efficient method for manufacturing complex structural components. However, the components manufactured by laser deposition shaping face problems of distortion and cracking. In order to avoid these problems, ultrasonic impact peening was introduced into the Ti-6Al-4V laser deposition shaping process in this study. The effect of ultrasonic impact peening on microstructural modification, residual stress, specimen distortion, and microhardness of the laser deposition shaping specimen was studied. Experiments of laser deposition shaping were carried out with a 6 kW carbon dioxide laser and a coaxial powder feeder. The ultrasonic impact peening was processed after one bead of the Ti-6Al-4V laser deposition clad was accomplished. After mechanical polish, the microstructure of the ultrasonic impact peened specimen was observed using a scanning electron microscope. There was a grain refinement layer in the surface region of the clad with a depth of approximately 200 um. The residual stress of the specimen was measured by X-ray diffraction. The result of the residual stress measurement showed that the compressive residual stress of the specimen is introduced by the ultrasonic impact peening. The distortion of the specimen is measured using a three-coordinate measuring machine. Besides, inhibition of crack generation was achieved in the specimen processed by the ultrasonic impact peening. In conclusion, the ultrasonic impact peening is beneficial for the process of Ti-6Al-4V laser deposition shaping.

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Microstructure, microhardness and corrosion resistance of NiCrBSi coatings under electromagnetic field auxiliary laser cladding

Zhai

Ban

Zhang

2019

Surface and Coatings Technology

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Experimental Study on Electromagnetic Stirring Assisted Laser Metal Deposition Titanium Alloy

Cited by 4 publications

References 0 publications

Influence on the Microstructure of Laser Cladding NiCrBSi Coatings with Electromagnetic Compound Field

Influence on the Microstructure of Laser Cladding NiCrBSi Coatings with Electromagnetic Compound Field

Effect of ultrasonic impact peening on TI-6AL-4V laser deposition shaping

Microstructure, microhardness and corrosion resistance of NiCrBSi coatings under electromagnetic field auxiliary laser cladding

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