Crack-free Fe-based amorphous coating synthesized by laser cladding

Lu, Yunzhuo; Huang, Guangwei; Wang, Yongzhe; Li, Hongge; Qin, Zuoxiang; Lü, Xing

doi:10.1016/j.matlet.2017.08.125

Cited by 113 publications

(36 citation statements)

References 24 publications

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“…Preparing amorphous coatings with laser cladding can solve the problems of low bonding strength and high porosity. However, since laser cladding completely melts amorphous powders and then cools and solidifies them to form coatings, the amorphous content of the coatings is low, and thermal stress and residual stress present inside the coatings easily generate cracks during rapid cooling [24,25]. This affects the development and application of amorphous coatings.…”

Section: Introductionmentioning

confidence: 99%

Corrosion and Wear Resistance of Fe-Based Amorphous Coatings

Gan

Liu

et al. 2020

Coatings

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Fe-based amorphous coatings were prepared on the surface of 45 steel substrates via supersonic plasma spraying and laser cladding. The corrosion and wear behavior of the two different coatings were investigated. Compared with supersonic plasma spraying, laser cladding resulted in coatings with a relatively denser structure, lower porosity, less cracks, and a good metallurgical bond with the substrate. Thanks to these properties, coatings produced by laser cladding exhibit a higher ability to resist uniform corrosion and better friction and wear performance than plasma-sprayed coatings.

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Section: Introductionmentioning

confidence: 99%

Corrosion and Wear Resistance of Fe-Based Amorphous Coatings

Gan

Liu

et al. 2020

Coatings

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“…Because this technology can make the surface have excellent wear resistance, corrosion resistance and oxidation resistance, the surface modification of laser cladding has been developed rapidly, manifested in the use of various alloy powders for surface modification [3,4]. For example, cobalt-based, nickel-based and iron-based powders have been widely used in the research and commercial use of surface modification of 316 stainless steel [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of process parameters and niobium carbide addition on microstructure and wear resistance of laser cladding nickel‐based alloy coatings

Yufan

Ping

et al. 2020

Materialwissenschaft Werkst

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Based on the background of the engineering application of automobile mold repair and surface strengthening, the effects of process parameters on the formation and microstructure of laser cladding nickel(Ni)‐based alloy coating were studied. The optimal parameters were: laser power 2000 W, powder feeding rate 15 g/min, scanning speed 4 mm/s. Under this process, the cladding layer and the substrate can exhibit good metallurgical bonding, and the cladding layer has fine crystal grains and a low dilution ratio. On this basis, different mass fractions of niobium carbide (NbC) powder were added to the nickel‐based powder and laser cladding was carried out on the surface of die steel. The phase composition, microstructure, hardness and wear resistance of the coating were studied. The results show that with the increasing of niobium carbide addition, the hardness of the cladding layer decreases, and the wear loss of the cladding layer decreases first and then increases. When the niobium carbide addition reaches 6 wt.%, the wear loss of the cladding layer is the least, and the wear resistance is the best.

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“…The rapid heating and cooling during laser 3D printing inevitably induces a large temperature gradient, inducing high thermal stress which creates defects in the 3D printed samples [13]. To alleviate the cracking problem, Lu et al employed a triple laser scanning strategy in the laser cladding Fe-based BMG process [16]. The results showed that the crystallinity of triple laser scanned samples was higher than that of the single laser scanned samples; however, crack-free samples were obtained.…”

Section: Introductionmentioning

confidence: 99%

Brittle-Ductile Transition in Laser 3D Printing of Fe-Based Bulk Metallic Glass Composites

Xie

Chen

Gao

2019

Metals

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The effects of the α-Fe phase on mechanical properties and cracking of laser 3D printing Fe-based bulk metallic glass composites were investigated. The elastic recovery and plasticity index were characterized by nanoindentation. As the volume fraction of the α-Fe phase increases from 23.66% to 52.38%, the elastic modulus of printed samples suddenly drops. The samples exhibit a lower deformation resistance, and the plasticity index increases gradually. When the volume fraction of the α-Fe phase is 67.84%, the interaction between the α-Fe phase and matrix phase is smaller during expansion shrinkage. As a result, cracking is easy to initiate, which leads to the highest crack rate of the printed sample. However, as the volume fraction of the α-Fe phase increases to 83.31%, the hard brittle phase was sandwiched between the α-Fe phases similar to the finger structure plays key role in the plastic deformation. The plastic deformation releases large amounts of stress concentrated at the boundary and suppresses crack formation.

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Crack-free Fe-based amorphous coating synthesized by laser cladding

Cited by 113 publications

References 24 publications

Corrosion and Wear Resistance of Fe-Based Amorphous Coatings

Corrosion and Wear Resistance of Fe-Based Amorphous Coatings

Effect of process parameters and niobium carbide addition on microstructure and wear resistance of laser cladding nickel‐based alloy coatings

Brittle-Ductile Transition in Laser 3D Printing of Fe-Based Bulk Metallic Glass Composites

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