The effect of Cu rejection in laser forming of AlCoCrCuFeNi/Mg composite coating

Guo, Meng; Lin, Xin; Xie, Honglan; Yue, Tai Man; Xu, Dapeng; Sun, Le; Qi, Ming

doi:10.1016/j.matdes.2016.06.094

Cited by 36 publications

(14 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The content of Cu and Si was determined to be 70% and 10%, respectively. This is consistent with previous data showing that Cu is easily segregated during solidification and a small additional Si content benefits the cladding quality of the coating [14,15].…”

Section: Introductionsupporting

confidence: 93%

Effects of Different Levels of Boron on Microstructure and Hardness of CoCrFeNiAlxCu0.7Si0.1By High-Entropy Alloy Coatings by Laser Cladding

Zhang

et al. 2017

Coatings

View full text Add to dashboard Cite

High-entropy alloys (HEAs) are novel solid solution strengthening metallic materials, some of which show attractive mechanical properties. This paper aims to reveal the effect of adding small atomic boron on the interstitial solid solution strengthening ability in the laser cladded CoCrFeNiAl x Cu 0.7 Si 0.1 B y (x = 0.3, x = 2.3, and 0.3 ≤ y ≤ 0.6) HEA coatings. The results show that laser rapid solidification effectively prevents brittle boride precipitation in the designed coatings. The main phase is a simple face-centered cubic (FCC) matrix when the Al content is equal to 0.3. On the other hand, the matrix transforms to single bcc solid solution when x increases to 2.3. Increasing boron content improves the microhardness of the coatings, but leads to a high degree of segregation of Cr and Fe in the interdendritic microstructure. Furthermore, it is worth noting that CoCrFeNiAl 0.3 Cu 0.7 Si 0.1 B 0.6 coatings with an FCC matrix and a modulated structure on the nanometer scale exhibit an ultrahigh hardness of 502 HV 0.5 .

show abstract

Section: Introductionsupporting

confidence: 93%

Effects of Different Levels of Boron on Microstructure and Hardness of CoCrFeNiAlxCu0.7Si0.1By High-Entropy Alloy Coatings by Laser Cladding

Zhang

et al. 2017

Coatings

View full text Add to dashboard Cite

show abstract

“…For instance, the AlCoCrCuFeNi HEA has been adopted for improving the surface properties of Mg and AZ91D substrates by means of a laser cladding technique [3][4][5][6][7]. Nevertheless, despite the improvement of the properties of the formed AlCoCrCuFeNi HEA coatings, the results also show that the interaction between the used HEA and the substrate may occur during processing.…”

Section: Introductionmentioning

confidence: 99%

Growth Morphology of CuMg2 in Laser Forming of AlCoCrCuFeNi Coating on Mg

Guo¹,

Liu²,

Qiu³

et al. 2018

Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)

View full text Add to dashboard Cite

Abstract-The AlCoCrCuFeNi high-entropy alloy coating was fabricated on pure magnesium by means of laser cladding using a direct blown powder method. The formed coating is composed of two different layers, i.e., a lower composite layer consisting of some partially melted HEA particles in a mixture of Mg and a top HEA coating. Also, some Cu was rejected into the substrate melt during the processing, resulting in the formation of CuMg 2 dendrites. Moreover, the dendritic structure of the CuMg 2 phase, which shows a faceted interface at low growth rates, is shown to undergo a transition from a faceted to non-faceted interface at relatively higher growth velocities. The change in solidification behavior of the formed CuMg 2 phase is likely to be due to the undercooling increase resulting from the solidification velocity increasing.

show abstract

“…HEAs have a simple solid-solution phase structure, such as face-centered cubic (FCC), body centered cubic (BCC), FCC+BCC, hexagonal close-packed (HCP) lattice, rather than complex intermetallic compounds 2,3 . At the same time, HEAs have many excellent properties [1][2][3][4][5][6] , such as high strength, high hardness, high thermal stability, good wear resistance, high corrosion resistance, etc. As a new frontier in the field of metal materials, HEAs may exceed the performance limits of convention alloys and have broad application prospects.…”

Section: Introductionmentioning

confidence: 99%

“…In 2004, AlxCoCrCuFeNi high entropy alloy was prepared and the concept of high entropy alloy was first proposed by Yeh 1 . Up to now, HEAs research has mainly focused on the aspects of composition design, mechanical properties, phase structure and so on [6][7][8][9][10][11][12][13][14] . The composition design for HEAs is primarily based on CoCrFeNi series to add some other alloy elements to synthesize more than five multiprincipal alloys [6][7][8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, HEAs research has mainly focused on the aspects of composition design, mechanical properties, phase structure and so on [6][7][8][9][10][11][12][13][14] . The composition design for HEAs is primarily based on CoCrFeNi series to add some other alloy elements to synthesize more than five multiprincipal alloys [6][7][8][9][10][11] . The mechanical properties of HEAs are mainly concentrated on the study of high hardness, high strength, compression and tensile properties and so forth [8][9][10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of CeO2 Doping on Phase Structure and Microstructure of AlCoCuFeMnNi Alloy Coating

Ma¹,

Wang²,

Zhou³

et al. 2018

Mat. Res.

View full text Add to dashboard Cite

The effect of Cu rejection in laser forming of AlCoCrCuFeNi/Mg composite coating

Cited by 36 publications

References 39 publications

Effects of Different Levels of Boron on Microstructure and Hardness of CoCrFeNiAlxCu0.7Si0.1By High-Entropy Alloy Coatings by Laser Cladding

Effects of Different Levels of Boron on Microstructure and Hardness of CoCrFeNiAlxCu0.7Si0.1By High-Entropy Alloy Coatings by Laser Cladding

Growth Morphology of CuMg2 in Laser Forming of AlCoCrCuFeNi Coating on Mg

Effect of CeO2 Doping on Phase Structure and Microstructure of AlCoCuFeMnNi Alloy Coating

Contact Info

Product

Resources

About