Devitrification behaviour of rapidly solidified Al87Ni7Cu3Nd3 amorphous alloy prepared by melt spinning method

Yu-de, Xiao; Li, Min; Zhong, Jue; Li, Wenxian; Ma, Zhengqing

doi:10.1007/s11771-007-0056-6

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…At present, Al–Si alloy is widely used in electronic packaging, aerospace, and other fields, as per Li et al [ 2 ] and Jia et al [ 3 ]. In particular, alloys reinforced with dispersion precipitation, grain reinforced alloys, or whisker reinforced alloys were found to be more attractive [ 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Densification of SiCp/Al–Fe–V–Si Composites by the Wedge Rolling Method

Huan

et al. 2023

Materials

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The densification of a SiCp/Al–Fe–V–Si billet was achieved by reducing the pores and oxide film between the particles by rolling. The wedge pressing method was used to improve the formability of the composite after jet deposition. The key parameters, mechanisms, and laws of wedge compaction were studied. The results showed that the pass rate was reduced by 10 to 15 percent when using steel molds during the wedge pressing process if the distance between the two ends of the billet was about 10 mm, which was beneficial to improve the compactness and formability of the billet. The density and stress of the surface of the material were higher than those of the interior, where the distribution of density and stress tended to be uniform as the overall volume of the material shrank. During the wedge extrusion process, the material in the preforming area was thinned along the thickness direction, while the material in the main deformation area was lengthened along the length direction. Under plane strain conditions, the wedge formation of spray-deposited composites follows the plastic deformation mechanism of porous metals. The true relative density of the sheet was higher than the calculated value during the initial stamping phase, but was lower than the calculated value when the true strain exceeded 0.55. This was due to the accumulation and fragmentation of SiC particles, which made the pores difficult to remove.

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Section: Introductionmentioning

confidence: 99%

Densification of SiCp/Al–Fe–V–Si Composites by the Wedge Rolling Method

Huan

et al. 2023

Materials

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Spray deposition for making large size billet with swing atomizer

Liu

Tang

et al. 2008

J. Cent. South Univ. Technol.

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The movement mode of the atomizer is a very important parameter during spray deposition process, which has direct influence on the size and surface texture of the billets. To resolve the problem of manufacturing large size billets, a method of spray deposition by the atomizer with off-center swing was put forward. The atomizer was driven by the alternating current servomotor to swing within 7Û at varying speed. The influence of the atomizer parameters, such as translation of the atomizer, swing angle of the atomizer, substrate falling speed and spraying pressure, on the spray deposition was studied. The optimized parameters of the spray deposition process were obtained. The results show that the large size billets with uniform surface quality can be made through adjusting swing frequency and angle of the atomizer, offset distance of the atomizer and inclined angle of the substrate; the valid spray area will decrease and the dimension of top surface will reduce when pressure is less than 0.4 MPa within certain spray distance; meantime, the moving time and cooling time of the droplets are extended, which will lead to loose structure and bad densification. When the pressure, the swing angle and the eccentric offset of the atomization equal 0.5 MPa, 7Û and 60 mm, respectively, large size billets with fine texture and diameter of 500 mm can be produced.

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