Study on Microstructure of Ni-based Superalloy DZ408 Prepared by Laser Melting Deposition AITranslate
Abstract AITranslate
Plate sample of Ni-based superalloy DZ408, with compact structure and good orientation, was pro- duced by laser melting deposition with single- and multi-channel scanning. Orientation growth law and formatioh mechanism of as-deposited microstructure were analyzed. The results indicate that plate sample prepared by single-channel scanning is of regular shape and polished surface, and well-orientated dendrites form in solidification direction. However in scanning direction,the dendrites tilt towards the scanning direction due to the influence of the shape of molten pool. Z-type microstructure perpendicular to scanning direction is obtained in the plate sample prepared by multi-channel scanning. The thickness of laser single-chan- nel depositing layer parallel to the scanning direction in the sample border is twice as much as that in the sample insider for long ending time of laser single-channel scanning and short cooling time,and its bath line collapses duwn. The gravity of liquid metal is greater than its surface tension, thus the metal droplets are formed and finally,lots of metal tumors appear in the surface of the multi-channel scanned samples.
KeyWords AITranslate
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Basic Information:
DOI：
Chinese Library Classification Number:TG132.32[一般工业技术—材料科学与工程]
Citation Information:
Plate sample of Ni-based superalloy DZ408, with compact structure and good orientation, was pro- duced by laser melting deposition with single- and multi-channel scanning. Orientation growth law and formatioh mechanism of as-deposited microstructure were analyzed. The results indicate that plate sample prepared by single-channel scanning is of regular shape and polished surface, and well-orientated dendrites form in solidification direction. However in scanning direction,the dendrites tilt towards the scanning direction due to the influence of the shape of molten pool. Z-type microstructure perpendicular to scanning direction is obtained in the plate sample prepared by multi-channel scanning. The thickness of laser single-chan- nel depositing layer parallel to the scanning direction in the sample border is twice as much as that in the sample insider for long ending time of laser single-channel scanning and short cooling time,and its bath line collapses duwn. The gravity of liquid metal is greater than its surface tension, thus the metal droplets are formed and finally,lots of metal tumors appear in the surface of the multi-channel scanned samples.
quote
| GB/T 7714-2015 | [1] JIANG Hua, TANG Hai-bo, WANG Hua-ming. Study on Microstructure of Ni-based Superalloy DZ408 Prepared by Laser Melting Deposition[J]. Rare Metals and Cemented Carbides, 2014(1): 46-51. |
| MLA | [1] JIANG Hua, et al., "Study on Microstructure of Ni-based Superalloy DZ408 Prepared by Laser Melting Deposition." Rare Metals and Cemented Carbides, no. 1, 2014, pp. 46-51. |
| APA | [1] JIANG Hua, TANG Hai-bo, & WANG Hua-ming. (2014). Study on Microstructure of Ni-based Superalloy DZ408 Prepared by Laser Melting Deposition. Rare Metals and Cemented Carbides(1), 46-51. |
| IEEE | [1] JIANG Hua, TANG Hai-bo, and WANG Hua-ming, "Study on Microstructure of Ni-based Superalloy DZ408 Prepared by Laser Melting Deposition," Rare Metals and Cemented Carbides, no. 1, pp. 46-51, 2014. keywords: {Ni-based superalloy DZ408;laser melting deposition;crystal orientation growth law;mechanismof microstructure formation} |