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Structure of the continuously cast Ni-based superalloy GMR 235
Zupanič, Franc (Author), Bončina, Tonica (Author), Lojen, Gorazd (Author), Markoli, Boštjan (Author), Spaić, Savo (Author)

URLURL - Presentation file, Visit http://dx.doi.org/10.1016/j.jmatprotec.2006.12.035 This link opens in a new window

Abstract
In this work we characterized the structure of continuously cast small cross-section rods (O10 mm) of the Ni-based superalloy GMR 235. In the microstructure prevailed dendritic columnar ?-grains with ?'-precipitates. In the interdendritic regions MC-carbide and M3B2-boride were identified. The inverse macrosegregation was very faint, except at the secondary witness marks and natural corrugations. It was found that the alternating drawing mode had much greater influence on microstructure than other casting parameters. Special attention was given to explanation of processes leading to formation of surface marks (primary and secondary witness marks and natural corrugations). Formation of hot tears and appearance of inverse segregation is also discussed.

Language:English
Keywords:Ni-based superalloy, solidification, microstructure, continuous casting, surface marks
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:NTF - Faculty of Natural Sciences and Engineering
Year:2007
Number of pages:str. 200-206
Numbering:Vol. 186, iss. 1/3
UDC:669
ISSN on article:0924-0136
COBISS.SI-ID:687711 Link is opened in a new window
Views:728
Downloads:309
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Record is a part of a journal

Title:Journal of materials processing technology
Shortened title:J. mater. process. technol.
Publisher:Elsevier
ISSN:0924-0136
COBISS.SI-ID:30105600 This link opens in a new window

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