Formulation of rod-forming models and their application in spray forming

Title
Formulation of rod-forming models and their application in spray forming
Authors
석현광이희춘오규환이재철이호인나형용
Keywords
rod-forming model; spray forming; transient growth; steady growth; time-dependent model; time-independent model
Issue Date
2000-05
Publisher
Metallurgical and materials transactions. A, Physical metallurgy and materials science
Citation
VOL 31, NO 5, 1479-1488
Abstract
In rod spray forming, the preform changes its shape continually from that of a disc to a rod (transient-state rod growth) and then maintains its top surface profile once it has settled down (steady-state rod growth). The rod growth mechanism during spray forming was analyzed using rod-forming models. At a sufficiently high substrate rotation velocity, the calculated results based on the three-dimensional time-dependent model (3-D TDM) and the two-dimensional time-dependent model (2-D TDM) were observed to be identical. The calculated results of the rod’s top shape, obtained by the TDMs, were almost identical to those obtained by the two-dimensional time-independent model (2-D TIM), which means that there exists steady-state rod growth. The effects of spray-forming parameters, such as initial eccentric distance, substrate withdrawal velocity, and spray angle, on the shape-evolution behavior were analyzed in terms of the vertex growth velocity ( G v o ¯ ¯ ¯ ¯ ). The optimum spray-forming condition to minimize transient-state rod growth was also presented. Experimental verification was made to confirm the proposed forming models.
URI
http://pubs.kist.re.kr/handle/201004/13349
ISSN
1073-5623
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE