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

Hyun Kwang Seok, Hui Choon Lee, Kyu Hwan Oh, Jae-chul Lee, Ho In Lee, Hyung Yong Ra

Research output: Contribution to journalArticle

14 Citations (Scopus)

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. The optimum spray-forming condition to minimize transient-state rod growth was also presented. Experimental verification was made to confirm the proposed forming models.

Original languageEnglish
Pages (from-to)1479-1488
Number of pages10
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume31
Issue number5
Publication statusPublished - 2000 May 1
Externally publishedYes

Fingerprint

Time division multiplexing
Substrates

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

Formulation of rod-forming models and their application in spray forming. / Seok, Hyun Kwang; Lee, Hui Choon; Oh, Kyu Hwan; Lee, Jae-chul; Lee, Ho In; Ra, Hyung Yong.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 31, No. 5, 01.05.2000, p. 1479-1488.

Research output: Contribution to journalArticle

Seok, Hyun Kwang ; Lee, Hui Choon ; Oh, Kyu Hwan ; Lee, Jae-chul ; Lee, Ho In ; Ra, Hyung Yong. / Formulation of rod-forming models and their application in spray forming. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2000 ; Vol. 31, No. 5. pp. 1479-1488.
@article{fc3bead09de44623b1f453e726ef744a,
title = "Formulation of rod-forming models and their application in spray forming",
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. The optimum spray-forming condition to minimize transient-state rod growth was also presented. Experimental verification was made to confirm the proposed forming models.",
author = "Seok, {Hyun Kwang} and Lee, {Hui Choon} and Oh, {Kyu Hwan} and Jae-chul Lee and Lee, {Ho In} and Ra, {Hyung Yong}",
year = "2000",
month = "5",
day = "1",
language = "English",
volume = "31",
pages = "1479--1488",
journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",
issn = "1073-5623",
publisher = "Springer Boston",
number = "5",

}

TY - JOUR

T1 - Formulation of rod-forming models and their application in spray forming

AU - Seok, Hyun Kwang

AU - Lee, Hui Choon

AU - Oh, Kyu Hwan

AU - Lee, Jae-chul

AU - Lee, Ho In

AU - Ra, Hyung Yong

PY - 2000/5/1

Y1 - 2000/5/1

N2 - 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. The optimum spray-forming condition to minimize transient-state rod growth was also presented. Experimental verification was made to confirm the proposed forming models.

AB - 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. The optimum spray-forming condition to minimize transient-state rod growth was also presented. Experimental verification was made to confirm the proposed forming models.

UR - http://www.scopus.com/inward/record.url?scp=0034187790&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034187790&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0034187790

VL - 31

SP - 1479

EP - 1488

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

SN - 1073-5623

IS - 5

ER -