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  Alligatoring phenomenon occurring during hot rolling of free-machining steel wire rods

Kim, H., Kang, M., Shin, S. Y., & Lee, S. (2013). Alligatoring phenomenon occurring during hot rolling of free-machining steel wire rods. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 568, 8-19. doi:10.1016/j.msea.2013.01.018.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E3E2-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-E3E3-E
Genre: Journal Article

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 Creators:
Kim, Hyunmin1, Author              
Kang, Minju1, Author              
Shin, Sang Yong2, Author              
Lee, Sunghak3, Author              
Affiliations:
1Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang 790-784, South Korea, persistent22              
2Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
3Center for Advanced Aerospace MaterialsPohang, University of Science and Technology, Pohang, South Korea, persistent22              

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Free keywords: Alligatoring; Carbon content; Cooling conditions; Crack initiation and propagation; High carbon content; In-situ observations; MnS inclusions; R-curve behavior, Carbon; Cooling; Cracks; Ferrite; Hot rolling; Pearlite, Wire
 Abstract: An investigation was conducted into effects of MnS inclusions on the alligatoring phenomenon which often occurred in hot-rolled free-machining steel wire rods fabricated by varying carbon content and cooling condition. In the wire rod containing high carbon content, MnS inclusions were continuously formed inside thin ferrite bands, and caused the cracking and the subsequent alligatoring. The wire rod containing low carbon content was often subjected to the alligatoring when a considerable amount of pearlite was formed by the slow cooling and thus ferrite bands were thinly formed between populated pearlite bands. On the other hand, the wire rods having thick ferrite bands were not cracked as MnS inclusions were homogeneously and discontinuously distributed inside thickened ferrite bands, even though a considerable amount of MnS inclusions were formed. These results were confirmed by the in situ observation of crack initiation and propagation occurring near a sharp notch tip and the R-curve behavior. In order to prevent the alligatoring, thus, it was recommended that the carbon content should be maintained below 0.1 at least, and that the fast cooling rate should be achieved above a certain cooling rate level to form MnS inclusions discontinuously inside thick ferrite bands. © 2013 Elsevier B.V.

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Language(s): eng - English
 Dates: 2013-04-13
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.msea.2013.01.018
BibTex Citekey: Kim20138
 Degree: -

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Title: Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing
  Abbreviation : Mater. Sci. Eng. A: Struct. Mater. Prop. Microstruct. Process.
Source Genre: Journal
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Publ. Info: New York, NY : Elsevier
Pages: - Volume / Issue: 568 Sequence Number: - Start / End Page: 8 - 19 Identifier: ISSN: 0921-5093
CoNE: https://pure.mpg.de/cone/journals/resource/954928498465_1