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  Correlation of microstructure, chip-forming properties, and dynamic torsional properties in free-machining steels

Kim, Y.-J., Kim, H., Kang, M., Rhee, K., Shin, S. Y., & Lee, S. (2013). Correlation of microstructure, chip-forming properties, and dynamic torsional properties in free-machining steels. Metallurgical and Materials Transactions A, 44(10), 4613-4625. doi:10.1007/s11661-013-1828-2.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-D527-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-8825-B
Genre: Journal Article

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 Creators:
Kim, Yong-Jin1, 2, Author              
Kim, Hyunmin1, Author              
Kang, Minju1, Author              
Rhee, Kiho3, Author              
Shin, Sang Yong4, Author              
Lee, Sunghak5, 6, Author              
Affiliations:
1Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang 790-784, South Korea, ou_persistent22              
2Plate Research Group, Technical Research Laboratories, POSCO, Pohang 790-300, South Korea, ou_persistent22              
3Product Solution Research Group, Songdo Product Application Center, POSCO, Incheon 406-840, South Korea, ou_persistent22              
4Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
5Center for Advanced Aerospace MaterialsPohang, University of Science and Technology, Pohang, South Korea, ou_persistent22              
6Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, South Korea, ou_persistent22              

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Free keywords: Chip thickness; Dynamic torsional test; Machining Process; Machining test; Maximum shear stress; Maximum shears; Soft metals; Torsional properties, Microstructure, Lead
 Abstract: Four free-machining steels were fabricated by varying volume fractions of MnS and soft metal additives of Pb and Bi, and their microstructures, tensile properties, chip-forming properties, and dynamic torsional properties were analyzed. Machining and dynamic torsional tests were conducted on the four steels to investigate chip-forming and dynamic torsional properties, respectively. In the Pb-S- and Bi-S-based steels, the chip thickness and ridge area of the 1st chip obtained from the machining test were smaller than in the S-based steels and were not changed much after repeated machining processes. These chip-forming properties were closely related with dynamic torsional properties. Dynamic maximum shear strains of the Pb-S- and Bi-S-based steels were higher than those of the S-based steels, while dynamic maximum shear stresses were lower, thereby leading to the relatively homogeneous dynamic shear deformation and to the better chip-forming properties and machinability. © 2013 The Minerals, Metals amp; Materials Society and ASM International.

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Language(s): eng - English
 Dates: 2013-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1007/s11661-013-1828-2
BibTex Citekey: Kim20134613
 Degree: -

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Title: Metallurgical and Materials Transactions A
  Other : Metallurgical and Materials Transactions A, Physical Metallurgy and Materials Science
  Abbreviation : Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
Source Genre: Journal
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Publ. Info: New York, NY : Springer Sciences & Business Media
Pages: - Volume / Issue: 44 (10) Sequence Number: - Start / End Page: 4613 - 4625 Identifier: ISSN: 1073-5623
CoNE: /journals/resource/954928569608