Correlation of Microstructure, Chip-Forming Properties, and Dynamic Torsional Properties in Free-Machining Steels
SCIE
SCOPUS
- Title
- Correlation of Microstructure, Chip-Forming Properties, and Dynamic Torsional Properties in Free-Machining Steels
- Authors
- Yongjin Kim; Hyunmin Kim; Minju Kang; Kiho Rhee; Sang Yong Shin; Lee, S
- Date Issued
- 2013-10
- Publisher
- SPRINGER
- 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 1(st) 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. (C) The Minerals, Metals & Materials Society and ASM International 2013
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/11379
- DOI
- 10.1007/S11661-013-1828-2
- ISSN
- 1073-5623
- Article Type
- Article
- Citation
- Metallurgical and Materials Transactions A, vol. 44, no. 10, page. 4613 - 4625, 2013-10
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