Microstructural evolution and deformation behavior of twinning-induced plasticity (TWIP) steel during wire drawing
SCIE
SCOPUS
- Title
- Microstructural evolution and deformation behavior of twinning-induced plasticity (TWIP) steel during wire drawing
- Authors
- Hwang, JK; Yi, IC; Son, IH; Yoo, JY; Kim, B; Zargaran, A; Kim, NJ
- Date Issued
- 2015-09-17
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- The effect of wire drawing on the microstructural evolution and deformation behavior of Fe-Mn-Al-C twinning-induced plasticity (TWIP) steel has been investigated. The inhomogeneities of the stress state, texture, microstructure, and mechanical properties were clarified over the cross section of drawn wire with the aid of numerical simulation, Schmid factor analysis, and electron backscatter diffraction (EBSD) techniques. The analysis of texture in drawn wire shows that a mixture of < 111 > and < 100 > fiber texture was developed with strain; however, the distribution of < 111 > and < 100 > fibers was inhomogeneous along the radial direction of wire due to uneven strain distribution and different stress state along the radial direction. It has also been shown that the morphology, volume fraction, and variant system of twins as well as twinning rate were dependent on the imposed stress state. The surface area was subjected to larger strain and more complex stress state involving compression, shear, and tension than the center area, resulting in a larger twin volume fraction and more twin variants in the former than in the latter at all the strain levels. While the surface area was saturated with twins at an early stage of drawing, the center area was not saturated with twins even at fracture, implying that the fracture of wire were initiated at the surface area because of the exhaustion of ductility due to twinning. Based on these results, it is suggested that imposing a uniform strain distribution along the radial direction of wire by the control of processing conditions such as die angle and amount of reduction per pass is necessary to increase the drawing limit of TWIP steel. (C) 2015 Elsevier B.V. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/35460
- DOI
- 10.1016/J.MSEA.2015.07.034
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 644, page. 41 - 52, 2015-09-17
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.