NDLI: Strain Hardening Associated with Dislocation, Deformation Twinning, and Dynamic Strain Aging in Fe–20Mn–1.3C

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Acta Metallurgica Sinica (English Letters) : Volume 27, Issue 3, June 2014

Acta Metallurgica Sinica (English Letters) : Volume 27, Issue 2, April 2014

Acta Metallurgica Sinica (English Letters) : Volume 27, Issue 1, February 2014

Acta Metallurgica Sinica (English Letters) : Volume 26

Strain Hardening Associated with Dislocation, Deformation Twinning, and Dynamic Strain Aging in Fe–20Mn–1.3C–(3Cu) TWIP Steels

Content Provider	Springer Nature Link
Author	Liu, Longlong Wang, Mingjie Zhao, Lingyan Zhu, Dingyi Hu, Zhenming
Copyright Year	2014
Abstract	The effects of Cu on stacking fault energy, dislocation slip, mechanical twinning, and strain hardening in Fe–20Mn–1.3C twinning-induced plasticity (TWIP) steels were systematically investigated. The stacking fault energy was raised with an average slope of 2 mJ/m$^{2}$ per 1 wt% Cu. The Fe–20Mn–1.3C–3Cu steel exhibited superior tensile properties, with the ultimate tensile strength reached at 2.27 GPa and elongation up to 96.9% owing to the high strain hardening that occurred. To examine the mechanism of this high strain hardening, dislocation density determination by XRD was calculated. The dislocation density increased with the increasing strain, and the addition of Cu resulted in a decrease in the dislocation density. A comparison of the strain-hardening behavior of Fe–20Mn–1.3C and Fe–20Mn–1.3C–3Cu TWIP steels was made in terms of modified Crussard–Jaoul (C–J) analysis and microstructural observations. Especially at low strains, the contributions of all the relevant deformation mechanisms—slip, twinning, and dynamic strain aging—were quantitatively evaluated. The analysis revealed that the dislocation storage was the leading factor to the increase of the strain hardening, while dynamic strain aging was a minor contributor to strain hardening. Twinning, which interacted with the matrix, acted as an effective barrier to dislocation motion.
Starting Page	601
Ending Page	608
Page Count	8
File Format	PDF
ISSN	10067191
Journal	Acta Metallurgica Sinica (English Letters)
Volume Number	27
Issue Number	4
e-ISSN	21941289
Language	English
Publisher	The Chinese Society for Metals
Publisher Date	2014-07-23
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dislocation density Spectroscopy/Spectrometry Mechanical twinning Twinning-induced plasticity (TWIP) Tribology, Corrosion and Coatings Organometallic Chemistry Characterization and Evaluation of Materials Metallic Materials Strain hardening Nanotechnology Dynamic strain aging
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Metals and Alloys

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