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Large strain mechanical behavior of 1018 cold-rolled steel over a wide range of strain rates

Vural, M. and Rittel, D. and Ravichandran, G. (2003) Large strain mechanical behavior of 1018 cold-rolled steel over a wide range of strain rates. Metallurgical and Material Transactions A, 34 (12). pp. 2873-2885. ISSN 1073-5623. doi:10.1007/s11661-003-0188-8.

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The large-strain constitutive behavior of cold-rolled 1018 steel has been characterized at strain rates ranging from ε = 10^(−3) to 5 × 10^4 s^(−1) using a newly developed shear compression specimen (SCS). The SCS technique allows for a seamless characterization of the constitutive behavior of materials over a large range of strain rates. The comparison of results with those obtained by cylindrical specimens shows an excellent correlation up to strain rates of 10^4 s^(−1). The study also shows a marked strain rate sensitivity of the steel at rates exceeding 100 s^(−1). With increasing strain rate, the apparent average strain hardening of the material decreases and becomes negative at rates exceeding 5000 s^(−1). This observation corroborates recent results obtained in torsion tests, while the strain softening was not clearly observed during dynamic compression of cylindrical specimens. A possible evolution scheme for shear localization is discussed, based on the detailed characterization of deformed microstructures. The Johnson-Cook constitutive model has been modified to represent the experimental data over a wide range of strain rates as well as to include heat-transfer effects, and model parameters have been determined for 1018 cold-rolled steel.

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Ravichandran, G.0000-0002-2912-0001
Additional Information:© 2003 ASM International & TMS-The Minerals, Metals and Materials Society. Received 08 January 2003. This work was supported by the Sandia National Laboratories (Livermore, CA), Dr. D.D. Dawson, Scientific Contact, which is gratefully acknowledged. The authors thank Professor A. Gilat, Ohio State University, for sharing the unpublished torsional data on 1018 steel. One of the authors (GR) acknowledges support from the Office of Naval Research (Dr. J. Christodoulou, Scientific Officer) for his work on Dynamic Behavior of Steels, which has led to the development of the experimental techniques used in the present research.
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Sandia National LaboratoriesUNSPECIFIED
Office of Naval Research (ONR)UNSPECIFIED
Subject Keywords:Material Transaction; Flow Stress; Shear Band; High Strain Rate; Gage Section
Issue or Number:12
Record Number:CaltechAUTHORS:20191008-092617084
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Official Citation:Vural, M., Ravichandran, G. & Rittel, D. Metall and Mat Trans A (2003) 34: 2873.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99141
Deposited By: Tony Diaz
Deposited On:08 Oct 2019 18:06
Last Modified:16 Nov 2021 17:44

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