This research aims to describe the behavior of C45 steel and provide better understanding of the thermomechanical ductile failure that occurs due to accumulation of microcracks and voids along with plastic deformation to enable proper structural design, and hence provide better serviceability. A series of quasi-static tensile tests are conducted on C45 steel at a range of temperatures between 298 K and 923 K for strain rates up to 0.15 s−1. Drop hammer dynamic tests are also performed considering different masses and heights to study the material response at higher strain rates. Scanning electron microscopy (SEM) images are taken to quantify the density of microcracks and voids of each fractured specimens, which are needed to define the evolution of internal defects using an energy-based damage model. The coupling effect of damage and plasticity is incorporated to accurately define the constitutive relation that can simulate the different structural responses of this material. Good correlation was observed between the proposed model predictions and experiments particularly at regions where dynamic strain aging (DSA) is not present.
Flow Stress and Damage Behavior of C45 Steel Over a Range of Temperatures and Loading Rates
American University of Sharjah,
SHJ 26666, United Arab Emirates
Université Paris 8 IUT de Tremblay-en-France,
Louisiana State University,
Baton Rouge, LA 70802
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received June 9, 2016; final manuscript received September 9, 2016; published online February 7, 2017. Assoc. Editor: Taehyo Park.
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Abed, F. H., Saffarini, M. H., Abdul-Latif, A., and Voyiadjis, G. Z. (February 7, 2017). "Flow Stress and Damage Behavior of C45 Steel Over a Range of Temperatures and Loading Rates." ASME. J. Eng. Mater. Technol. April 2017; 139(2): 021012. https://doi.org/10.1115/1.4035488
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