Monotonic and Cyclic Behavior of DIN 34CrNiMo6 Tempered Alloy SteelReportar como inadecuado




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1

Department of Mechanical Engineering, ISEC, Polytechnic Institute of Coimbra, Rua Pedro Nunes, Quinta da Nora, 3030-199 Coimbra, Portugal

2

CEMUC, Department of Mechanical Engineering, University of Coimbra, Rua Luís Reis Santos, Pinhal de Marrocos, 3030-788 Coimbra, Portugal





*

Author to whom correspondence should be addressed.



Academic Editor: Isabel Gutierrez

Abstract This paper aims at studying the monotonic and cyclic plastic deformation behavior of DIN 34CrNiMo6 high strength steel. Monotonic and low-cycle fatigue tests are conducted in ambient air, at room temperature, using standard 8-mm diameter specimens. The former tests are carried out under position control with constant displacement rate. The latter are performed under fully-reversed strain-controlled conditions, using the single-step test method, with strain amplitudes lying between ±0.4% and ±2.0%. After the tests, the fracture surfaces are examined by scanning electron microscopy in order to characterize the surface morphologies and identify the main failure mechanisms. Regardless of the strain amplitude, a softening behavior was observed throughout the entire life. Total strain energy density, defined as the sum of both tensile elastic and plastic strain energies, was revealed to be an adequate fatigue damage parameter for short and long lives. View Full-Text

Keywords: DIN 34CrNiMo6; low-cycle fatigue; high strength steel; martensitic steel; cyclic deformation behavior; monotonic tensile test DIN 34CrNiMo6; low-cycle fatigue; high strength steel; martensitic steel; cyclic deformation behavior; monotonic tensile test





Autor: Ricardo Branco 1,2,* , José D. M. Costa 2, Fernando V. Antunes 2 and Sandra Perdigão 1

Fuente: http://mdpi.com/



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