شماره ركورد كنفرانس :
4561
عنوان مقاله :
Experimental and numerical investigation of failure in a commercial dual phase steel and the effect of microstructure on that
Author/Authors :
A Pourkamali Mechanical Engineering Department - ShahidRajaei Teacher Training University, Tehran , J Kadkhodapour Mechanical Engineering Department - ShahidRajaei Teacher Training University, Tehran , Gh Shadalooyi Mechanical Engineering Department - ShahidRajaei Teacher Training University, Tehran , H Hosseini Toudeshky Aerospace Engineering Department - Amirkabir University of Technology, Tehran , B Anbarlooie Aerospace Engineering Department - Amirkabir University of Technology, Tehran
كليدواژه :
Dual phase steel , failure process , void initiation , tensile test
عنوان كنفرانس :
The Bi-Annual International Conference on Experimental Solid Mechanics and Dynamics ۲۰۱۴
چكيده لاتين :
Dual phase (DP) steels have a microstructure consisting of a ferrite matrix, in which particles of martensite are dispersed. In this work both experimental and numerical methods were employed to investigate the mechanism of failure in DOCOL 600 DP steel. The tensile test for specimens was interrupted in different steps, to capture the mechanism of void initiation and void growth during material failure. Specimens are selected to be parallel to rolling direction and normal to rolling direction. Several kinds of voids in microscopic figures were observed. The macroscopic pattern and microscopic phase’s orientation in failure zone were analyzed. The finite element model of the real microstructure is used and analyzed in order to predict the material behavior. Numerical simulations are able to predict the void initiation in the material. The stress Distribution and plastic strain Distribution reported from the numerical simulation on real micro-structure of material. Deformation localization, which causes severely deformed regions in the material, is most probably the main source of rupture in the final stages of the failure. In the SEM micrographs of the material after failure some voids are observable which can validate the results obtained by the simulation.
