ISSN: 1546-962X
Published Online: 23 April 2009
Page Count: 12

Analysis of Stress Concentration around Inclusions due to Thermally Induced Strain to the Steel Matrix

Allazadeh, M. R.
The Basic Metals Processing Research Institute, Materials Science and Engineering Department, Swanson School of Engineering, University of Pittsburgh, Pittsburgh,PA

Garcia, C. I.
The Basic Metals Processing Research Institute, Materials Science and Engineering Department, Swanson School of Engineering, University of Pittsburgh, Pittsburgh,PA

DeArdo, A. J.
The Basic Metals Processing Research Institute, Materials Science and Engineering Department, Swanson School of Engineering, University of Pittsburgh, Pittsburgh,PA

Lovell, M. R.
Associate Dean for Research, Swanson School of Engineering, University of Pittsburgh, Pittsburgh,PA

(Received 23 July 2008; accepted 19 March 2009)

Abstract

A finite element method (FEM) was employed to aid in the thermodynamic analysis of the cooling process of steel containing nonmetallic inclusions in a homogenous, isotropic, single-phase steel matrix. Three different contact techniques available in ANSYS were used in a 2-D model of Al₂O₃ inclusions in a 1010 steel grade to define different types of inclusion-steel interfaces. Comparisons of these numerical techniques examine the effect of the characteristic of the interface on the residual stress concentration zone around inclusions embedded in a steel matrix with an initially free stress state and their thermal interaction during the cooling process from 1300°C. Results are presented to discuss the significance of the inclusion surface and boundary conditions (axisymmetric and fully constrained) on the stress distribution within the stress concentration zone in the vicinity of the interface.

Keywords:
nonmetallic inclusion-steel matrix interface, thermally induced strain, FEM, inclusion rigidity factor, stress concentration zone

Paper ID: JAI102041
DOI: 10.1520/JAI102041
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