The Effect of the Energy Release Rate on the Local Damage Evolution in TRIP Steel Composite Reinforced with Zirconia Particles

Abstract

In this study, the effect of the energy release rate on the transformation-induced plasticity (TRIP) steel composite reinforced with 5 vol% ceramic particles is determined using the crystal plasticity simulation of the coupled brittle-ductile damage model and validated by experimental results. A miniature dog bone tensile sample is subjected to an interrupted in situ quasi-static tensile test up to a true strain of 20.3%. Using the commercial digital image correlation program VEDDAC and the image processing method in MATLAB, the test data are utilized to monitor the progress of local microstrain and damage. The impact of the energy release rate of ceramic particles is investigated by simulation using a coupled crystal plasticity-dislocation density model with ductile–brittle criteria for the corresponding phases. It can be shown that the local deformations predicted by the numerical simulation and the experimental data are qualitatively comparable. The damage pixel of the experiment, smaller Ecr (1.0 × 108), and larger Ecr (1.2 × 108) cases of energy release rates are 4.9%, 4.3%, and 5.1%, respectively. Furthermore, on a global strain of 20.3%, the relative error between simulation and experimental validation of smaller Ecr (1.0 × 108) and larger Ecr (1.2 × 108) cases is 12.2% and 4%, respectively.

Interfacial Stresses for a Coated Irregularly Shaped Hole Embedded in an Infinite Solid under Point Heat Singularity

“…The approximate correction term C * 1m is derived by substituting the term φ b1 (ζ) into Equation (24). Lastly, the actual stress function φ 1 (ζ) could be solved by substituting the approximate correction term C * 1m into Equation (22). The second iteration for the interface L 1 is considered after the stress function φ 1 (ζ) is determined.…”

“…In experimental observation, different shape inclusions can be microstructurally identified in MMC as transformation induced by plasticity-steel (TRIP) with 5% Mg-YSZ particles. In Figure 1, the ceramic particles of Mg-YSZ can be recognized as a triangle (Figure 1a), quadrilateral (Figure 1b), and polygon (Figure 1c) shaped inclusions [21,22]. Hence, numerous researchers studied the irregular shape inclusion problem theoretically [23][24][25][26][27].…”

“…Hence, numerous researchers studied the irregular shape inclusion problem theoretically [23][24][25][26][27]. [21,22], and (d) macrostructure of the hole, iron oxide, and steel matrix [28].…”

“…This composite system, including irregular holes, coating layers, and matrix has been discussed under different conditions [29][30][31][32][33]. However, the previous [21,22], and (d) macrostructure of the hole, iron oxide, and steel matrix [28].…”

“…Figure 1. (a) Triangle-shaped inclusion, (b) quadrilateral-shaped inclusion, (c) polygonal-shaped inclusion[21,22], and (d) macrostructure of the hole, iron oxide, and steel matrix[28].…”