Browse Publications Technical Papers 2008-01-1114
2008-04-14

Modeling of Failure Modes Induced by Plastic Strain Localization in Dual Phase Steels 2008-01-1114

Microstructure level inhomogeneities between the harder martensite phase and the softer ferrite phase render the dual phase (DP) steels more complicated failure mechanisms and associated failure modes compared to the conventionally used low alloy homogenous steels. This paper examines the failure mode DP780 steel under different loading conditions using finite element analyses on the microstructure levels. Micro-mechanics analyses based on the actual microstructures of DP steel are performed. The two-dimensional microstructure of DP steel was recorded by scanning electron microscopy (SEM). The plastic work hardening properties of the ferrite phase was determined by the synchrotron-based high-energy X-ray diffraction technique. The work hardening properties of the martensite phase were calibrated and determined based on the uniaxial tensile test results. Under different loading conditions, different failure modes are predicted in the form of plastic strain localization. The local failure mode was closely related to the stress state in the material.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
JOURNAL ARTICLE

An Approach to Model Sheet Failure After Onset of Localized Necking in Industrial High Strength Steel Stamping and Crash Simulations

2008-01-0503

View Details

TECHNICAL PAPER

Characterization of Press Formability of Advanced High Strength Steels Using Laboratory Tests

2004-01-0506

View Details

TECHNICAL PAPER

Structural Durability Enhancement through Spot Welds – An Automated Methodology

2004-01-0879

View Details

X