Failure characteristics of advanced high strength steels at macro and micro scales

The advanced high strength steels (AHSS) have gained major attention from research groups across the world especially in the last two decades. The exact description of the forming behavior of these steels has several challenges associated with it. The origin of these challenges is related to complex...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2019-04, Vol.754, p.411-427
Main Authors: Barnwal, Vivek K., Lee, Shin-Yeong, Kim, Jin-Hwan, Barlat, Frédéric
Format: Article
Language:English
Subjects:
AHSS
Computer simulation
Deformation mechanisms
Digital imaging
Ductile fracture
Failure characteristics
Fracture mechanics
High strength steels
Numerical modeling
Parameter identification
Shear tests
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The advanced high strength steels (AHSS) have gained major attention from research groups across the world especially in the last two decades. The exact description of the forming behavior of these steels has several challenges associated with it. The origin of these challenges is related to complex forming behavior and failure characteristics of AHSS sheets at macro and micro scale. In the present study, the fracture characteristics of two important AHSSs, i.e. DP980 and TRIP1180, were investigated using uniaxial tension and shear tests. The critical strains were calculated considering both necking and fracture using digital image correlation (DIC) technique. The deformed specimens were examined at macro and micro scale to understand the fracture mechanisms of both steels. Numerical simulations were performed for identification and validation of constitutive parameters. A simple fracture law was used to predict the fracture and the results were compared with the experiments. Reasonable fracture prediction was achieved for both DP980 and TRIP1180.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2019.03.087