Damage and fracture loci for a dual-phase steel and a high-strength low-alloyed steel: Revealing the different plastic localization-damage-ductile fracture pattern

Junhe Lian*, Sebastian Münstermann, Wolfgang Bleck

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

2 Citations (Scopus)

Abstract

The ductile fracture locus has been developed in the recent years as a relevant tool to predict the ductile fracture and assess the structure safety. In the various developed models, the occurrence of the final fracture or the initiation of the fracture is considered as the critical phase of deformation for materials or structures. However, in the application of high-strength steels, the damage onset and evolution are of significant importance in the forming processes, as they are naturally interacting with the plastic localization and ductile fracture and eventually creating various possible failure patterns. The present study contributes to a demonstration of the differences of these features in different steels by quantitatively comparing the material parameters of a hybrid damage mechanics model. A dual-phase steel sheet (DP600) and a high-strength low-alloy steel plate (S355J2+N), which show very different relation patterns between damage and fracture, are investigated. The aim of this study is to compare the plastic localization, damage and fracture loci of them and reveal the differences in their localization-damage initiation-ductile fracture patterns. The reasons for the observed different patterns are discussed and it is concluded that the microstructural features are ultimately contributing to the different patterns and the criteria for evaluating the cold formability of these steels shall be varied depending on their failure patterns.

Original languageEnglish
Title of host publicationESAFORM 2016
Subtitle of host publicationProceedings of the 19th International ESAFORM Conference on Material Forming
PublisherAmerican Institute of Physics
Volume1769
ISBN (Electronic)9780735414273
DOIs
Publication statusPublished - 19 Oct 2016
MoE publication typeA4 Article in a conference publication
EventInternational ESAFORM Conference on Material Forming - Nantes, France
Duration: 27 Apr 201629 Apr 2016
Conference number: 19

Conference

ConferenceInternational ESAFORM Conference on Material Forming
Abbreviated titleESAFORM
CountryFrance
CityNantes
Period27/04/201629/04/2016

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