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

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference contributionScientificvertaisarvioitu

3 Sitaatiot (Scopus)

Abstrakti

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.

AlkuperäiskieliEnglanti
OtsikkoESAFORM 2016
AlaotsikkoProceedings of the 19th International ESAFORM Conference on Material Forming
KustantajaAmerican Institute of Physics
Vuosikerta1769
ISBN (elektroninen)9780735414273
DOI - pysyväislinkit
TilaJulkaistu - 19 lokakuuta 2016
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaInternational ESAFORM Conference on Material Forming - Nantes, Ranska
Kesto: 27 huhtikuuta 201629 huhtikuuta 2016
Konferenssinumero: 19

Conference

ConferenceInternational ESAFORM Conference on Material Forming
LyhennettäESAFORM
Maa/AlueRanska
KaupunkiNantes
Ajanjakso27/04/201629/04/2016

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