Electrohydraulic forming of dual phase steels; numerical and experimental work

2013 ◽  
Author(s):  
Amir Hassannejadasl ◽  
Daniel E. Green ◽  
Sergey F. Golovashchenko
Keyword(s):  
Experimental Work ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Electrohydraulic Forming

Quantitative Microstructural Analysis of Formability Enhancement in Dual Phase Steels Subject to Electrohydraulic Forming

2012 ◽  
Vol 22 (7) ◽  
pp. 2080-2088 ◽  
Author(s):  
Javad Samei ◽  
Daniel E. Green ◽  
Sergey Golovashchenko ◽  
Amir Hassannejadasl
Keyword(s):  
Microstructural Analysis ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Electrohydraulic Forming

Analysis of Failure in Dual Phase Steel Sheets Subject to Electrohydraulic Forming

2014 ◽  
Vol 136 (5) ◽  
Author(s):  
Javad Samei ◽  
Daniel E. Green ◽  
Sergey Golovashchenko
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Dual Phase Steel ◽  
High Strain ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Electrohydraulic Forming ◽  
Steel Sheets ◽  
Conical Die ◽  
The Impact

In previous work, the formability of dual phase steel sheets formed under quasi-static and high strain rate conditions was investigated in macroscale (Golovashchenko et al., 2013, “Formability of Dual Phase Steels in Electrohydraulic Forming,” J. Mater. Process. Technol., 213, pp. 1191–1212) and microscale (Samei et al., 2013, “Quantitative Microstructural Analysis of Formability Enhancement in Dual Phase Steels Subject to Electrohydraulic Forming,” J. Mater. Eng. Perform., 22(7), pp. 2080–2088). The Nakazima test and electrohydraulic forming (EHF) were used for quasi-static and high strain rate forming, respectively. It was shown that dual phase steel sheets exhibit hyperplastic behavior when subject to EHF into a conical die and the micromechanisms of formability improvement were discussed (Samei et al., 2014, “Metallurgical Investigations on Hyperplasticity in Dual Phase Steel Sheets,” ASME J. Manuf. Sci. Eng. (in press)). In this paper, mechanisms of failure in dual phase steels formed under quasi-static and EHF conditions are discussed. For this purpose, the nucleation, growth, and volume fraction of voids were studied. Also, fractography was carried out to understand the different types of fractures in the three grades of dual phase steels. The main objective of this work was to determine how failure was suppressed in the EHF specimens formed in the conical die compared to the Nakazima specimens. The impact of the sheet against the die was found to be the major reason for the delay in failure in the EHF specimens.

Formability of dual phase steels in electrohydraulic forming

2013 ◽  
Vol 213 (7) ◽  
pp. 1191-1212 ◽  
Author(s):  
Sergey F. Golovashchenko ◽  
Alan J. Gillard ◽  
Alexander V. Mamutov
Keyword(s):  
Dual Phase ◽  
Dual Phase Steels ◽  
Electrohydraulic Forming

Effect of quasi-static prestrain on the formability of dual phase steels in electrohydraulic forming

2013 ◽  
Vol 15 (2) ◽  
pp. 201-218 ◽  
Author(s):  
Alan J. Gillard ◽  
Sergey F. Golovashchenko ◽  
Alexander V. Mamutov
Keyword(s):  
Dual Phase ◽  
Dual Phase Steels ◽  
Electrohydraulic Forming

Metallurgical Investigations on Hyperplasticity in Dual Phase Steel Sheets

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Javad Samei ◽  
Daniel E. Green ◽  
Sergey Golovashchenko
Keyword(s):  
Dual Phase Steel ◽  
Microstructural Analysis ◽  
Relative Deformation ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Electrohydraulic Forming ◽  
Steel Sheets ◽  
Two Phases ◽  
Static Conditions ◽  
High Strain Rate Forming

Several researchers have reported that dual phase steel sheets exhibit hyperplasticity, that is, a significant formability improvement under certain high strain rate forming conditions. Hyperplastic behavior of dual phase steels formed using an electrohydraulic forming (EHF) process was previously investigated by the authors at both macro- (Golovashchenko et al., 2013, “Formability of Dual Phase Steels in Electrohydraulic Forming,” J. Mater. Process. Technol., 213, pp. 1191–1212) and microscales (Samei et al., 2013, “Quantitative Microstructural Analysis of Formability Enhancement in Dual Phase Steels Subject to Electrohydraulic Forming,” J. Mater. Eng. Perform., 22(7), pp. 2080–2088). A relative deformation improvement of approximately 20% in ferrite grains and 100% in martensite islands was reported in the EHF specimens compared to specimens formed under quasi-static conditions. In this paper, the remarkable deformation improvements of the constituents are discussed in terms of metallurgical mechanisms of deformation. The nucleation and multiplication of dislocations in ferrite and deformation twinning in martensite were found to be the principal mechanisms responsible for the significant improvements of deformation in EHF. In addition, these mechanisms enhance the plastic compatibility between the two phases which reduces the risk of decohesion and delays the onset of fracture in EHF specimens.

CONTROL OF MICROSTRUCTURES OF FERRITE/ BAINITE (F/B) DUAL-PHASE STEELS AND ANALYSIS OF THEIR RESISTANCE TO DEFORMATION BEHAVIOR

2012 ◽  
Vol 48 (3) ◽  
pp. 298 ◽  
Author(s):  
Wenjin NIE ◽  
Chengjia SHANG ◽  
Hailong GUAN ◽  
Xiaobing ZHANG ◽  
Shaohui CHEN
Keyword(s):  
Deformation Behavior ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Resistance To Deformation

Investigation and Mean-Field Modelling of Microstructural Mechanisms Driving the Tensile Properties of Dual-Phase Steels

2020 ◽  
Author(s):  
Alexandre Mathevon ◽  
Damien Fabrègue ◽  
Véronique Massardier ◽  
Sophie Cazottes ◽  
Philippe Rocabois ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Mean Field ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Field Modelling

scholarly journals Understanding ferrite deformation caused by austenite to martensite transformation in dual phase steels

2021 ◽  
Vol 202 ◽  
pp. 114032
Author(s):  
Vibhor Atreya ◽  
Cornelis Bos ◽  
Maria J. Santofimia
Keyword(s):  
Martensite Transformation ◽  
Dual Phase ◽  
Dual Phase Steels

A crystal plasticity based finite element framework for RVE calculations of two-phase materials: Void nucleation in dual-phase steels

2021 ◽  
Vol 187 ◽  
pp. 103510
Author(s):  
Tuncay Yalçinkaya ◽  
Serhat Onur Çakmak ◽  
Cihan Tekoğlu
Keyword(s):  
Finite Element ◽  
Crystal Plasticity ◽  
Void Nucleation ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Two Phase

Development and validation of multi scale failure model for dual phase steels

2017 ◽  
Vol 124 ◽  
pp. 7-21 ◽  
Author(s):  
K. Perzyński ◽  
A. Wrożyna ◽  
R. Kuziak ◽  
A. Legwand ◽  
L. Madej
Keyword(s):  
Dual Phase ◽  
Failure Model ◽  
Dual Phase Steels ◽  
Multi Scale ◽  
Development And Validation ◽  
Scale Failure
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