Mechanical, microstructural behaviour and modelling of dual phase steels under complex deformation paths

Liao, Juan; Sousa, J. A. de; Lopes, A. B.; Xue, Xin; Barlat, Frédéric; Péreira, A.

doi:10.1016/j.ijplas.2016.03.010

Cited by 62 publications

(32 citation statements)

References 64 publications

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“…DP steel contains a soft ferrite matrix with hard martensitic "islands". It exhibits good performance during the forming processes [29]. Figure 1 shows the microstructure of the experimental base material by means of a Scanning Electron Microscope (SEM) (Hitachi, Tokyo, Japan).…”

Section: Base Materials Characterization: Dp1000 Steelmentioning

confidence: 99%

Effects of Pulsed Nd:YAG Laser Welding Parameters on Penetration and Microstructure Characterization of a DP1000 Steel Butt Joint

Xue

Péreira

Amorim

et al. 2017

Metals

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Abstract:Of particular importance and interest are the effects of pulsed Nd:YAG laser beam welding parameters on penetration and microstructure characterization of DP1000 butt joint, which is widely used in the automotive industry nowadays. Some key experimental technologies including pre-welding sample preparation and optimization design of sample fixture for a sufficient shielding gas flow are performed to ensure consistent and stable testing. The weld quality can be influenced by several process factors, such as laser beam power, pulse duration, overlap, spot diameter, pulse type, and welding velocity. The results indicate that these key process parameters have a significant effect on the weld penetration. Meanwhile, the fusion zone of butt joints exhibits obviously greater hardness than the base metal and heat affected zone of butt joints. Additionally, the volume fraction of martensite of dual-phase steel plays a considerable effect on the hardness and the change of microstructure characterization of the weld joint.

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Section: Base Materials Characterization: Dp1000 Steelmentioning

confidence: 99%

Effects of Pulsed Nd:YAG Laser Welding Parameters on Penetration and Microstructure Characterization of a DP1000 Steel Butt Joint

Xue

Péreira

Amorim

et al. 2017

Metals

Self Cite

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“…On the other hand, the features of their mechanical behavior (such as distribution of stresses/strains between microconstituents) during plastic deformation, work hardening, shear banding, local crack initiation and growth, etc. have also been thoroughly investigated on both macro-and micro-scale, via experiments and simulation [20][21][22][23][24][25][26][27]. Impact resistance is one of the most important properties of AHSS for automotive applications.…”

Section: Impact Resistancementioning

confidence: 99%

Adiabatic heating and energy absorption capability of an advanced high strength steel during drop weight impact testing

Xia

Palomar

Sabirov

2020

Materials Science and Engineering: A

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The manuscript focuses on the energy absorption capability of an advanced high strength steel during drop weight impact testing. The in-situ measurements of temperature during impact resistance testing of samples revealed intensive adiabatic heating effect with the peak temperature of 225 ℃ at the top of the dome resulting in the local softening effect. The drop weight impact resistance of the material under present testing condition is 90 J. Microstructural characterization demonstrated that dislocation glide and formation of substructure is the main deformation mechanism. Analysis of fracture surface of cracked samples (tested with the impact energy of > 90 J) revealed ductile failure mode. The energy required for formation of fracture surface was calculated by quantitative analysis of the 3D digital models generated using microscopy images of the fracture surface taken from different angles. This energy is negligibly lower compared to the total energy spent for plastic deformation of the material.

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“…As can be seen from the pole figures, the orientation aggregation intensities of DP800 steel are weak. The specimen presents a typical cold-rolled and annealed texture [33,47,48].…”

Section: Texture Measurementmentioning

confidence: 99%

Study of the Mechanical Behavior of Dual-Phase Steel Based on Crystal Plasticity Modeling Considering Strain Partitioning

Dan

Ren

et al. 2018

Metals

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The similar crystal structures of martensite (BCT) and ferrite (BCC) cause difficulty in distinguishing the grain orientations of individual phases in dual-phase (DP) steels. A dislocation-based multiphase mixed hardening model is presented, considering both ferrite and martensite strain partitioning, to describe the texture-dependent mechanical behavior of DP steels more precisely. This model is based on the ideals that (i) the volume fractions of the constituent phases and the corresponding strain partitioning function are obtained through in situ tensile experimentation, and (ii) the grain orientations of ferrite and martensite are assumed to be in accordance with the overall texture. We applied the model to calculate the macroscopic and microscopic mechanical behavior of DP800 steel using a crystal plasticity finite element (CPFE) code. The results show that the calculated stress-strain response and textural evolution are in good agreement with the experimental results. The dislocation evolution indicates that the rapid hardening of ferrite induces a high hardening rate for DP steels early in plastic deformation. In addition, for the grains corresponding to the texture center orientations of DP800, the activity and dislocation density evolutions of the slip systems are studied.

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Mechanical, microstructural behaviour and modelling of dual phase steels under complex deformation paths

Cited by 62 publications

References 64 publications

Effects of Pulsed Nd:YAG Laser Welding Parameters on Penetration and Microstructure Characterization of a DP1000 Steel Butt Joint

Effects of Pulsed Nd:YAG Laser Welding Parameters on Penetration and Microstructure Characterization of a DP1000 Steel Butt Joint

Adiabatic heating and energy absorption capability of an advanced high strength steel during drop weight impact testing

Study of the Mechanical Behavior of Dual-Phase Steel Based on Crystal Plasticity Modeling Considering Strain Partitioning

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