Strain rate effects on the mechanical behavior of two Dual Phase steels in tension

Cadoni, Ezio; Singh, Nilamber Kumar; Forni, Daniele; Singha, M.K.; Gupta, Neelam

doi:10.1140/epjst/e2016-02638-3

Cited by 36 publications

(12 citation statements)

References 23 publications

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“…In order to explain the change of the work hardening rate with applied strain rate, the adiabatic heating during the tensile testing should be firstly considered. For the low strain rate range, the adiabatic heating is normally ignored [10,14]. The adiabatic temperature rise (∆T) at the strain rate from 1 to 1000 s −1 was calculated as follows:…”

Section: Strain Hardening Behaviormentioning

confidence: 99%

“…This might be due to the increased adiabatic temperature rise at high strain rates. The adiabatic heating can reduce the bonding strength among atoms, decompose the cell structure and decrease the energy of the grain boundary as well as the particles diffusion, which will result in softening [7,14,19,27,28]. At the low strain rate stage, the adiabatic temperature rise is negligible; as such the change of PUE is limited.…”

Section: Fracture Behaviormentioning

confidence: 99%

“…Song et al [13] studied the deformation behavior of the DP1000 steel by the JC and Zerilli-Armstrong (ZA) model, and found that the ZA model can reflect the deformation behavior more accurately at strain rates from 10 −4 to 2000 s −1 . Cadoni et al [14] compared the dynamic mechanical behavior of the DP1200 and DP1400 steel, and observed that the two steels had good potential to absorb energy, and the DP1400 possessed a lower strain rate sensitivity. Wang et al [15] investigated the high strain rate behavior of some DP steels and a martensitic (MS) steel.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Behavior of Two Ferrite–Martensite Dual-Phase Steels over a Broad Range of Strain Rates

Liang

Zhao

et al. 2018

Metals

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The present study concerns the deformation and fracture behavior of two ferrite-martensite dual phase steels (FMDP660 and FMDP780) with different phase fractions subjected to different strain rate (0.001 s −1 to 1000 s −1 ) tensile testing. For both steels, the yield strength (YS) monotonically increased with strain rates, whereas the values of ultimate tensile strength (UTS), uniform elongation (UE) and post-uniform elongation (PUE) were maintained stable at the low strain rate range (0.001-0.1 s −1 ), followed by a significant increase with strain rate at high strain rate levels (0.1-1000 s −1 ). The FMDP780 steel with a higher fraction of martensite possessed a stronger strain rate sensitivity of tensile strength and elongation (UE and PUE) values at the high strain rate stage, compared with the FMDP660 sample. The change of UTS and UE with different strain rates and phase fractions was highly related to the strain hardening behavior, which was controlled by the dislocation multiplication in ferrite, as validated by transmission electron microscopy (TEM). The fracture surface of the two steels was characterized by dimpled-type fracture associated with microvoid formation at the ferrite-martensite interfaces, regardless of the strain rates. The change of the dimple size and PUE value of the two steels with strain rates was attributed to the effect of adiabatic heating during tensile testing.

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Section: Strain Hardening Behaviormentioning

confidence: 99%

Section: Fracture Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical Behavior of Two Ferrite–Martensite Dual-Phase Steels over a Broad Range of Strain Rates

Liang

Zhao

et al. 2018

Metals

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“…Let us compare theoretical dependencies of the yield stress on strain rate, calculated by the CS model, the JC model and the IT criterion. Using experimental results of tension in split Hopkinson bar tests [47] of DP1200 steel ( y =1.1 GPa; E=210 GPa) and DP 1400 steel ( y =1.3 GPa; E=210 GPa) we examine efficiencies of the CS model and the IT criterion (Figs. 1 and 2).…”

Section: Definition Of Yield Point In Numerical Modelsmentioning

confidence: 99%

Comparative Analysis of Dynamic Plasticity Models

Selyutina

Petrov

2018

Reviews on Advanced Materials Science

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In the paper, a new phenomenological interpretation of some of the principal temporal effects of high-rate plastic deformation of metals from a united viewpoint is represented. A comparative analysis of some of the well-known dynamic plastic deformation models is given. Influence of strain rate on the stress-strain relation in a wide range of strain rates for different types of aluminum alloys and steels is described by the relaxation model of plasticity, by original and improved empirical Johnson-Cook models, and by the phenomenological Rusinek-Klepaczko model. It is shown that the structural-time model (“the relaxation model of plasticity”) is capable to effectively predict a wide spectrum of materials responses to fast and slow dynamic loading.

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“…It is widely accepted that the plastic flow behaviors and the corresponding deformation mechanisms are highly dependent on the loading rate for metals and alloys [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. It is also well known that the observed resistance to plastic deformation is a rate-controlling process and can be affected by the strain rate [23][24][25]27,28].…”

Section: Introductionmentioning

confidence: 99%

Strain Rate Effect on Tensile Behavior for a High Specific Strength Steel: From Quasi-Static to Intermediate Strain Rates

Wang

Yang

et al. 2017

Metals

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Abstract:The strain rate effect on the tensile behaviors of a high specific strength steel (HSSS) with dual-phase microstructure has been investigated. The yield strength, the ultimate strength and the tensile toughness were all observed to increase with increasing strain rates at the range of 0.0006 to 56/s, rendering this HSSS as an excellent candidate for an energy absorber in the automobile industry, since vehicle crushing often happens at intermediate strain rates. Back stress hardening has been found to play an important role for this HSSS due to load transfer and strain partitioning between two phases, and a higher strain rate could cause even higher strain partitioning in the softer austenite grains, delaying the deformation instability. Deformation twins are observed in the austenite grains at all strain rates to facilitate the uniform tensile deformation. The B2 phase (FeAl intermetallic compound) is less deformable at higher strain rates, resulting in easier brittle fracture in B2 particles, smaller dimple size and a higher density of phase interfaces in final fracture surfaces. Thus, more energy need be consumed during the final fracture for the experiments conducted at higher strain rates, resulting in better tensile toughness.

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Strain rate effects on the mechanical behavior of two Dual Phase steels in tension

Cited by 36 publications

References 23 publications

Mechanical Behavior of Two Ferrite–Martensite Dual-Phase Steels over a Broad Range of Strain Rates

Mechanical Behavior of Two Ferrite–Martensite Dual-Phase Steels over a Broad Range of Strain Rates

Comparative Analysis of Dynamic Plasticity Models

Strain Rate Effect on Tensile Behavior for a High Specific Strength Steel: From Quasi-Static to Intermediate Strain Rates

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