Response characteristics and adiabatic heating during high strain rate for TRIP steel and DP steel

Gao, Yi; Xu, Chao; He, Zhongping; He, Yanlin; Li, Lin

doi:10.1016/s1006-706x(15)60008-5

Cited by 32 publications

(9 citation statements)

References 9 publications

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“…Actually, as the rate of deformation increased, the thermodynamic condition transitioned from isothermal to adiabatic. The conversion of plastic work to heat caused local adiabatic heating in the polymer matrix, but the rapid nature of impact events did not allow enough time for heat to dissipate [42][43][44]. Lienhard et al [25,45] also found that there was a local adiabatic temperature rise in the polymer matrix at high strain rates, and the increase of the local adiabatic temperature rise would be more obvious with the higher the strain rates [42].…”

Section: Failure Mechanism Analysismentioning

confidence: 99%

The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

Cui

Wang

et al. 2019

Polymers

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Long glass fiber reinforced thermoplastic composites have been increasingly used in automotive parts due to their excellent mechanical properties and recyclability. However, the effects of strain rates on the mechanical properties and failure mechanisms of long glass fiber reinforced polypropylene composites (LGFRPPs) have not been studied systematically. In this study, the effects of strain rates (from 0.001 s−1 to 400 s−1) on the mechanical properties and failure mechanism of LGFRPPs were investigated. The results showed that ultimate strength and fracture strain of the LGFRPPs increased obviously, whereas the stiffness remained essentially unchanged with the strain rates from low to high. The micro-failure modes mainly consisted of fibers pulled out, fiber breakage, interfacial debonding, matrix cracking, and ductile to brittle (ductile pulling of fibrils/micro-fibrils) fracture behavior of the matrix. As the strain rates increased, the interfacial bonding properties of LGFRPPs increased, resulting in a gradual increase of fiber breakage at the fracture surface of the specimen and the gradual decrease of pull-out. In this process, more failure energy was absorbed, thus, the ultimate strength and fracture strain of LGFRPPs were improved.

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Section: Failure Mechanism Analysismentioning

confidence: 99%

The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

Cui

Wang

et al. 2019

Polymers

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“…Calculation results show that temperature at a strain‐rate of 1000 s −1 increases almost by 100 °C.If the necking stage is considered, it could increase locally to over 300 °C. For that reason, the adiabatic heating has influenced the ductility of the steel tested significantly by softening of matrix .…”

Section: Resultsmentioning

confidence: 99%

Strain rate effects on tensile deformation behavior of Fe‐3.5Mn‐0.3C‐5Al ferritic based lightweight steel

Yang

et al. 2020

Materialwissenschaft Werkst

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Tensile deformation behavior of Fe‐3.5Mn‐0.3C‐5Al ferritic based lightweight steel was studied in a large range of strain rate (0.001 s−1–1200 s−1). Microstructures of the steel before and after tension were observed. The results show that Fe‐3.5Mn‐0.3C‐5Al lightweight steel has a good strength (820 MPa) and plasticity (40 %) and exhibits excellent combinations of specific strength and ductility (>32000 MPa %) at the strain‐rate of 0.001 s−1 after annealing at 850 °C for 5 minutes then directly quenching into water. The austenite in the steel tested was transformed into α′‐martensite during the tensile deformation process. With an increase in strain rate from 0.001 s−1 to 1200 s−1, tensile strength of the steel investigated increased from 820 MPa to 932 MPa, while its elongation first decreased from 40 % to 15 %, and then increased from 15 % to 29 %. At the strain rate of 1200 s−1, adiabatic heating resulted in temperature rising in matrix, suppressed the transformation of austenite to α′‐martensite. Comparing with transformation induced plasticity steel, the austenite in 3.5Mn lightweight steel is obviously unstable and cannot provide progressive phase transition.

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“…Therefore, using higher strain rates would decrease the volume fraction of stress/strain induced martensite as the strain rate is higher [9,[131][132][133][134]. In multiphase microstructures, the effect of the strain rate follows similar trends [135][136][137].…”

Section: Deformation At a Constant Temperaturementioning

confidence: 98%

Future Trends on Displacive Stress and Strain Induced Transformations in Steels

Eres-Castellanos

García‐Mateo

Caballero

2021

Metals

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Displacive stress and strain induced transformations are those transformations that occur when the formation of martensite or bainitic ferrite is promoted by the application of stress or strain. These transformations have been shown to be one of the mechanisms by which the mechanical properties of a microstructure can be improved, as they lead to a better ductility and strength by the transformation induced plasticity effect. This review aims to summarize the fundamental knowledge about them, both in fully austenitic or in multiphase structures, pointing out the issues that—according to the authors’ opinion—need further research. Knowing the mechanisms that govern the stress and strain induced transformation could enable to optimize the thermomechanical treatments and improve the final microstructure properties.

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Response characteristics and adiabatic heating during high strain rate for TRIP steel and DP steel

Cited by 32 publications

References 9 publications

The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

The Effects of Strain Rates on Mechanical Properties and Failure Behavior of Long Glass Fiber Reinforced Thermoplastic Composites

Strain rate effects on tensile deformation behavior of Fe‐3.5Mn‐0.3C‐5Al ferritic based lightweight steel

Future Trends on Displacive Stress and Strain Induced Transformations in Steels

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