Combined effects of elevated temperatures and high strain rates on compressive performance of S30408 austenitic stainless steel

Li, Lijun; Wang, Rui; Zhao, Hui; Zhang, Haoran; Yan, Rui

doi:10.1016/j.istruc.2021.07.063

Cited by 9 publications

(2 citation statements)

References 31 publications

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“…The high strain rate dependence of the ow stress of metals and alloys from a dislocation mechanics viewpoint has been extensively studied.At higher strain rates, transition from plastic ow (that is controlled by the mobility of the resident dislocation density) to plasticity (that is controlled by dislocation or twin generations at the shock front) is observed [39][40][41]. The increase of the elongation to fracture and tensile strength with the strain rate could be ascribed to the formation of mechanical twins [42].…”

Section: Strain Rate Effect Analysis Of Mhspmentioning

confidence: 98%

“…Generally, a material with ne-grained microstructure will deform at a higher strain rate than a coarse-grained material under the same load. This is because smaller grains will provide more barriers to dislocation motion, which increases the strength of the material and makes it more resistant to plastic deformation [39].…”

Section: Strain Rate Effect Analysis Of Mhspmentioning

confidence: 99%

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Strain Rate Analysis of Efficient Honeycomb Sandwich Panels under Blast Load

Sawant

Patel

2023

Preprint

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Honeycomb sandwich panels are investigated for a broad range of areas as protective structures that can withstand blast loading. The advantage of these panels is that they are light in weight when compared to solid metal plates due to the hollow core and have high energy absorption capabilities. Due to their high bending stiffness, honeycomb sandwich panels have found applications in aerospace, automotive, marine, defense, and railway industries. In order to analyze the effect of blast loading on sandwich panels the experiments that need to be conducted are costly as well as time-consuming. Also, while conducting experiments with explosives, human safety is a major concern. Taking the aforementioned parameters into consideration, modeling and simulation of honeycomb sandwich panels is the better alternative. ABAQUS software has been used in this paper to study the behavior of metallic honeycomb sandwich panels (MHSP) with squared, hexagonal, and circular cores when subjected to blast loads of different kilograms of trinitrotoluene (TNT). The obtained simulation results show that circular core has higher blast resistance as compared to hexagonal and square cores. With the aim of optimizing blast protection characteristics of the sandwich model, effect of gel-filling and addition of Aluminium foamto hollow honeycomb core of the sandwich panelswas investigated.The face plate deflection and energy absorption capacity were found to have improved after these additions. Mass evaluation pertaining to reduction in plate deflection versus increase in weight of the sandwich panel after addition of gel and foam was also performed. The influence of strain rate on the deflection of blast-loaded sandwich panels was also studied. It was found that higher strain rates gave favourable results i.e., lower deformation values. Lastly, energy absorption study of all the various configurations of the sandwich panel was performed.

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Section: Strain Rate Effect Analysis Of Mhspmentioning

confidence: 98%

Section: Strain Rate Effect Analysis Of Mhspmentioning

confidence: 99%

Strain Rate Analysis of Efficient Honeycomb Sandwich Panels under Blast Load

Sawant

Patel

2023

Preprint

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Room‐Temperature Superformability in Novel As‐Cast High‐Entropy Alloy During Compressive Loading

et al. 2022

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Conventional alloys show low compressive strength and strain accommodation due to their propensity for limited strengthening mechanisms and rapid compressive instability. High‐entropy alloys (HEA) may overcome this limitation by metastability engineering. Inspired by this, herein, a dual‐phase Fe44Mn20Cr15Ni7.5Co6Si7.5 HEA (M‐HEA) which shows maximum engineering strength of ≈4.4 GPa at true compressive strain of ≈2.2 (engineering strain of 90%) in as‐cast condition due to controlled hardening and sustained softening response during deformation is presented. The controlled hardening phenomenon (up to 60% strain) is attributed to transformation‐induced plasticity in γ‐phase and nanotwinning in untransformed γ‐phase. The sustained softening is a result of extensive strain accommodation by both γ‐ and β‐phases via dynamic recovery in γ‐phase and shearing of β‐phase during deformation. Hence, this superformability in M‐HEA makes it an excellent material for structural applications in comparison with other conventional alloys and HEAs.

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