A technique for measuring the dynamic behavior of materials at high temperatures

Lennon, Andrew; Ramesh, K.T.

doi:10.1016/s0749-6419(98)00056-4

Cited by 91 publications

(51 citation statements)

References 12 publications

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“…In order to heat the specimen, one may use a furnace [10,11], an induction-coil heater [12], a radiant heating system [13], an infra-red spot heater [14], or an electrical pulse heating system [15]. If the bars are heated together with the specimen, the mechanical properties of the heated portions of the bars will be changed.…”

Section: Elevated-temperature Shpb Setupmentioning

confidence: 99%

“…This temperature gradient in the bars significantly affects the wave propagation. Chiddister and Malvern [10] might have been the first to discuss the wave reflection and transmission in the bars with thermal gradients. The temperature gradients must be measured and the effects of the thermal gradients must be numerically corrected, particularly when the temperature is 600°C or higher in steel bars.…”

Section: Elevated-temperature Shpb Setupmentioning

confidence: 99%

“…Up to date, investigations of dynamic recrystallization have been limited to low and intermediate strain rates. High-rate mechanical characterization of alloys at elevated temperatures was performed in the past [5][6][7][8][9][10][11]. In this work, we have integrated several experimental techniques in one dynamic experiment to investigate recrystallization under high rate and elevated temperature conditions for the first time.…”

Section: Introductionmentioning

confidence: 99%

“…The SHPB has been explored to dynamically characterize materials including alloys at elevated temperatures [5][6][7][8][9][10][11]. Different researchers have developed various elevated-temperature SHPB techniques to obtain high-rate stress-strain behavior at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

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High-rate Characterization of 304L Stainless Steel at Elevated Temperatures for Recrystallization Investigation

et al. 2009

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An integrated experimental technique was developed for high-rate mechanical characterization of 304L stainless steel at elevated temperatures by using a modified split Hopkinson pressure bar (SHPB). A sandwich structure consisting of two platens and the specimen in between was heated before mechanical loading while the bars were maintained at room temperature to eliminate the temperature gradient effect on the wave propagation in the bars. Upon contacting the cold bars, temperature gradients form in the platens, leaving the temperature in specimen constant and uniform. Pulse shaping techniques were employed to maintain constant strain-rate deformation and dynamic stress equilibrium in the specimen. Dynamic compressive stress-strain curves at elevated temperatures for the 304L stainless steel were obtained. To relate recrystallization to impact loading, a momentum trapping system was employed to apply a single loading on the specimen during one dynamic experiment. We also controlled the quenching time to study its effect on recrystallization.

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Section: Elevated-temperature Shpb Setupmentioning

confidence: 99%

Section: Elevated-temperature Shpb Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-rate Characterization of 304L Stainless Steel at Elevated Temperatures for Recrystallization Investigation

et al. 2009

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“…Experimentally, after Hopkinson and Kolsky's early work [1][2][3][4][5][6], the Split Hopkinson pressure bar (SHPB) gradually became a widely accepted facility to test materials' mechanical properties under dynamic loading at the strain rate of 10 3 -10 4 /s in modern mechanical laboratory [7][8][9][10][11][12]. The SHPB setup usually consists of striker, incident bar and transmitted bars, which are all the same diameter cylindrical bars, made from hard materials.…”

Section: Introductionmentioning

confidence: 99%

On the Plastic Wave Propagation Along the Specimen Length in SHPB Test

Wang

Meyer

2009

Exp Mech

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To observe the plastic wave propagation, an experimental setup is designed with a SHPB facility and a high speed digital camera. Two types of OFHC copper were selected as specimen materials: in the cold work condition and after total annealing, which represent non strain hardening and strain hardening material respectively. The rise time of incident impulse in the SHPB test is relevant to bar's radius. A maximum allowable specimen length and a maximum allowable impact velocity (MAIV) of striker are proposed for the SHPB test. The propagation of plastic waves is observed along specimen length at the beginning of specimen's plastic deformation in SHPB test. However, for both types of material, no plastic wave motion is caught along specimen length for large plastic strain level. Side confinement effect of friction is found to be significant, even with lubricant in the experiment.

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High Rates and Impact Experiments

Ramesh

2008

Springer Handbooks

213

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A technique for measuring the dynamic behavior of materials at high temperatures

Cited by 91 publications

References 12 publications

High-rate Characterization of 304L Stainless Steel at Elevated Temperatures for Recrystallization Investigation

High-rate Characterization of 304L Stainless Steel at Elevated Temperatures for Recrystallization Investigation

On the Plastic Wave Propagation Along the Specimen Length in SHPB Test

High Rates and Impact Experiments

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