Mechanical behaviour of dual-phase high-strength steel under high strain rate tensile loading

Qin, Jianhua; Chen, Rong; Wen, Xu; Lin, Yuliang; Liang, Minzu; Lu, Fangyun

doi:10.1016/j.msea.2013.07.091

Cited by 70 publications

(31 citation statements)

References 20 publications

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“…Once the same sub‐image in the deformed image was identified, the local displacements could be readily quantified. As a quantitative measurement approach, the DIC is widely used in dynamic fracture experiments …”

Section: Methodsmentioning

confidence: 99%

“…As a quantitative measurement approach, the DIC is widely used in dynamic fracture experiments. 31,32 In the present work, images with a resolution of 384 × 224 pixels and a frame rate of 40 000 fps (i.e. an inter-frame time of 25 μs) were recorded with a Photron FASTCAMSA-1 high-speed camera (Photron Co. Ltd, Tokyo, Japan).…”

Section: Digital Image Correlation Techniquementioning

confidence: 99%

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Experimental studies on mixed‐mode dynamic fracture behaviour of aluminium alloy plates with narrow U‐notch

Wen

Chen

et al. 2016

Fatigue Fract Eng Mat Struct

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Mixed‐mode dynamic fracture behaviour of cast aluminium alloy ZL205A thin plates with narrow U‐notch was studied by split Hopkinson tensile bar apparatus. Specimens with different loading angles were designed to realize different fracture modes. The same loading condition was maintained during the tests. Recovery specimens show that crack propagates along the notch direction. Force–elongation relations show that with the loading angle increasing, the fracture force increases while the final elongation decreases. Deformation and fracture process was observed by a high‐speed camera. Displacement distribution around the crack was calculated through digital image correlation technique. Based on the photos and displacement results, initiation time of the crack was derived. Besides, two stress components (normal stress and shear stress) applied on the fracture surface were investigated. Results show that crack initiation stresses at different loading angles satisfy the ellipse equation. Pure mode I and II fracture stresses are 425.3 and 236.7 MPa, respectively. Furthermore, specific fracture energy of different specimens was calculated. The energy data vary with loading angle and located on an approximate upward parabolic curve. From the curve, the minimum specific fracture energy of the thin plate specimen is 42.0 kJ/m2 under loading angle of 76.3°.

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Section: Methodsmentioning

confidence: 99%

Section: Digital Image Correlation Techniquementioning

confidence: 99%

Experimental studies on mixed‐mode dynamic fracture behaviour of aluminium alloy plates with narrow U‐notch

Wen

Chen

et al. 2016

Fatigue Fract Eng Mat Struct

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“…The microstructure of dual phase steels is characterized by a ferrite matrix embedding a second martensite phase which confers higher strength but less ductility if compared to the AISI304 [27].…”

Section: Methodsmentioning

confidence: 99%

Enhancement of static strength and long term durability of steel/epoxy joints through a fiber laser surface pre-treatment

Rotella

Alfano

Schiefer

et al. 2015

International Journal of Adhesion and Adhesives

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“…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]. The quasi-static tensile behaviors and the dynamic behaviors at high strain rates (~10 3 /s) for TRIP steels, TWIP steels, DP steels and HSSS have been well characterized in previous research [1,2,20,[41][42][43][44][45][46][47][48][49][50], while there is very limited experimental data on various steels at the intermediate strain rates (from 1 to 100/s) [51][52][53][54][55], which is an extremely important transition region in application of automobile industry, since vehicle crushing often happens in this strain rate range or within an even higher strain rate range. Thus, the potential applications for the HSSS in the automobile industry require a comprehensive understanding of deformation physics subjected to dynamic loading at intermediate strain rates.…”

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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Mechanical behaviour of dual-phase high-strength steel under high strain rate tensile loading

Cited by 70 publications

References 20 publications

Experimental studies on mixed‐mode dynamic fracture behaviour of aluminium alloy plates with narrow U‐notch

Experimental studies on mixed‐mode dynamic fracture behaviour of aluminium alloy plates with narrow U‐notch

Enhancement of static strength and long term durability of steel/epoxy joints through a fiber laser surface pre-treatment

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

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