High-strain-rate plastic deformation and fracture behaviour of Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy at room temperature

Ran, Chun; Chen, Pengwan; Li, Ling; Zhang, Wangfeng; Liu, Yanlong; Zhang, Xiao

doi:10.1016/j.mechmat.2017.08.007

Cited by 41 publications

(21 citation statements)

References 28 publications

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“…The average size of the dimples under quasi-static loading is bigger than that under dynamic condition. Similar observation was reported by Ran et al [13], in which they reported that the size and depth of the dimples decrease with increasing strain rate. Figure 12 shows the fracture surface of the NSSS under the dynamic and quasi-static (0.001 s -1 ) loadings.…”

Section: Dynamic Test (Shpb)supporting

confidence: 90%

“…Different test apparatuses, such as split Hopkinson bar [9], gas gun [10], drop-weight test [11], and uniaxial hydraulic apparatus have been used for this purpose. Meanwhile, different geometries, such as torsional sample [12], sheet sample [1], flat or cylindrical hat-shaped sample [13,14], shear compression specimen [15][16][17], double shear sample [18], compact forced simple shear sample [19], and single-or double-edged sample [11] were used in these techniques. Among these specimens, shear deformation is constrained in specific sections because of their geometrical discontinuities.…”

Section: Introductionmentioning

confidence: 99%

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A New S-Shape Specimen for Studying the Dynamic Shear Behavior of Metals

Arab

Guo

Zhou

et al. 2019

Metals

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A new S-shaped specimen geometry is developed in this study to investigate the shear behavior of materials under dynamic shear condition. Traditionally, hat-shaped geometry is used to study the dynamic shear of materials by a conventional split Hopkinson pressure bar apparatus. However, in this geometry, the force equilibrium on the two sides of the sample is difficult to fulfill, and the stress field in the shear region is not homogeneous. Hence, the calculated shear stress-strain curve from this geometry is not precise. To overcome this problem, the new S-shaped specimen is designed to achieve accurate shear stress-strain curve. This geometry can be used in a wide range of strain rates and does not require additional machining process for microstructure observation. The new S-shaped specimen is successfully coupled with digital image correlation method because of the flat surface. Digital image correlation results indicate that the fracture patterns of the new S-shaped specimen occur with maximum shear strains in the shear region in the middle of the sample. This result is also validated by finite element model simulation. The new S-shaped specimen geometry can be used to study the dynamic shear behavior of various metals.Metals 2019, 9, 838 2 of 17 force equilibrium [11]. Thus, the calculated shear stress-strain from this geometry is a rough estimate and inaccurate [19,23]. In addition, the shearing region rotates during testing due to the overlapping nature of the shear area in this geometry. To overcome these problems, Ran et al. [24] adopted the flat hat-shaped sample combined with digital image correlation (DIC) measurement. They measured force and punching displacement from the split Hopkinson pressure bar (SHPB) and shear strain by the DIC method. They achieved accurate strain rate and also calculated the shear engineering stress and strain using the DIC method. However, without using the DIC method, obtaining the shear stress-strain curve is impossible using this geometry. Rittel et al.[3] developed a new geometry for shear test. In this sample, by applying compressive loading a shear dominant field occurs in the gauge section. This geometry can be used in static and dynamic loadings, as well as in different temperatures. However, this sample design does not constitute a 'simple' shear loading stress state within the gauge section but a rather three-dimensional stress state. Moreover, this geometry leads to a radial inertial effect of the sample motion under dynamic loading [19]. Recently, Xu et al. [11] proposed a new double side sample to study the shear band. They observed good agreement between the experimental and simulation results in a wide range of strain rates. However, they designed a special sample fixture to ensure that the shear would be symmetrical. They also used an aluminium bar as the transmitted bar because of the weak transferred pulse. Gray et al. [19] also designed a compact forced simple shear sample to study shear localization in materials. Although this sample could produce pu...

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Section: Dynamic Test (Shpb)supporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

A New S-Shape Specimen for Studying the Dynamic Shear Behavior of Metals

Arab

Guo

Zhou

et al. 2019

Metals

Self Cite

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“…Two titanium alloys were selected for this study: commercial Ti-64 and Ti-55511 [ 18 ], both supplied as extruded rods in the as-received condition. The β transus temperatures for Ti-64 and Ti-55511 alloys are approximately 980 and 860 °C, respectively.…”

Section: Materials and Experimental Techniquesmentioning

confidence: 99%

Dynamic Shear Deformation and Failure of Ti-6Al-4V and Ti-5Al-5Mo-5V-1Cr-1Fe Alloys

Ran

Chen

2018

Materials

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To study the dynamic shear deformation and failure properties of Ti-6Al-4V (Ti-64) alloy and Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloy, a series of forced shear tests on flat hat shaped (FHS) specimens for the two investigated materials was performed using a split Hopkinson pressure bar setup. The evolution of shear deformation was monitored by an ultra-high-speed camera (Kirana-05M). Localized shear band is induced in the two investigated materials under forced shear tests. Our results indicate that severe strain localization (adiabatic shear) is accompanied by a loss in the load carrying capacity, i.e., by a sudden drop in loading. Three distinct stages can be identified using a digital image correlation technique for accurate shear strain measurement. The microstructural analysis reveals that the dynamic failure mechanisms for Ti-64 and Ti-55511 alloys within the shear band are of a cohesive and adhesive nature, respectively.

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“…Balaykin et al [12] conducted high temperature bending test on Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy, and analyzed the relationship between the homogeneity of grain structure and annealing time. Ran et al [13] conducted static and dynamic compression experiments on TC18 titanium alloy, and studied the plastic deformation and fracture behavior of TC18 titanium alloy at room temperature, medium, and high strain rate. The results show that the strain hardening effect and strain rate strengthening effect of TC18 titanium alloy are obvious, and collapse of the specimens occurs along a plane inclined at an angle of about 45 • to the compression axis under quasi-static and dynamic compression loads at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Study on Dynamic Mechanical Properties and Constitutive Model Construction of TC18 Titanium Alloy

Zhang

Wang

et al. 2019

Metals

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In order to investigate the static and dynamic mechanical properties of TC18 titanium alloy, the quasi-static stress–strain curve of TC18 titanium alloy under room temperature was obtained by DNS 100 electronic universal testing machine (Changchun Institute of Mechanical Science Co., Ltd., Changchun, China). Meanwhile, the flow stress–strain curves under different temperatures and strain rates are analyzed by split Hopkinson pressure bar (SHPB) device with synchronous assembly system. On the basis of the two experimental data, the JC constitutive model under the combined action of high temperature and impact load is established using the linear least squares method. The results show the following: the yield strength and flow stress of TC18 titanium alloy increase slowly with the increase of the strain rate, and the strain value corresponding to the yield strength is reduced. With the increase of strain, the flow stress increases at first and then decreases at different temperatures. The strain value corresponding to the transition point rises with the temperature increase, and the corresponding stress value remains basically unchanged. With the increase of experimental temperature, the flow stress shows a downward trend, and the JC constitutive model can predict the plastic flow stress well.

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High-strain-rate plastic deformation and fracture behaviour of Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy at room temperature

Cited by 41 publications

References 28 publications

A New S-Shape Specimen for Studying the Dynamic Shear Behavior of Metals

A New S-Shape Specimen for Studying the Dynamic Shear Behavior of Metals

Dynamic Shear Deformation and Failure of Ti-6Al-4V and Ti-5Al-5Mo-5V-1Cr-1Fe Alloys

Study on Dynamic Mechanical Properties and Constitutive Model Construction of TC18 Titanium Alloy

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