Dynamic response and plastic deformation behavior of Ti–5Al–2.5Sn ELI and Ti–8Al–1Mo–1V alloys under high-strain rate

Wang, Yanling; Hui, Songxiao; Liu, Rui; Ye, Wenjun; Yu, Yang; Kayumov, Ravil

doi:10.1007/s12598-014-0238-y

Cited by 13 publications

(6 citation statements)

References 13 publications

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“…Our data on the influence of shear bands orientation on the separation crack position in Ti-5Al-2.5Sn during high speed tension are in agreement with results of Wang et al obtained at dynamic compression [34]. Note that different isomechanical groups with HCP, BCC, and FCC crystalline lattice structure exhibit similar behavior, where the damage nucleates and the crack forms in the zone of shear band intersection under tensile loading conditions [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52].…”

Section: Strain Fields Observation By Digital Image Correlation (Dic)supporting

confidence: 91%

Fracture of Titanium Alloys at High Strain Rates and under Stress Triaxiality

Skripnyak

2020

Metals

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The present study investigates the effect of stress triaxiality on mechanical behavior and fracture of Ti-5Al-2.5Sn alloy in a practical relevant strain rate range from 0.1 to 1000 s−1. Tensile tests were carried out on flat smoothed and notched specimens using an Instron VHS 40/50-20 servo-hydraulic test machine. High-speed video registration was conducted by Phantom 711 Camera. Strain fields on the specimen gauge area were investigated by the digital image correlation method (DIC). The fracture surface relief was studied using digital microscope Keyence VHX-600D. Stress and strain fields during testing of the Ti-5Al-2.5Sn alloy were analyzed by the numerical simulation method. The evolution of strain fields at the investigated loading condition indicates that large plastic deformation occurs in localization bands. The alloy undergoes fracture governing by damage nucleation, growth, and coalescence in the localized plastic strain bands oriented along the maximum shear stresses. Results confirm that the fracture of near alpha titanium alloys has ductile behavior at strain rates from 0.1 to 1000 s−1, stress triaxiality parameter 0.33 < η < 0.6, and temperature close to 295 K.

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Section: Strain Fields Observation By Digital Image Correlation (Dic)supporting

confidence: 91%

Fracture of Titanium Alloys at High Strain Rates and under Stress Triaxiality

Skripnyak

2020

Metals

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“…For α-titanium alloys, experimental investigations of the stress–strain response in low strain-rate tension and high strain-rate compression have been reported. Previous studies have indicated that the mechanical response of Ti–5Al–2.5Sn alloy is sensitive to the strain rate and temperature [ 6 , 7 , 8 , 9 , 10 ]. It has been found that the flow stress of Ti–5Al–2.5Sn alloy increases with the increase of the strain rate and that the strain rate sensitivity parameter, determined from the slope of the log (flow stress) versus log (strain rate) curve, was about 0.3 under quasi-static loading conditions (10 −4 –10 −2 s −1 ).…”

Section: Introductionmentioning

confidence: 99%

“…Experimental results of the tension and tension creep tests of Ti–5Al–2.5Sn alloy at various testing temperatures have shown that basal and prismatic slip systems dominate tensile deformation, while grain boundary sliding predominates in creep deformation [ 8 , 9 ]. The high-rate compression response of Ti–5Al–2.5Sn alloy indicates that its plastic deformation behavior is sensitive to the strain rate, and there exists a significant strain-hardening effect in compression deformation [ 10 ]. Tensile tests of Ti–5Al–2.5Sn alloy have shown that the main fracture mode of this alloy is ductile fracture.…”

Section: Introductionmentioning

confidence: 99%

Strain-Rate-Dependent Tensile Response of Ti–5Al–2.5Sn Alloy

Zhang

Wang

et al. 2019

Materials

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This study is an experimental investigation on the tensile responses of Ti–5Al–2.5Sn alloy over a wide range of strain rates. Uniaxial tension tests within the rate range of 10−3–101 s−1 are performed using a hydraulic driven MTS810 machine and a moderate strain-rate testing system. The high-rate uniaxial tension and tension recovery tests are conducted using a split-Hopkinson tension bar to obtain the adiabatic and isothermal stress–strain responses of the alloy under dynamic loading conditions. The experimental results show that the value of the initial yield stress increases with the increasing strain rate, while the strain rate sensitivity is greater at high strain rates. The isothermal strain-hardening behavior changes little with the strain rate, and the adiabatic temperature rise is the main reason for the reduction of the strain-hardening rate during high strain-rate tension. The electron backscatter diffraction (EBSD) analysis of the post-deformed samples indicates that there are deformation twins under quasi-static and high-rate tensile loadings. Scanning electron microscope (SEM) micrographs of the fracture surfaces of the post-deformed samples show dimple-like features. The Zerilli–Armstrong model is modified to incorporate the thermal-softening effect of the adiabatic temperature rise at high strain rates and describe the tension responses of Ti–5Al–2.5Sn alloy over strain rates from quasi-static to 1050 s−1.

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“…Similar to other metal alloys, the classification of mechanical characteristics of titanium alloys at room temperature mainly focuses on the strain/stress behaviors and formability (forming limit). According to current reports, the strain rate effect of titanium alloys (e.g., Ti-6Al-4V [33], Ti-8Al-1Mo-1V [34], Ti-10V-2Fe-3Al [35], etc.) at room temperature cannot be neglected and will have a significant effect on the forming results of titanium alloys.…”

Section: Deformation Characteristics Of Titanium Alloysmentioning

confidence: 99%

Deformation Characteristics, Formability and Springback Control of Titanium Alloy Sheet at Room Temperature: A Review

Chen

Zhang

et al. 2022

Materials

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Titanium alloy sheets present inferior formability and severe springback in conventional forming processes at room temperature which greatly restrict their applications in complex-shaped components. In this paper, deformation characteristics and formability and springback behaviors of titanium alloy sheet at room temperature are systematically reviewed. Firstly, deformation characteristics of titanium alloys at room temperature are discussed, and formability improvement under high-rate forming and other methods are summarized, especially the impacting hydroforming developed by us. Then, the main advances in springback prediction and control are outlined, including the advanced constitutive models as well as the optimization of processing paths and parameters. More importantly, notable springback reduction is observed with high strain rate forming methods. Finally, potential investigation prospects for the precise forming of titanium alloy sheet in the future are suggested.

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Dynamic response and plastic deformation behavior of Ti–5Al–2.5Sn ELI and Ti–8Al–1Mo–1V alloys under high-strain rate

Cited by 13 publications

References 13 publications

Fracture of Titanium Alloys at High Strain Rates and under Stress Triaxiality

Fracture of Titanium Alloys at High Strain Rates and under Stress Triaxiality

Strain-Rate-Dependent Tensile Response of Ti–5Al–2.5Sn Alloy

Deformation Characteristics, Formability and Springback Control of Titanium Alloy Sheet at Room Temperature: A Review

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