Experimental characterisation of mechanical behaviour for a TA2 welded joint using digital image correlation

Sun, Peng-Yan; Zhu, Zhikang; Su, Chuan-Yi; Lü, Linnü; Zhou, Changyu; He, Xin

doi:10.1016/j.optlaseng.2018.11.022

Cited by 19 publications

(10 citation statements)

References 26 publications

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“…The digital image correlation technique provides more details about welded specimen behavior during the tensile test [ 42 , 43 ]. The obtained strain maps resulting from the DIC measurement for five points marked on the curve ( Figure 7 ) are presented in Figure 8 .…”

Section: Resultsmentioning

confidence: 99%

Research on the Properties and Low Cycle Fatigue of Sc-Modified AA2519-T62 FSW Joint

et al. 2020

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The aim of this research was to examine the mechanical and fatigue properties of friction stir welded Sc-modified 5 mm thick AA2519-T62 extrusion. The joint was obtained using the following parameters: 800 rpm tool rotation speed, 100 mm/min tool traverse speed, 17 kN axial, and MX Triflute as a tool. The investigation has involved microstructure observations, microhardness distribution analysis, tensile test with digital image correlation technique, observations of the fracture surface, measurements of residual stresses, low cycle fatigue testing, and fractography. It was stated that the obtained weld is defect-free and has joint efficiency of 83%. The failure in the tensile test occurred at the boundary of the thermo-mechanically affected zone and stir zone on the advancing side of the weld. The residual stress measurements have revealed that the highest values of longitudinal stress are localized at the distance of 10 mm from the joint line with their values of 124 MPa (the retreating side) and 159 MPa (the advancing side). The results of low cycle fatigue testing have allowed establishing of the values of the cyclic strength coefficient (k′ = 504.37 MPa) and cyclic strain hardening exponent (n′ = 0.0068) as well as the factors of the Manson–Coffin–Basquin equation: the fatigue strength coefficient σ′f = 462.4 MPa, the fatigue strength exponent b = −0.066, the fatigue ductility coefficient ε′f = 0.4212, and the fatigue ductility exponent c = −0.911.

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Section: Resultsmentioning

confidence: 99%

Research on the Properties and Low Cycle Fatigue of Sc-Modified AA2519-T62 FSW Joint

et al. 2020

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“…The Gaussian prefiltering method is used to reduce the deviation error of the displacement measurement. Then, a set of filtered images is analyzed by affine shape function and bicubic spline interpolation [24]. The full-field strain distribution is determined by the MTI noncontact strain measurement system, based on the DIC technique ( Figure 14).…”

Section: Methodsmentioning

confidence: 99%

“…The Gaussian prefiltering method is used to reduce the deviation error of the displacement measurement. Then, a set of filtered images is analyzed by affine shape function and bicubic spline interpolation [24]. The biaxial tensile testing of sheet TA2 was carried out on an in situ biaxial testing machine (IPBF-5000, CARE Measurement & Control Co., Ltd, Tianjin, China), and the load-controlling mode was employed during the loading process.…”

Section: Methodsmentioning

confidence: 99%

Optimal Design of a Miniaturized Cruciform Specimen for Biaxial Testing of TA2 Alloys

Zhu

Zhang

et al. 2019

Metals

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The biaxial tensile testing of cruciform specimens is an effective way to create complex loading, and is a feasible experimental method for studying the subsequent yield behavior. However, relevant knowledge gaps still exist in the geometric design of miniaturized cruciform specimens which are applicable to test machines with maximum load less than 5000 N. The present work outlines the systematic investigations of the optimal design of the miniaturized cruciform specimen of a commercial pure titanium TA2 for biaxial tensile testing. Finite element modeling (FEM) coupled with the orthogonal design is employed to explore the influence of various geometric parameters, i.e., the thickness of the central gauge region, the width, the length, and the number of the slit, and the radius of the inner chamfer, on the stress distribution of the central gauge region. The optimal geometric design of the miniaturized cruciform specimen is successfully obtained, simultaneously considering the stress uniformity in the central gauge region and economic factors. The full-field strain distributions are also determined via the digital image correction (DIC) technique, which confirm the accuracy of the results achieved from FEM. This work provides a complete and reliable procedure for optimizing the geometry of miniaturized cruciform specimens, whose application can be expanded to other metals in the future.

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“…Peng-Yan Sun et al [ 10 ] used digital image correlation (DIC) method for Ti based welded joints. The strain distribution was found to be heterogenous and the deformation on both sides of the weld centerline was found to be symmetrical.…”

Section: Introductionmentioning

confidence: 99%

Digital Image Correlation of Tensile Properties for Monel 400/SS 316L Dissimilar Metal Welding Joints

et al. 2021

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Dissimilar metal weld joints of Monel 400 and Stainless Steel 316L stainless steel were carried out using Gas Tungsten Arc Welding (GTAW). Conventional annealing and cryogenic treatment were performed on the welded joints. Weld joints of this combination of materials have enormous potential applications in power industry and the available related literature is limited. In the present study, the tensile properties of heat treated (HT), cryotreated (CT), and untreated (UT) specimens were studied. The engineering stress and strain were determined experimentally as per Standard Test Methods for Tension Testing of Metallic Materials (ASTM E8). The strain distribution was evaluated at different zones of weld joint was evaluated using Digital Image Correlation (DIC). Significant difference was noticed between the zones. Weld zone of all samples had less local stress and strain and SS 316L heat affected zone (HAZ) zone had more local stress and strain when compared to other zones. The local strain distribution along distance from weld center line and local stress-strain curves of different zones are also predicted. Scanning Electron Microscopy was used to analyze the fracture behavior of welded samples for HT, CT, and UT specimens.

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Experimental characterisation of mechanical behaviour for a TA2 welded joint using digital image correlation

Cited by 19 publications

References 26 publications

Research on the Properties and Low Cycle Fatigue of Sc-Modified AA2519-T62 FSW Joint

Research on the Properties and Low Cycle Fatigue of Sc-Modified AA2519-T62 FSW Joint

Optimal Design of a Miniaturized Cruciform Specimen for Biaxial Testing of TA2 Alloys

Digital Image Correlation of Tensile Properties for Monel 400/SS 316L Dissimilar Metal Welding Joints

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