Determination of FLD for Ti-6Al-4V Titanium Alloy Sheet

Lacki, P.

doi:10.4028/www.scientific.net/kem.687.171

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Works in the field of numerical modeling of sheet metal forming processes, taking into account the effect of friction on the material flow [ 51 , 52 ], including the use of multi-layer artificial neural networks (ANNs) and backward elimination regression for the prediction of values of the CoF [ 53 ], are also carried out. A special role in numerical analysis is played by forming limit diagrams (FLDs), which make it possible to predict the behavior of the sheet during forming [ 54 , 55 ].…”

Section: Introductionmentioning

confidence: 99%

Tribological Aspects of Sheet Titanium Forming

et al. 2023

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Friction, wear, and lubrication are inherent to all metal-forming processes. Unfortunately, they are particularly troublesome when forming titanium materials, which tend to form titanium buildup on the working surfaces of the forming tools. Lubrication is one of the most effective ways to separate contacting surfaces and eliminate galling, thus reducing tool wear. The paper presents the tribological aspects of titanium sheets forming using environmentally friendly lubricants with the addition of boric acid. The lubricant’s effectiveness was assessed on the basis of technological tests, such as the strip drawing test, the Erichsen cupping test, and the formation of spherical drawn parts in industrial conditions. Moreover, the results of the numerical simulation of forming a titanium hat-shaped part are presented. Numerical calculations of forming processes were performed using the PamStamp 2G system based on the finite element method. Both experiments and numerical analyses showed the positive effect of lubricants with boric acid on sheet titanium forming.

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Section: Introductionmentioning

confidence: 99%

Tribological Aspects of Sheet Titanium Forming

et al. 2023

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“…An interest in the use of titanium in the civil engineering grows due to excellent corrosion resistance, low specific gravity, high strength and low thermal conductivity. Although the use of titanium is limited owing to high production costs and difficulties in its processing [9][10][11], it is likely that along with the development of new technologies [12][13][14][15][16][17] titanium use will increase.…”

Section: Introductionmentioning

confidence: 99%

Applications of Titanium Sheets in Modern Building Construction

Adamus

2014

AMR

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Titanium is most likely to play more important role in future civil applications. Its excellent properties such as: low density, high mechanical strength and good corrosion resistance give it some advantages and open the way for new applications both in modern technology and civil engineering. In many ways (e.g. specific strength, corrosion resistance) titanium, especially its alloys outstrip typical structural materials such as steel and aluminium alloys. The article discusses properties of titanium and its alloys, which are especially important in civil engineering applications due to their properties: low density, resistance to sea water and salty atmospheres of seashores, low coefficient of thermal expansion and excellent aesthetic qualities. Although the use of titanium in civil application is still limited it is expected that a demand for titanium building materials will steadily grow in the future. The characteristic titanium applications in the worldwide civil engineering are presented. It is highlighted that despite high cost of titanium relative to other materials, over a long span of 20 or more years titanium tends to be cheaper in terms of life-cycle costs. Furthermore, the article investigates the difficulties and opportunities associated with shaping titanium sheets. In the paper, some technological problems (e.g. low drawability, high susceptibility to galling and high spring-back) occurring in the sheet-titanium forming processes are discussed.

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Experimental and numerical investigation of the damage state of Ti-6Al-4V alloy sheet in the tensile test, hydraulic bulging, and hydroforming processes

Yapan,

Korkmaz,

Toros

et al. 2024

Int J Adv Manuf Technol

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There has not been any damage prediction using Johnson-Cook’s (JC) hardening and damage model in the hydraulic bulging (HB) and hydroforming (HF), which are the advanced manufacturing processes, of the Ti-6Al-4V (Ti64) alloy. In the presented study, the damage behavior of the Ti64 alloy sheet in the HB and HF processes was investigated both experimentally and numerically for the first time to address the existing research gap. In this context, firstly, tensile tests (TT) were carried out on samples with different stress triaxiality values at three different tensile speeds, and the fracture morphologies of the samples were examined to evaluate whether it was appropriate to use the JC hardening and damage model. Since the fracture surfaces generally exhibit a ductile fracture morphology and are affected by stress triaxiality and strain rate, it was determined that it would be appropriate to use the JC hardening model and damage criterion to predict the damage of the Ti64 alloy in finite element analysis (FEA). Then, JC model parameters were determined by fitting the stress-strain curve obtained from the FEA and experimental tensile tests. In the HB experiments, bulging height and thickness thinning were predicted by FEA with an accuracy of 97% and 96.85%, respectively. In the HF experiments, the experimental burst pressure, die inlet radius, and base radius were predicted correctly at a rate of 92.5%, 95.5%, and 97.8%, respectively. Also, the thickness of the sample showed good agreement with the FEA results. The fracture zones in each process exhibited good agreement with the experimental results. Thus, it has been demonstrated that the JC damage criterion can be successfully applied in FEA if the Ti64 titanium alloy is damaged in various processes.

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Determination of FLD for Ti-6Al-4V Titanium Alloy Sheet

Cited by 3 publications

References 16 publications

Tribological Aspects of Sheet Titanium Forming

Tribological Aspects of Sheet Titanium Forming

Applications of Titanium Sheets in Modern Building Construction

Experimental and numerical investigation of the damage state of Ti-6Al-4V alloy sheet in the tensile test, hydraulic bulging, and hydroforming processes

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