Experimental And Theoretical Determination Of Forming Limit Curve

Adamus, J.; Dyja, K.; Motyka, Maciej

doi:10.1515/amm-2015-0321

Cited by 6 publications

(6 citation statements)

References 24 publications

(27 reference statements)

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“…Figure 12 presents the results of strain assessment based on the comparison of the calculated strain values in the cups with the forming limit diagram of the Grade 2 titanium sheet. This FLD was determined experimentally according to the methodology described in [ 63 ]. FLDs are a graphical representation of major ε 1 and minor ε 2 limit strains of a given sheet, beyond which local thinning occurs.…”

Section: Resultsmentioning

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: Resultsmentioning

confidence: 99%

Tribological Aspects of Sheet Titanium Forming

et al. 2023

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“…The forming limit diagram (FLD) of a Grade 2 titanium sheet with thickness t = 1 mm, which is presented in Figure 5 , was determined experimentally according to the methodology described in [ 41 ].…”

Section: Methodsmentioning

confidence: 99%

Numerical and Experimental Analysis of Titanium Sheet Forming for Medical Instrument Parts

et al. 2022

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The paper analyses the forming of the surgical instrument handles made of Grade 2 titanium sheets. Sheet metal forming is a technology ensuring high strength and light weight of products. Replacing stainless steels with titanium further reduces instrument weight and additionally provides the required resistance to corrosive environments typical for surgeries. The low instrument weight is important to prevent fatigue of surgeons and allow them to maintain high operational accuracy during long term surgeries. The numerical analysis of the technological process was performed in order to adapt it to forming tool handles using titanium sheets instead of steel sheets. The numerical calculations were experimentally verified. It was found that, in the case of titanium handles, it is necessary to use a blank holder in the first forming operation to eliminate sheet wrinkling in the flange area. The shape and dimensional accuracy of the drawn part after trimming were high enough and the 4th forming operation became unnecessary. Moreover, the process modification included lubrication using rapeseed oil with the addition of boric acid, which effectively prevents the galling of titanium on the working surfaces of the steel tools and ensures a more uniform distribution of plastic strains in the drawn part.

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“…In the case of sculptures and components with complex spatial profiles, there arise aesthetic and technical problems, such as for example: the one related with the necessity of overcoming insufficient plasticity of titanium [11,12], which greatly impedes the implementation of convex fragments of sculptures, protection of the area of welded joints from contact with the air, due to which, gas saturation with metal air occurs, which leads to decrease in corrosion resistance, strength and plasticity of titanium [13,14]. These phenomena can occur during assembly of large components in the place of their setting.…”

Section: Somentioning

confidence: 99%