Influence of temperature on alloy Ti6Al4V formability during the warm SPIF process

Naranjo, Jesús Andrés; Miguel, V.; Martínez, Alberto; Coello, J.; Manjabacas, M.C.; Valera, Juan Luis Callejas

doi:10.1016/j.proeng.2017.10.843

Cited by 14 publications

(9 citation statements)

References 19 publications

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“…Some authors are developing specific methods for determining the material behavior model further than the UTS point, as photographic techniques to determine the real section of the tensile test specimen [38] or reverse engineering methodologies [39,40]. In previous works [41,42], the authors of the present paper have proven that the Swift model is adequate to explain the plastic behavior of the Ti6Al4V alloy for the SPIF process and they have also evaluated the forces needed to that.…”

Section: Introductionmentioning

confidence: 84%

Evaluation of the Formability and Dimensional Accuracy Improvement of Ti6Al4V in Warm SPIF Processes

Naranjo

Miguel

Martínez

et al. 2019

Metals

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Single Point Incremental Forming (SPIF) has great potential as it can be easily implemented and the forming process does not require the use of dies. However, its application to high performance alloys such as Ti6Al4V has not been resolved due to its characteristic low formability. In the literature, studies on the warm SPIF process applied to this alloy report improved formability. However, in some of these studies the procedures used are complex and in others the surface finishes obtained are unsatisfactory. The present study proposes a methodology consisting of a simple heating device which permits working at moderate temperatures and quantifies the benefit of the temperature on the alloy formability, the forces acting during the process, and finally the dimensional precision of the parts produced. Working temperatures in the range of 300–400 °C significantly reduce forces, increase formability of the alloy, and substantially reduce springback. However, the springback values suggest the need for dimensional compensation at the design stage of products.

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Section: Introductionmentioning

confidence: 84%

Evaluation of the Formability and Dimensional Accuracy Improvement of Ti6Al4V in Warm SPIF Processes

Naranjo

Miguel

Martínez

et al. 2019

Metals

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“…It was found that numerical modeling of ISF of denture base by using Ti-6Al-4Vsheets is a feasible solution and it clearly shows the potential for real medical application. Naranjo et al [ 157 ] presented results of the SPIF of Ti-6Al-4V conical drawpieces at different temperatures. Ansys Workbench was used as the numerical program.…”

Section: Numerical Modelingmentioning

confidence: 99%

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

et al. 2021

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Incremental sheet forming of titanium and its alloys has a significant role in modern manufacturing techniques because it allows for the production of high-quality products with complex shapes at low production costs. Stamping processes are a major contributor to plastic working techniques in industries such as automotive, aerospace and medicine. This article reviews the development of the single-point incremental forming (SPIF) technique in titanium and its alloys. Problems of a tribological and microstructural nature that make it difficult to obtain components with the desired geometric and shape accuracy are discussed. Great emphasis is placed on current trends in SPIF of difficult-to-form α-, α + β- and β-type titanium alloys. Potential uses of SPIF for forming products in various industries are also indicated, with a particular focus on medical applications. The conclusions of the review provide a structured guideline for scientists and practitioners working on incremental forming of titanium and titanium alloy sheets. One of the ways to increase the formability and minimize the springback of titanium alloys is to treat them at elevated temperatures. The main approaches developed for introducing temperature into a workpiece are friction heating, electrical heating and laser heating. The selection of an appropriate lubricant is a key aspect of the forming process of titanium and its alloys, which exhibit unfavorable tribological properties such as high adhesion and a tendency to adhesive wear. A review of the literature showed that there are insufficient investigations into the synergistic effect of rotational speed and tool rotation direction on the surface roughness of workpieces.

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“…Less stress occurs during the forming process by the effect of heat. Stress reduction also has a positive effect on sheet thickness [9].…”

Section: Introductionmentioning

confidence: 95%

Incremental Forming of Titanium Grade 2 Sheet by TPIF-RL Method

Seçgin¹,

Nart²,

Özsert³

2021

International Journal of Automotive Science and Technology

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TPIF-RL method is a new method that gives better wall thickness in incremental forming. In this method, the sheet is not fixed at the edges. Like the deep drawing process, it is compressed with a certain pressure. During the forming process, the sheet flows under the blankholder. Thus, more homogenous wall thickness is ob-tained.In this study, Titanium Grade 2 sheet is formed as a cone via TPIF-RL method. Optimum forming parameters were determined by Signal/Noise analysis. In addi-tion, finite element analysis of the process was performed. Using 2 bar clamping pressure, 1000 mm/min feedrate, 0.75 mm increment and 15 mm forming tool di-ameter optimum result was obtained. With these optimum parameters, 6% thin-ning occurs on sheet thickness. This new method ensures a homogeneous wall thickness distribution.

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Influence of temperature on alloy Ti6Al4V formability during the warm SPIF process

Cited by 14 publications

References 19 publications

Evaluation of the Formability and Dimensional Accuracy Improvement of Ti6Al4V in Warm SPIF Processes

Evaluation of the Formability and Dimensional Accuracy Improvement of Ti6Al4V in Warm SPIF Processes

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

Incremental Forming of Titanium Grade 2 Sheet by TPIF-RL Method

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