Experimental Study on Effects of Process Parameters on Superplastic Deformation Ability of 7075 Aluminium Alloy Using Taguchi Method

Tien, Nguyen Manh; An, Nguyen Truong; Hoan, Tran Duc; Giang, Lai Dang; Tan, Le

doi:10.1007/978-3-030-37497-6_38

Cited by 1 publication

(4 citation statements)

References 6 publications

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“…As shown in Table 1, the limits of variables are denoted as -1, 0, and +1 for the lower value, middle value, and higher value, and the input variables are denoted as A for forming pressure (MPa), B for deformation temperature (°C), and C for forming time (min). The parameter ranges are determined based on the references [7,11,24]. Consequently, the optimizing issue is to find the minimum thinning degree based on the optimization process parameters [25].…”

Section: Fig 1 Schematic Diagram Of the Sheet Spf Processmentioning

confidence: 99%

“…Therefore, it reduces the deformation rate and deformation degree of the specimens. The degree of thickness distribution becomes uneven, the thinning degree at the dangerous position will increase [7,11,24].…”

Section: Effect Of Process Parameters On Thinning Degree εmentioning

confidence: 99%

“…This phenomenon can be explained as follows. When the strain rate is high, the time is not enough for the corresponding diffusion process to create the planes favorable for sliding, so the stress increases and the deformation degree of the specimen decreases [24].…”

Section: Effect Of Process Parameters On Thinning Degree εmentioning

confidence: 99%

“…However, when the forming pressure and strain temperature increase to a certain value, the relative height of the product tends to decrease. Because of this, the higher strain rate and high temperature will make the grain microstructure of the material grow, reducing the possibility of deformation [24]. The forming time increases (from 20 to 40 min), and the relative height of the product increases accordingly.…”

Section: Effect Of Process Parameters On the Relative Height Of Product H*mentioning

confidence: 99%

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Optimization of Superplastic Forming Process of AA7075 Alloy for the Best Wall Thickness Distribution

Nguyen

Tran

et al. 2021

Adv. technol. innov.

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This work aims to optimize the process parameters for improving the wall thickness distribution of the sheet superplastic forming process of AA7075 alloy. The considered factors include forming pressure p (MPa), deformation temperature T (°C), and forming time t (minutes), while the responses are the thinning degree of the wall thickness ε (%) and the relative height of the product h*. First, a series of experiments are conducted in conjunction with response surface method (RSM) to render the relationship between inputs and outputs. Subsequently, an analysis of variance (ANOVA) is conducted to verify the response significance and parameter effects. Finally, a numerical optimization algorithm is used to determine the best forming conditions. The results indicate that the thinning degree of 13.121% is achieved at the forming pressure of 0.7 MPa, the deformation temperature of 500°C, and the forming time of 31 minutes.

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Section: Fig 1 Schematic Diagram Of the Sheet Spf Processmentioning

confidence: 99%

Section: Effect Of Process Parameters On Thinning Degree εmentioning

confidence: 99%

Section: Effect Of Process Parameters On Thinning Degree εmentioning

confidence: 99%

Section: Effect Of Process Parameters On the Relative Height Of Product H*mentioning

confidence: 99%

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