Characterization of Sheared Edges in Warm Blanking of Magnesium Alloy AZ31B

Fazily, Piemaan; Yu, Jae-Hyeong; Lee, Chang-Whan

doi:10.3390/ma12071023

Cited by 13 publications

(8 citation statements)

References 23 publications

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“…The rollover amounts increase with the increase in the clearance value in all punch types. The results of other researchers in the literature also support this situation [8,9,15] Fig. 3.…”

Section: Resultssupporting

confidence: 74%

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An Investigation of Punch Radius and Clearance Effects on the Sheet Metal Blanking Process

Çavuşoğlu

2022

International Journal of Automotive Science and Technology

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In this study, the effects of punch edge radius and blanking clearance on product quality and blanking process in blanking of AISI 304 stainless steel sheet were investigated by using the fi-nite element analysis method. The blanking analyzes were performed at four different punch tip radii (0.01, 0.25, 0.5, 1 mm) and three different blanking clearance (1 %, 5%, 10%). As a result of the analysis, rollover, burr length increased, smooth sheared / fractured surface ratio and blanking force decreased with the increase in blanking clearance. Depending on the increase in the amount of punch tip radius, the blanking force, and burr length also increased, and the smooth sheared / fractured surface ratio decreased compared to the blanking process with flat punches.

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“…The rollover amounts increase with the increase in the clearance value in all punch types. The results of other researchers in the literature also support this situation [8,9,15] Fig. 3.…”

Section: Resultssupporting

confidence: 74%

“…With the increase in the clearance, the roll over depth increased, the burnish zone decreased, and the fracture zone increased. [15]. According to Sahli et al, the effects of the clearance on the product when blanking 16MnCr5 material were investigated by experimental and finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Punch Radius and Clearance Effects on the Sheet Metal Blanking Process

Çavuşoğlu

2022

International Journal of Automotive Science and Technology

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“…The blanking of magnesium alloy sheets at room temperature results in sheared edge defects such as microcracks, loose particles, and a jagged-plus-curved fracture profile. However, such deformities can be suppressed by a rise in temperature (Fazily et al, 2019). The fracture zone becomes comparably more consistent at high temperatures.…”

Section: Introductionmentioning

confidence: 95%

The Experimental Investigation of Punching of the AM60 and AZ61 Magnesium Alloy Sheets by Using Varied Punch Shapes

Çuğ

Khalifa²,

Gürün

2021

JER is an international, peer-reviewed journal that publishes f

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The using of magnesium alloys for industrial sheet metal part production has become increasingly common in recent years. This research aims to characterize the effects of the cutting-edge shapes of the punches on the blanking forces and the sheared edge qualities in the blanking/piercing operations of magnesium alloy sheets. Magnesium sheets (AM60 and AZ61) were produced by casting and rolling processes. AM60 and AZ61 Mg alloys produced by casting were rolled by using two different speeds, 2.5 m/min and 7.5 m/min. Material thickness was adjusted to three mm in the rolling process. Blanking tests were carried out on a die-set and hydraulic press by varying shaped punches. In the experimental studies, flat-ended, concave shaped, and 16° angled punches were used. A loadcell was fixed to the experimental setup to determine the blanking forces. The results showed that the AM60 alloy was more resistant to shearing than the AZ61. The lowest blanking force was obtained by use of the 16° angled punch. It was determined that the using of flat-ended punches for blanking operations was more convenient according to the usage purpose of the parts while all three punches can be used for piercing operations.

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“…Consequently, the burr height and rollover are reduced, whereas the shear zone ratio of the blanked edge is improved. Moreover, Wang et al [ 6 ] and Fazily et al [ 7 ] used optical microscopy (OM) and scanning electron microscopy (SEM) to analyze the characteristic size, fracture morphology, and strength of the shear edges, and investigated the surface microhardness of the shear zone (SZ) and shear-affected zone (SAZ) using Vickers hardness test.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Blanked Surface of C5191 Phosphor Bronze Sheet over a Wide Range of Blanking Speeds

et al. 2020

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The influence of blanking speed on the blanked surface quality of C5191 bronze phosphorus sheets, with a thickness of 0.12 mm, was systematically studied to demonstrate the mechanism under high speed blanking. The morphology and microstructure of the blanked edge were observed by using a variety of techniques, including optical microscopy (OM), scanning electron microscope (SEM), electron backscatter diffraction (EBSD), and transmission electron microscope (TEM). The results revealed that the local temperature and microhardness of the shear zone increased with the increase in blanking speed. Moreover, the quality of blanked edge significantly improved with the increase in blanking speed due to the combined influence of strain rate hardening and thermal softening. In addition, the blanked edge grains were elongated along the blanking direction and formed dislocation cells and sub-grains in some areas. The blanked edge is dominated by {000} <100> cubic texture at higher blanking speeds, and {112} <111> texture at lower blanking speeds. When punched at an ultra-high speed of 3000 strokes per minute (SPM 3000), the local area of the blanked edge exhibited distinct microstructural features, including low dislocation density, nanocrystals with high-angle grain boundaries, and significant differences in grain orientation. Additionally, the selected area electron diffraction (SAED) pattern exhibited a discontinuous ring-like structure, indicating the occurrence of adiabatic shearing with dynamic recrystallization.

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Characterization of Sheared Edges in Warm Blanking of Magnesium Alloy AZ31B

Cited by 13 publications

References 23 publications

An Investigation of Punch Radius and Clearance Effects on the Sheet Metal Blanking Process

An Investigation of Punch Radius and Clearance Effects on the Sheet Metal Blanking Process

The Experimental Investigation of Punching of the AM60 and AZ61 Magnesium Alloy Sheets by Using Varied Punch Shapes

Experimental Investigation of the Blanked Surface of C5191 Phosphor Bronze Sheet over a Wide Range of Blanking Speeds

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