A micro deep drawing of ARB processed aluminium foil AA1235

Hadi, Syamsul; Lü, Cheng; Zhu, Hong Tao

doi:10.1504/ijmpt.2013.058973

Cited by 9 publications

(12 citation statements)

References 19 publications

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“… and 2 in ref. . Other simplifications were a too small punch diameter d p (100 * g / d p ), above 18 in ref.…”

Section: Discussionmentioning

confidence: 99%

“…For instance, circular blanks obtained from copper bars processed by conventional equal channel angular pressing (ECAP) were deep‐drawn, and the results demonstrated that the formability of thick UFG disks in biaxial stretching is comparable to the CG material . It has also been proved that a higher limiting drawing ratio (LDR) can be achieved for an ARB‐processed aluminum AA1235 sheet than for its CG counterpart . Since metal‐forming operations can be performed in different complex stress states, these may make it possible to achieve good forming performance even in materials whose ductile properties in the uniaxial strain state are limited, such as UFG metallic materials, but this needs to be carefully investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the microstructural homogeneity of a sheet metal affects its forming abilities, because local defects such as inclusions, texture, and thickness variation can have an impact, leading, for example, to excessive thinning or even fracture . Accordingly, some reports indicated that grain refinement together with a homogenization of the microstructure can be beneficial in terms of sheet‐forming abilities . Additionally, surface roughness plays an important role, affecting the quality of the final product.…”

Section: Introductionmentioning

confidence: 99%

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Forming Ability of Ultrafine‐Grained Aluminum Plates Processed by Incremental Equal Channel Angular Pressing

et al. 2019

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Recently, post-severe plastic deformation (SPD) shaping processes have attracted attention because of the limited amount of data available on this topic. Herein, the formability of commercially pure aluminum plates with an ultrafinegrained microstructure processed by incremental equal channel angular pressing (I-ECAP) up to eight passes is discussed. The formability is evaluated experimentally using a cup-forming operation followed by modeling using finite element method (FEM). The drawn cups made of ultrafine-grained aluminum exhibit a smooth surface and show no signs of planar anisotropy (no earing). It is thus demonstrated that I-ECAP processing is successful in terms of reducing the anisotropy and may be an attractive process for obtaining a material suitable for forming sheet metal.

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“… and 2 in ref. . Other simplifications were a too small punch diameter d p (100 * g / d p ), above 18 in ref.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Forming Ability of Ultrafine‐Grained Aluminum Plates Processed by Incremental Equal Channel Angular Pressing

et al. 2019

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“…These materials are characterized by high ductility and low mechanical strength. Although a few authors have investigated the drawability of some special high-strength materials [Had13], these materials are generally difficult to obtain as thin foils with a thickness below 50 µm because cold rolling of high-strength materials is very limited due to strain hardening, which requires a series of multiple cold rolling and annealing processes in order to restore the ductility of these materials after each cold rolling process. Physical vapor deposition (PVD) and particularly magnetron sputtering have been proposed as an alternative process to produce thin foils of high-strength alloys [Sto10].…”

Section: Introductionmentioning

confidence: 99%

Materials for Micro Forming

Zoch

Schulz

Cui

et al. 2019

Lecture Notes in Production Engineering

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In micro cold forming, the tools are loaded differently in various functional areas, and tailored material properties are therefore required. To meet this requirement, different tool steels can be applied in the specific regions of the tools, with a gradual material transition in between to ensure a good bonding. These kinds of composite material can be produced via two newly developed material manufacturing processes: co-spray forming and successive spray forming. The spray-formed materials have been hot formed to eliminate porosity and break up the carbide network. Moreover, a selective heat treatment based on middle frequency induction heating has been developed to simultaneously austenitize the tool steels at different temperatures since the different steels may require different heat treatment conditions. Finally, micro rotary swaging tools made of graded tool steels have been precisely machined in hardened condition due to the fine and homogeneous microstructure in the steels. The tools have been successfully applied to form wires of AISI 304 stainless steel.

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“…Therefore, a considerable research effort is made to improve the efficiency and reliability of micro deep drawing and of other micro forming processes [3]. Foil materials employed in micro deep drawing process are quite restricted to a few types of highly available cold rolled foil strips such as pure copper, pure aluminum or austenitic stainless steel [4] although studies were conducted to investigate the drawability of other special materials [5,6].…”

Section: Introductionmentioning

confidence: 99%

Tensile properties and drawability of thin bimetallic aluminum-scandium-zirconium / stainless steel foils and monometallic Al-Sc-Zr fabricated by magnetron sputtering

et al. 2018

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Al-Sc-Zr alloys are interesting for the production of high strength micro components by micro deep drawing. These alloys show a good hardenability due to the formation of nanometer-scale spheroidal Al3(Sc, Zr) precipitates, which are highly coherent with the aluminum matrix. However, the formation of these precipitates in Al-Sc-Zr foils fabricated by conventional metallurgical methods dramatically reduces their ductility and drawability. In this work, magnetron sputtering was used to produce Al-Sc-Zr foils and Al-Sc-Zr / stainless steel bimetallic foils which are nearly free of these precipitates. Tensile tests were carried out to measure and compare the mechanical properties of monometallic Al-Sc-Zr foils and bimetallic Al-Sc-Zr / stainless steel foils deposited with varying plasma target powers and containing different volume fractions (layer thickness) of Al-Sc-Zr. Micro deep drawing was used to determine the drawability of selected monometallic and bimetallic foils. The results show that the density of monometallic Al-Sc-Zr foils can be improved significantly by increasing the DC target power and by using the high power impulse magnetron sputtering (HiPIMS) technology, resulting in foils with higher ductility. Bimetallic foils achieved higher strength and ductility than monometallic Al-Sc-Zr foils. Their mechanical properties vary with the target power and the volume fraction (thickness) of Al-Sc-Zr. The limit drawing ratio of HiPIMS deposited monometallic foil was 1.7 or 1.8 depending on the side of the foil facing the die, whereas a limit drawing ratio of 1.9 was observed for bimetallic foils.

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A micro deep drawing of ARB processed aluminium foil AA1235

Cited by 9 publications

References 19 publications

Forming Ability of Ultrafine‐Grained Aluminum Plates Processed by Incremental Equal Channel Angular Pressing

Forming Ability of Ultrafine‐Grained Aluminum Plates Processed by Incremental Equal Channel Angular Pressing

Materials for Micro Forming

Tensile properties and drawability of thin bimetallic aluminum-scandium-zirconium / stainless steel foils and monometallic Al-Sc-Zr fabricated by magnetron sputtering

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