A study on the micro-formability of Al 5083 superplastic alloy using micro-forging method

Kang, Seung‐Goo; Na, Y.S.; Park, K.Y.; Jeon, Jae-Hyun; Son, Seon-Cheon; Lee, J.H.

doi:10.1016/j.msea.2006.01.166

Cited by 32 publications

(16 citation statements)

References 6 publications

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“…As such, the grain size is believed to be a limiting factor on the minimum size of the geometrical features that can be produced by micro-forming [15]. Obviously, HPT-processed Al-1% Mg has much finer grain size (∼ 230 nm) than Al in ECAP processing (∼ 1.3 m).…”

Section: Discussionmentioning

confidence: 99%

“…There is only limited research on the application of SPD processed materials in micro-forming [6,[15][16][17][18]. Therefore, experiments were conducted to investigate HPT processing of an Al-1% Mg alloy and to develop a processing route to improve the material ductility after SPD processing in order to attain a material suitable for micro-forming applications.…”

Section: Introductionmentioning

confidence: 99%

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Developing ultrafine-grained materials with high strength and good ductility for micro-forming applications

Huang

Langdon

2015

MATEC Web of Conferences

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Abstract. Materials with ultrafine grain sizes are attractive for use in micro-forming operations. High-pressure torsion (HPT) is an effective technique that allows disc materials subjected to torsional deformation to generate microstructures with significant grain refinement. Generally, ultrafine-grained materials exhibit high strength but their ductility is limited because they have both a low rate of strain hardening and a low strain rate sensitivity. A special processing route by utilizing HPT and short term annealing at different temperatures was developed to obtain balanced high strength and good ductility in an ultrafine-grained Al-1% Mg alloy which will increase the production rate and quality in micro-forming.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Developing ultrafine-grained materials with high strength and good ductility for micro-forming applications

Huang

Langdon

2015

MATEC Web of Conferences

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“…Forcellese and Gabrielli 16 proposed a new warmforging sequence and solution heat treatment to improve the mechanical properties of aluminium alloy AA6082. Narayanasamy et al 17 carried out extrusion forging with aluminium alloy in cold-forming conditions, and Kang et al 18 demonstrated microforming tests with aluminium alloy 5083. Puertas et al 19 introduced the manufacture of Francis turbine blades with aluminium alloy AA1050 the microstructure of which is enhanced by combining equal channel angular extrusion and equal channel angular processing.…”

Section: Introductionmentioning

confidence: 99%

Warm forging of an aluminium alloy for the differential case in an automobile transmission

Lee

Kim

Lee

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper presents a warm-forging process for the manufacture of an aluminium alloy differential case in an automobile, which has usually been produced from ductile cast iron. In order to replace the conventional ductile cast iron with a lightweight material in the differential case, aluminium alloy 6082 is utilized in the proposed warm-forging process, which is then analysed by numerical simulations using DEFORM-3D. Experimental warm forging using aluminium alloy 6082 was conducted in a 1600 tonf press shop to evaluate the proposed design in the die and the punch as well as the forgeability of the aluminium alloy differential case. The as-forged aluminium alloy differential case not only provides a net shape but also has a crack-free volume internally, while reducing the total weight by about 40% based on the proposed design.

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“…Determination of the flow behavior for 3Cr20Ni10W2 alloy at hot deformation condition has a great practical importance, since forming processes such as electric upsetting and forging are often applied for metals manufacture 2,3 , and process variables including deformation degree, strain rate and forming temperature have a significant influence on flow behavior which are represented by constitutive equations 4 . Moreover, the constitutive relation is often used to describe the plastic flow properties of the metals and alloys in a form that can be used in computer code to perform the numerical simulations of forging response under the prevailing loading conditions 5,6 . In order to establish the optimum processing variables and realize numerical simulation of forging, it is necessary to investigate the constitutive relationships under hot deformation conditions.…”

Section: Introductionmentioning

confidence: 99%

The flow behavior modeling of as-extruded 3Cr20Ni10W2 austenitic heat-resistant alloy at elevated temperatures considering the effect of strain

Quan

Mao

et al. 2014

Mat. Res.

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In order to investigate the compressive deformation behavior of 3Cr20Ni10W2 alloy, a series of isothermal upsetting experiments were carried out in the temperature range of 1203-1403 K and strain rate range of 0.01-10 s -1 on a Gleeble-1500 thermo-mechanical simulator. The results indicate that the flow stress initially increases to a peak value and then decreases gradually to a steady state. The characteristics of the curves are determined by the interaction of work hardening (WH), dynamic recovery (DRV) and dynamic recrystallization (DRX). The flow stress decreases with increasing temperature and decreasing strain rate. The relationship between microstructure and processing parameters is discussed to give an insight into the hot deformation behavior of 3Cr20Ni10W2 alloy. Then, by regression analysis for constitutive equation, material constants (n, α, β, A and Q) were calculated for the peak stress. Further, the constitutive equation along the flow curve was developed by utilizing an eighth order polynomial of strain for variable coefficients (including n, α, Α and Q). The validity of the developed constitutive equation incorporating the influence of strain was verified through comparing the experimental and predicted data by using standard statistical parameters such as correlation coefficient (R) and average absolute relative error (AARE) that are 0.995 and 4.08% respectively.

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A study on the micro-formability of Al 5083 superplastic alloy using micro-forging method

Cited by 32 publications

References 6 publications

Developing ultrafine-grained materials with high strength and good ductility for micro-forming applications

Developing ultrafine-grained materials with high strength and good ductility for micro-forming applications

Warm forging of an aluminium alloy for the differential case in an automobile transmission

The flow behavior modeling of as-extruded 3Cr20Ni10W2 austenitic heat-resistant alloy at elevated temperatures considering the effect of strain

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