Superplastic forming of advanced metallic materials

Giuliano, Gillo

doi:10.1533/9780857092779

Cited by 69 publications

(58 citation statements)

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“…The maximum elongation was obtained at the strain rate of 10 -3 s-1 and 1123 K. After determining superplastic characteristics of this alloy, the forming profile was prepared from a finite element analysis(FEM) with MARC(MSC Software Corp.). The schematic shape of the toroidal tank for ramjet engine in subscale is show in Figure 2 with design drawing of toroidal tank [4]. The outer diameter is 150mm and inner diameter is 90mm in quarter subscale.…”

Section: Titanium Toroidal Tankmentioning

confidence: 99%

“…The higher the value of the strain rate sensitivity the more superplastic the alloy. The adoption of superplastic characteristics into manufacturing process provides significant advantage to make many of spacecraft components lighter and stiffer [4]. In superplastic forming(SPF) process of sheet metals, one or more sheets of superplastic grade materials are heated and forced onto or into single surface tools by air pressure.…”

Section: Introductionmentioning

confidence: 99%

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Integrated Manufacturing of Aerospace Components by Superplastic Forming Technology

Min

Lee

2015

MATEC Web of Conferences

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Abstract. Aerospace vehicle requires lightweight structures to obtain weight saving and fuel efficiency. It is known that superplastic characteristics of some materials provide significant opportunity for forming complicated, lightweight components of aerospace structure. One of the most important advantages of using superplastic forming process is its simplicity to form integral parts and economy in tooling [1]. For instance, it can be applied to blow-forming, in which a metal sheet is deformed due to the pressure difference of hydrostatic gas on both sides of the sheet. Since the loading medium is gas pressure difference, this forming is different from conventional sheet metal forming technique in that this is stress-controlled rather than strain and strain rate controlled. This method is especially advantageous when several sheet metals are formed into complex shapes. In this study, it is demonstrated that superplastic forming process with titanium and steel alloy can be applied to manufacturing lightweight integral structures of aerospace structural parts and rocket propulsion components. The result shows that the technology to design and develop the forming process of superplastic forming can be applied for near net shape forming of a complex contour of a thrust chamber and a toroidal fuel tank.

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Section: Titanium Toroidal Tankmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated Manufacturing of Aerospace Components by Superplastic Forming Technology

Min

Lee

2015

MATEC Web of Conferences

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“…• C to 550 • C. At these temperature and at very low strain rates (usually below 5 × 10 −2 s −1 ) the material has a very large strain sensitivity index and an extraordinary elongation to failure can be reached without excessive localized thinning [1]. To achieve this kind of behaviour a controlled microstructure is requested for migrograin superplasticity (the most common type of superplasticity).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the strain behaviour of a friction stir processed superplastic aluminium alloy

Sorgente

Campanelli

Stecchi

et al. 2015

MATEC Web of Conferences

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Abstract. Superplastic forming is a well-established process by which very large, very complex shaped and also multi-sheets components can be manufactured in a single step. Combining this process with a suitable joining technique is of great industrial interest. In this work the strain behaviour of a friction stir processed aluminium alloy was investigated through free inflation tests. Principal parameters of the friction stir process were changed and free inflation tests were performed to assess the formability of the processed sheet. A strong influence of the friction stir process parameters was recorded on the formability of the processed material. Only a specified set of parameters assured a strain behaviour close to the one of the base material.

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“…Figura 2.20 -Variáveis e geometria do domo nas duas direções do raio (Giuliano, 2011 Figura 3.14 -Geometria do modelo analisado (Toloczko et al, 2014 Figura 4.12 -Gráficos representativos da taxa de deformação ótima (Padmanabhan et al, 2001 …”

Section: Lista De Ilustraçõesunclassified

“…Neste contexto é possível destacar a conformação superplástica (CSP), a técnica consiste em um processo avançado para a deformação de chapas, onde o principal objetivo é obter formas complexas, e assim reduzir o número de componentes de um projeto (GIULIANO;FRANCHITTI, 2007;DESHMUKH, 2009 (SAGRADI, 1996).…”

Section: Introductionunclassified

Análise do comportamento mecânico de ligas metálicas submetidas ao processo superplástico em matriz multidomo.

Toloczko¹

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AgradecimentosAgradeço primeiramente a DEUS que sempre me guiou e iluminou, colocando as pessoas certas em meu caminho.A minha família que sempre me incentivou a acreditar em meus sonhos, em especial aos meus irmãos pelas constantes conversas e mensagens de apoio durante esta jornada.Ao Prof. Drº. Gilmar Ferreira Batalha pelos conhecimentos adquiridos, pelo profissionalismo como professor e orientador, e também pela motivação e força durante este trabalho. ABSTRACTThis study aims to evaluate the forming technique fluidostatic expansion (bulge forming) through a die with multiple cavities. Two AA5083 alloy and Pb-60Sn specification were submitted to superplasticity process (superplastic forming) for checking different working parameters and comparison with the results in numerical simulation. One of the main conclusions is that the multidomo method was valid to study the superplastic phenomenon. The tests were performed using the constant pressure method, where it was possible to obtain variables such as stress, strain rate and the strain rate sensitivity index. An important implication of this process is the correct control of working time with shaped cavities in separate trials.

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Superplastic forming of advanced metallic materials

Cited by 69 publications

References 0 publications

Integrated Manufacturing of Aerospace Components by Superplastic Forming Technology

Integrated Manufacturing of Aerospace Components by Superplastic Forming Technology

Analysis of the strain behaviour of a friction stir processed superplastic aluminium alloy

Análise do comportamento mecânico de ligas metálicas submetidas ao processo superplástico em matriz multidomo.

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