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superplastic forming

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
... forming, explosive forming, electromagnetic forming, and superplastic forming. auxiliary equipment blanking contour roll forming deep drawing die materials drop hammer forming electromagnetic forming explosive forming fine-edge blanking forming by multiple-slide machines forming machines...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005433
EISBN: 978-1-62708-196-2
... Abstract This article presents a mechanical description of superplasticity and discusses constitutive equations that are essential for simulating superplastic forming processes, applicable to structural superplasticity. It presents the phenomenological constitutive equations of superplasticity...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004010
EISBN: 978-1-62708-185-6
... schematic of a more sophisticated roll forming mill that can employ both axial and radial roll forming is shown in Fig. 3 . This hot roll forming mill was developed at the Institute for Metals Superplasticity Problems (IMSP), Ufa, Russia, to form axisymmetric and flanged shapes by localized, incremental...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005458
EISBN: 978-1-62708-196-2
... superplastic and hot forming processes. Grain-boundary cavitation, observed under temperature and strain-rate conditions for which the boundaries are weaker than the grain interiors, often results from grain-boundary sliding and the concentration of strain around nondeformable particles and hard second phases...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003181
EISBN: 978-1-62708-199-3
... to a fine-grain microstructure at the start of superplastic forming. In dynamic recrystallization, a deformed microstructure undergoes gradual, continuous recrystallization and grain refinement in the course of superplastic forming. Table 5 lists the nominal compositions of several superplastic...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004001
EISBN: 978-1-62708-185-6
... resistance and reduced flow stresses. These improvements are useful in secondary processes such as sheet rolling, superplastic forming of sheet, and isothermal, closed-die forging. Two major techniques for rolling of sheet have evolved from the early work on near-isothermal, hot pack rolling conducted by...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003971
EISBN: 978-1-62708-185-6
... can design and understanding of temperature transients have also enabled the hot pack rolling of gamma titanium-aluminide sheet and foil products used in subsequent superplastic-forming operations ( Fig. 3c ). A key to the success of each of these processes has been the development of a detailed...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.9781627081863
EISBN: 978-1-62708-186-3
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... tests, such as the tension test, ring compression test, plane-strain compression test, bend test, indentation test, and forgeability test. It concludes with information on the role of the finite-element modeling software used in workability analysis. bend test bulk forming processes cracking...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004020
EISBN: 978-1-62708-185-6
..., followed by the models of constitutive behavior. It provides a discussion on creep mechanisms involving dislocation and diffusional flow, such as the Nabarro-Herring creep and the Coble creep. The equations for the several creep rates are also presented. Research on the mechanism of the superplastic flow...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006282
EISBN: 978-1-62708-169-6
...) of solution-treated plus strained Ti-6Al-4V sheet and after subsequent aging. Fine grain metals are said to be superplastic when they exhibit both high elongation and high strain-rate sensitivities. These characteristics allow complex parts to be formed to near-net shape at substantial...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003164
EISBN: 978-1-62708-199-3
... Abstract Alloys based on ordered intermetallic compounds constitute a unique class of metallic material that form long-range ordered crystal structures below a critical temperature. Aluminides, a unique class of ordered intermetallic materials, possesses many attributes like low densities, high...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
... of one of the partners of the contact, the workpiece, is typical for metal forming. Contact pressures can range from 1 to a few MPa in sheet-forming processes to a few GPa in hard metal rolling or wire drawing. Speeds vary between a few μm/s (superplastic processing) to tens of m/s (high-speed...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003120
EISBN: 978-1-62708-199-3
... mechanical properties and chemical composition of nickel, iron, and cobalt-base superalloys in both the cast and wrought forms. chemical composition cobalt-base superalloys environmental factors high-temperature applications iron-base superalloys mechanical properties metal processing...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003129
EISBN: 978-1-62708-199-3
... of alloying elements and achieving a finer distribution of second-phase particles in an equiaxed grain structure. Such homogeneous, low-segregation, fine-scale alloy microstructures are useful for subsequent rolling, forging, extrusion, and superplastic forming operations. Alloys produced by spray...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004007
EISBN: 978-1-62708-185-6
... hydrostatic pressure includes the densification of porous powder metallurgy products where both cold isostatic pressing (CIP) and hot isostatic pressing (HIP) are utilized. In addition, many superplastic-forming operations conducted at intermediate to high homologous temperatures utilize a backpressure of the...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.9781627081757
EISBN: 978-1-62708-175-7
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009013
EISBN: 978-1-62708-185-6
... edge cracking during rolling operations, central bursting during extrusion, cavitation during superplastic forming of aluminum alloys, or even cracking of the tooling itself. In these instances, combining the use of damage criterion ( Ref 1 , 2 , 3 , 4 , 5 ) with process modeling generally allows...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004016
EISBN: 978-1-62708-185-6
... processed metals and alloys with submicrometer structures ( Ref 25 ). Although high diffusivity can reduce thermal stability of processed materials, it provides an increase in the ability for superplastic forming ( Ref 21 ). Also, enhanced diffusivity together with simple shear deformation mode has...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005409
EISBN: 978-1-62708-196-2
..., and fabricated into finished components via closed-die forging, superplastic forming, and so on ( Ref 3 , 4 ). The TMP of ingots of alpha/beta and near-alpha titanium alloys comprises a large amount of hot work in the beta-phase field, a small increment of hot work in the alpha+beta field...