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flow-formed materials

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500249
EISBN: 978-1-62708-317-1
... is given by the shape of the mandrel. Fig. 12.19 Machine setup for forward flow forming. Source: Ref 12.12 Flow forming has two types. Figure 12.19 shows the machine setup for forward flow forming. Here, the material flow is in the same direction as the axial feed of the forming tool...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400033
EISBN: 978-1-62708-316-4
... and use of forming limit curves and the extensive amount of information they provide. anisotropy flow stress formability forming limit curves plastic deformation sheet forming tensile test WHEN A MATERIAL is deformed, two types of deformation occur: elastic and plastic. The elastic phase...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040083
EISBN: 978-1-62708-300-3
... of the selected material test with given flow stress data. Compare the computed forming load with experimentally measured one. Obtain the amount of adjustments in material parameters by minimizing the difference between the computed and measured loads. Improve the material parameters until the difference...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400005
EISBN: 978-1-62708-316-4
... forming operation such as heat transfer or friction coefficients are difficult to define quantitatively. For a given material and shape, the surface transformations occurring in the plastic deformation zone are controlled by the equipment, tooling, and work piece/tool interface. The metal flow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040237
EISBN: 978-1-62708-300-3
... damage value is a material constant, several tests should be performed to obtain, for a given material, the flow stress and the critical damage value (CDV). Once the CDV for a specific material is obtained, it is possible to predict through FEM simulations the formation of cracks in forming operations...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260001
EISBN: 978-1-62708-336-2
... In metal forming, plasticity theory is applied to investigate the mechanics of plastic deformation. The investigation allows the analysis and prediction of the following: Metal flow, including velocities, strain rates, and strain Temperature and heat transfer Variation of local material...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390007
EISBN: 978-1-62708-459-8
..., by definition, the flow of metals, involving plastic (or permanent ) shape change by deforming (or forming ) the body without fracture or creating a new shape by removing excess material in a controlled manner ( machining ). The ability of a metal to undergo shape change without fracture is its ductility...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290009
EISBN: 978-1-62708-319-5
... flatten during milling to form flakes, while brittle materials fracture like glass, leaving sharp corners. Figure 2.9 is a scanning electron micrograph of a milled Fe-Cr-C compound, showing the characteristic angular particle shape created by random fracture events. Such angular asperities inhibit flow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400221
EISBN: 978-1-62708-316-4
... PRESSURE BULGE TESTS were conducted at The Ohio State University’s Center for Precision Forming (CPF), formerly Engineering Research Center for Net Shape Manufacturing (ERC/NSM), in order to obtain the flow stress characteristics of various sheet materials, such as steels, stainless steels, and aluminum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040007
EISBN: 978-1-62708-300-3
... by (a) tool geometry, (b) friction conditions, (c) characteristics of the stock material, and (d) thermal conditions existing in the deformation zone. The details of metal flow influence the quality and the properties of the formed product and the force and energy requirements of the process. The mechanics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870183
EISBN: 978-1-62708-314-0
... of the product form used. For example, well-consolidated hot melt–impregnated tape can be successfully consolidated in very short times (minutes if not seconds), while woven powder coated or comingled prepregs require longer times for the resin to flow and impregnate the fibers. Occasionally, a process called...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400203
EISBN: 978-1-62708-316-4
... Abstract This chapter describes the various types of cushion systems used in forming presses and their effect on part quality. It begins with a review of the deep drawing process, explaining that wrinkling, tearing, and fracture are the result of excess or insufficient material flow, which can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040091
EISBN: 978-1-62708-300-3
... for simulation based on the symmetry of the component to be analyzed. Assign workpiece material properties in the form of the flow stress curves. These may be user defined or selected from the database provided in the FE package. Mesh the workpiece using mesh density windows, if necessary, to refine mesh...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240279
EISBN: 978-1-62708-251-8
... section, such as bars, solid and hollow sections, tubes, wires, and strips from materials that cannot be formed by cold extrusion. The three basic types of hot extrusion are nonlubricated, lubricated, and hydrostatic ( Fig. 16.17 ). In nonlubricated hot extrusion, the material flows by internal shear...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780064
EISBN: 978-1-62708-281-5
... plastic in the cavity. The heat and pressure cause the material to flow and fill the cavity details. In many compression molding processes, excess plastic forms a flash that will be removed in a secondary operation. The plastic material will then be allowed to cure or set, and the plastic part...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040211
EISBN: 978-1-62708-300-3
... life warm forging 17.1 Introduction Cold forging is defined as forming or forging of a bulk material at room temperature with no initial heating of the preform or intermediate stages. Cold extrusion is a special type of forging process wherein the cold metal flows plastically under compressive...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700177
EISBN: 978-1-62708-279-2
... is determined by the work-hardening rate of the material; its tensile strength level increases with increase in that rate. Increased work hardening creates higher loads on press, tools, lubricant, and other load points. In a forming operation, the flow stress determines the magnitude of the forming load...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500107
EISBN: 978-1-62708-317-1
... illustrating the required additional forming force (load) and energy in forming DP 600 While the flow-stress curve of the sheet material determines the magnitude of tool stresses and forming forces, the area under the flow-stress curve determines the forming energy, that is, ram force and ram...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730139
EISBN: 978-1-62708-283-9
... Abstract This chapter describes the processes, applications, and limitations of forming and shaping various materials. It discusses bulk forming, hot working, cold working, sheet forming, and polymer and powder processing. bulk forming cold working hot working polymer processing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040319
EISBN: 978-1-62708-300-3
... constant. These fluctuations affect the dimensional accuracy of the forming process. The billet dimensions and material properties (flow stress) can be controlled by involving the suppliers in the design process to ensure procurement of billets with consistent dimensions and flow stress. The variation...