By S. L. Semiatin

ISBN-10: 087170708X

ISBN-13: 9780871707086

Quantity 14A is an vital reference for production, fabrics, and layout engineers. It offers finished assurance and crucial technical details at the process-design relationships which are had to pick out and keep an eye on metalworking operations that produce shapes from forging, extrusion, drawing, and rolling operations. In-depth dialogue of forming apparatus, tactics, fabrics, and complex modeling concepts make it a considerably new up-to-date ASM instruction manual.

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Extra resources for Asm Handbook: Volume 14A: Metalworking : Bulk Forming (ASM Handbook)

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Novel can designs and the use of a controlled dwell time between billet removal from the preheat furnace and deformation have greatly enhanced the feasibility of hot extrusion. In particular, the dwell time is chosen in order to develop a temperature difference between the sacrificial can material and the titanium aluminide preform; by this means the flow stresses of the two components is similar, thereby promoting uniform co-extrusion. Secondary processing of parts has been most often conducted via isothermal closed-die forging (Fig.

Models of this sort include lower- and upper-bound approaches in which either stress or strain compatibility is enforced among the grains in a polycrystalline aggregate, respectively. Upper-bound models give reasonable estimates of deformation texture evolution in many cases. However, more-detailed approaches, which incorporate strain variations from grain to grain (so-called self-consistent models) as well as within each grain (crystal-plasticity FEM techniques, or CPFEM), offer the promise of even more accurate predictions.

This Volume presents the state-of-the-art in bulk-metalworking processes. A companion volume (ASM Handbook, Volume 14B, Metalworking: Sheet Forming) describes the state-ofthe-art in sheet-forming processes. Various major sections of this Volume deal with descriptions of specific processes, selection of equipment and die materials, forming practice for specific alloys, and various aspects of process design and control. This article provides a brief historical perspective, a classification of metalworking processes and equipment, and a summary of some of the more recent developments in the field.

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Asm Handbook: Volume 14A: Metalworking : Bulk Forming (ASM Handbook) by S. L. Semiatin


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