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

By S. L. Semiatin

Quantity 14A is an imperative reference for production, fabrics, and layout engineers. It presents finished insurance and crucial technical details at the process-design relationships which are had to pick out and regulate metalworking operations that produce shapes from forging, extrusion, drawing, and rolling operations. In-depth dialogue of forming apparatus, methods, fabrics, and complicated modeling thoughts make it a considerably new up-to-date ASM instruction manual.

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

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The Cockcroft and Latham maximum tensile work criterion) and FEM model predictions of stresses and strains. Similarly, in the area of microstructure evolution, variations of fraction recrystallized and recrystallized grain size developed within a workpiece during hot working are typically estimated using phenomenological models and FEM predictions of imposed strain, strain rate, and temperature (Ref 24, 25). Such approaches have been relatively successful for non-steady-state processes such as closed-die press and hammer forging as well as for cogging of steels and superalloys (see Ref 24 and the article “Practical Aspects of Converting Ingot to Billet” in this Volume).

A. L. , ASM International, 2003, Chap. 3 22. I. T. Wu, and K. Arimoto, Recent Developments in Process Simulation for Bulk Forming Processes, J. Mater. Proc. , Vol 11, 2001, p 2–9 23. G. T. T. I. Oh, Recent Development and Applications of Three Dimensional Finite-Element Modeling in Bulk-Forming Processes, J. Mater. Proc. , Vol 11, 2001, p 40–45 24. J. T. Wu, and M. Hermann, The Simulation of Bulk Forming Processes with DEFORMTM, Proc. International Conference on New Developments in Forging Technology, Fellbach/Stuttgart, Germany, June 2003 25.

The design and control of such processes depend on the characteristics of the workpiece material, the conditions at the tool/workpiece interface, the mechanics of plastic deformation (metal flow), the equipment used, and the finished-product requirements. These factors influence the selection of tool geometry and material as well as processing conditions (for example, workpiece and die temperatures and lubrication). Because of the complexity of many metalworking operations, models of various types, such as analytical, physical, or numerical models, are often relied upon to design such processes.

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