Klaus Pöhlandt

Materials Testing for the Metal Forming Industry (eBook, PDF)

Übersetzer: Kuehl, Robert J.

• Format: PDF

Produktbeschreibung

This book is addressed to both research scientists at universities and technical institutes and to engineers in the metal forming industry. It is based upon the author's experience as head of the Materials Science Department of the In stitut fUr Umformtechnik at the University of Stuttgart. The book deals with materials testing for the special demands of the metal for ming industry. The general methods of materials testing, as far as they are not directly related to metal forming, are not considered in detail since many books are available on this subject. Emphasis is put on the determination of processing properties of metallic materials in metal forming, i. e. the forming behavior. This includes the evaluation of stress-strain curves by tensile, up setting or torsion tests as well as determining the limits of formability. Among these subjects, special emphasis has been laid upon recent developments in the field of compression and torsion testing. The transferability of test results is discussed. Some testing methods for the functional properties of workpieces in the final state after metal forming are described. Finally, methods of testing tool materials for bulk metal forming are treated. Testing methods for surface properties and tribological parameters have not been included. The emphasis is put on the deformation of the specimens. Prob lems related to the testing machines and measuring techniques as well as the use of computers are only considered in very few cases deemed necessary.

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Produktdetails

• Verlag: Springer Berlin Heidelberg
• Seitenzahl: 226
• Erscheinungstermin: 6. Dezember 2012
• Englisch
• ISBN-13: 9783642502415
• Artikelnr.: 53090768

Inhaltsangabe

1 Introduction.- 1.1 The System of Metal Forming.- 1.2 The Material before the Forming Process.- 1.3 Concluding Remarks.- 1.4 References.- 2 Determination of Flow Curves for Bulk Metal Forming.- 2.1 Basic Concepts.- 2.2 Tensile Test.- 2.3 Upsetting Test.- 2.4 Torsion Test.- 2.5 Determination of Flow Curves at Elevated Temperatures.- 2.6 Further Testing Methods for Determining Flow Curves.- 2.7 Critical Comparison of Testing Methods.- 2.8 References.- 3 Determining Flow Curves of Sheet Metal.- 3.1 Special Properties of Thin Sheet Metal.- 3.2 Tensile Test on Thin Sheet Metal.- 3.3 Plane Strain Deformation Tests.- 3.4 Hydraulic Bulge Test.- 3.5 Plane Torsion Test.- 3.6 Effects of Strain Rate and Temperature.- 3.7 Testing Superplastic Materials.- 3.8 Comparison of the Methods.- 3.9 Anisotropy.- 3.10 References.- 4 Transferability of Results.- 4.1 Basic Problem.- 4.2 Uncertainty of Experimentally Determined Flow Curves.- 4.3 Estimation of Flow Curves without Experiments.- 4.4 References.- 5 Determining the Limits of Formability.- 5.1 Basic Concepts.- 5.2 The Concept of "Ductility".- 5.3 The Forming Limit.- 5.4 Process Simulation Testing Methods.- 5.5 References.- 6 Material and Workpiece after the Forming Process.- 6.1 Overview.- 6.2 Material Behavior during Production Processes after Metal Forming.- 6.3 Material Properties after Macroscopically Homogeneous Deformation.- 6.4 Properties of Workpieces after Metal Forming.- 6.5 References.- 7 Testing Tool Materials for Bulk Metal Forming.- 7.1 Introduction.- 7.2 State of Knowledge about Tool Fracture for Bulk Metal Forming.- 7.3 Materials Testing for Tool Life Estimation.- 7.4 Application of Fracture Mechanics for Evaluating Tool Materials for Hot Forming.- 7.5 Examples of Tool Life Estimation for Cold Bulk Metal Forming.-7.6 References.- Appendix A: Supplements to the Theory and Practice of Torsion Tests.- A.1 Torsion Test on Bars.- A. 1.1 Determination of the Zero Approximation of the Flow Curve.- A. 1.2 Taylor Series Expansion of the "Correction Function".- A. 1.3 Use of Extremely Short Specimens.- A. 1.4 Recommended Specimen Geometry.- A. 1.5 Possible Sources of Error.- A.1.6 Determination of the Strain Rate Sensitivity.- A.2 Plane Torsion Test.- A.3 References.- Appendix B: Standards and Recommended Testing Procedures.- Appendix C: Chemical Composition and Comparative Designations of Steels.- Appendix D: Conversion Factors for Units.- Appendix E: Recommendations for an Uniform Procedure of Determining Flow Curves by Upsetting Cylindrical Specimens.