Mechanical Processing of Sintered Materials

Part-1: Theoretical Analysis of Sinter-Forging Processes

Saranjit Singh

• Publisher: Sciendo
• Year: 2020
• eBook ISBN: 9788366675131
• Edition: 1
• Topic: Technology & Engineering
• Subtopic: Physics
• Index: Physics

Mechanical processing of sintered materials in the form of metal powder preforms includes techniques such as sinter-forging, sinter-extrusion, sinter-rolling etc. One technique, which has aroused interest globally for producing high performance components economically, is sinter-forging, which combines the advantages associated with powder metallurgy and conventional forging techniques. The process is attractive because it avoids large number of operations, high scrap losses and energy consumption associated with conventional manufacturing processes. The technology, though have been extensively applied throughout the world for manufacture of numerous components, still requires to be explored from several perspectives. The objective of the present book is to study, explore and investigate the deformation characteristics during mechanical processing of the sintered materials.

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Table of contents

• Saranjit_Book_Part-1.doc
• ACKNOWLEDGMENT
• PREFACE
• CONTENTS
• LIST OF FIGURES
• Description
• NOMENCLATURE
• 1.4 PLASTICITY THEORY FOR SINTERED MATERIALS
• CHAPTER - 2
• BASIC EXPERIMENTAL ANALYSIS DURING SINTER-FORGING
• Sieve Analysis
• The analysis of open-die sinter forging of truncated conical preform considers one additional assumption apart from the common assumptions. It states that bulging of truncated conical preform is concentrated at smaller radius and theoretically approaches to zero, when larger radius becomes infinitively long [Gokler et al., 1999].
• 3.1.1 Velocity Field & Strain Rates
• 3.1.3 Average Bulged Profile [Sahoo & Das, 2003]
• 3.1.4 Results & Parametric Discussion
• ZONE – I & III
• ZONE – II
• 3.2.2 Energy Dissipations & Average Die Load
• ZONE – I & III
• ZONE – II
• Barreling of preform during second phase of deformation is neglected and it is assumed that inclined surface of deforming preform remains inclined during die cavity corner filling.
• 4.1.1 Velocity Field & Strain Rates
• The velocity field and strain rates satisfying equations (A.9), (4.2) and (4.3) are given as (Refer Appendix D):
• The energy dissipation due to inertia forces ‘Wa’ is given as:
• Zone-2
• The velocity field and strain rates satisfying equations (A.9), (4.25) and (4.26) are formulated similarly as in case of deformation mode-I and is given as:
• (4.29)
• The velocity field and strain rates satisfying equations (A.9), (4.26) and (4.27) are formulated similarly and given as:
• The velocity field and strain rates satisfying equations (A.9), (4.27) and (4.28) are similarly formulated and given as:
• The energy dissipation due to inertia forces ‘Wa’ is given as:
• The energy dissipation due to inertia forces ‘Wa’ is given as:
• The energy dissipation due to inertia forces ‘Wa’ is given as:
• The energy dissipation due to inertia forces ‘Wa’ is given as:
• APPENDIX A
• APPENDIX D
• APPENDIX E