Transformation Plasticity - The Mechanism and Some Applications

Tatsuo Inoue

doi:10.4028/www.scientific.net/MSF.614.11

Paper Titles

Organizers

Preface

Formation of Metallic Micro/Nanomaterials by Utilizing Migration Phenomena and Techniques for their Applications
p.3

Transformation Plasticity - The Mechanism and Some Applications
p.11

Nano-Size Surface Materials Stabilized by Weak Interaction
p.21

Advanced Numerical Simulation of Metal Forming Processes Using Adaptive Remeshing Procedure
p.27

Poroelasticity of Fluid-Saturated Nanoporous Media
p.35

Experimental Evaluation of the Size Effect on the Ductile and Brittle Fracture Toughness of a Steel Pressure Vessel
p.41

Synthesis and Properties of an Ultrafine Grained Ti-45Al-2Cr-2Nb-1B-0.5Ta Alloy Prepared by Double Mechanical Milling and Spark Plasma Sintering
p.49

HomeMaterials Science ForumMaterials Science Forum Vol. 614Transformation Plasticity - The Mechanism and Some...

Transformation Plasticity - The Mechanism and Some Applications

Abstract:

A phenomenological mechanism of transformation plasticity is discussed, in the first part of the paper, why the transformation plastic deformation takes place under a stress level even lower than the characteristic yield stress of the material: This is principally based on the difference in thermal expansion coefficient of mother and new phases. Some calculated data of induced stress and strain depending on applied stress are represented. Bearing in mind that it is also a kind of plastic strain, a unified plastic flow theory is derived by introducing the effect of progressing new phase into the yield function of stress, temperature and plasticity related parameters. Thus obtained strain rate reveals to include the transformation plastic part in addition to thermo-mechanical plastic components. Application of the theory is carried out to simulate some complicated cases of varying stress and temperature, and the results are compared with experimental data.