Plastic Deformation Behavior Measured by Using Natural Strain Theory under Cyclic Load after Pre-deformation

An understanding of the plastic deformation behavior of Ti6Al4V (Ti64) is of great interest because it is used in aerospace applications due to its high specific strength. In addition, Ti alloys have limited slip systems due to hexagonal crystal structure; hence twinning plays an important role in plastic deformation. The present work focuses upon the grain size effect on plastic deformation behaviour of Ti64. Various microstructures with different grain size were developed via annealing of Ti64 alloy in α-β phase regime (825°C and 850°C) for 4 hours followed by air cooling. The deformation behavior of these samples was investigated at various deformation temperature and strain rate conditions. Detailed microstructure studies showed that (i) smaller grains undergoes twinning only at low temperature and high strain rate, (ii) large grain samples undergo twinning at all temperatures & strain rates, though the extent of twinning varied.

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Plastic Deformation Behavior of Metal for Complex Loading Paths

Bulletin of JSME ◽

10.1299/jsme1958.18.1209 ◽

1975 ◽

Vol 18 (125) ◽

pp. 1209-1217 ◽

Cited By ~ 3

Author(s):

Kenji KANEKO ◽

Kozo IKEGAMI ◽

Eiryo SHIRATORI

Keyword(s):

Plastic Deformation ◽

Deformation Behavior ◽

Complex Loading ◽

Loading Paths ◽

Plastic Deformation Behavior

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Prediction of 3D Microstructure and Plastic Deformation Behavior in Dual-Phase Steel Using Multi-Phase Field and Crystal Plasticity FFT Methods

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.651-653.570 ◽

2015 ◽

Vol 651-653 ◽

pp. 570-574 ◽

Cited By ~ 3

Author(s):

Akinori Yamanaka

Keyword(s):

Plastic Deformation ◽

Crystal Plasticity ◽

Phase Field ◽

Deformation Behavior ◽

Fast Fourier Transformation ◽

Dual Phase ◽

Dp Steel ◽

3D Microstructure ◽

Plastic Deformation Behavior ◽

Multi Phase

The plastic deformation behavior of dual-phase (DP) steel is strongly affected by its underlying three-dimensional (3D) microstructural factors such as spatial distribution and morphology of ferrite and martensite phases. In this paper, we present a coupled simulation method by the multi-phase-field (MPF) model and the crystal plasticity fast Fourier transformation (CPFFT) model to investigate the 3D microstructure-dependent plastic deformation behavior of DP steel. The MPF model is employed to generate a 3D digital image of DP microstructure, which is utilized to create a 3D representative volume element (RVE). Furthermore, the CPFFT simulation of tensile deformation of DP steel is performed using the 3D RVE. Through the simulations, we demonstrate the stress and strain partitioning behaviors in DP steel depending on the 3D morphology of DP microstructure can be investigated consistently.

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Study of the Titanium Alloy Deformation Behavior in Equal Channel Angular Extrusion

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.345-346.177 ◽

2007 ◽

Vol 345-346 ◽

pp. 177-180 ◽

Cited By ~ 1

Author(s):

Dyi Cheng Chen ◽

Yi Ju Li ◽

Gow Yi Tzou

Keyword(s):

Plastic Deformation ◽

Titanium Alloy ◽

Deformation Behavior ◽

Equal Channel Angular Extrusion ◽

Effective Strain ◽

Processing Conditions ◽

Rigid Plastic ◽

Die Geometry ◽

Extrusion Processing ◽

Plastic Deformation Behavior

The shear plastic deformation behavior of a material during equal channel angular (ECA) extrusion is governed primarily by the die geometry, the material properties, and the processing conditions. Using commercial DEFORMTM 2D rigid-plastic finite element code, this study investigates the plastic deformation behavior of Ti-6Al-4V titanium alloy during 1- and 2-turn ECA extrusion processing in dies containing right-angle turns. The simulations investigate the distributions of the billet mesh, effective stress and effective strain under various processing conditions. The respective influences of the channel curvatures in the inner and outer regions of the channel corner are systematically examined. The numerical results provide valuable insights into the shear plastic deformation behavior of Ti-6Al-4V titanium alloy during ECA extrusion.

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