A multiscale constitutive model coupled with martensitic transformation kinetics for micro-scaled plastic deformation of metastable metal foils

2021 ◽  
pp. 106503
Author(s):  
B. Meng ◽  
Y.Z. Liu ◽  
M. Wan ◽  
M.W. Fu
Keyword(s):  
Plastic Deformation ◽  
Martensitic Transformation ◽  
Constitutive Model ◽  
Transformation Kinetics ◽  
Metal Foils

scholarly journals A Model for Conjoint Shape Memory and Pseudo-Elastic Effects during Martensitic Transformation

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
K. Boubaker
Keyword(s):  
Plastic Deformation ◽  
Martensitic Transformation ◽  
Constitutive Model ◽  
Shape Memory ◽  
Young Modulus ◽  
Kinetics Equation ◽  
Initial Shape ◽  
One Dimensional ◽  
Martensite Fraction ◽  
New Formulation

Shape memory alloys (SMA) are metals which can restore their initial shape after having been subjected to a deformation. They exhibit in general both nonlinear shape memory and pseudoelastic effects. In this paper, shape memory alloy (SMA) and its constitutive model with an empirical kinetics equation are investigated. A new formulation to the martensite fraction-dependent Young modulus has been adopted and the plastic deformation was taken into account. To simulate the variations, a one-dimensional constitutive model was constructed based on the uniaxial tension features.

scholarly journals Influence of the martensitic transformation kinetics on the magnetocaloric effect in Ni-Mn-In

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
L. Pfeuffer ◽  
T. Gottschall ◽  
T. Faske ◽  
A. Taubel ◽  
F. Scheibel ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Magnetocaloric Effect ◽  
Transformation Kinetics

MULTI-SCALE FINITE ELEMENT SIMULATION OF SEVERE PLASTIC DEFORMATION

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1621-1626
Author(s):  
HYOUNG SEOP KIM
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Severe Plastic Deformation ◽  
Constitutive Model ◽  
Dislocation Cell ◽  
Ultrafine Grain ◽  
Angular Pressing ◽  
Element Simulation ◽  
Ultrafine Grain Size ◽  
Ultrafine Grained

The technique of severe plastic deformation (SPD) enables one to produce metals and alloys with an ultrafine grain size of about 100 nm and less. As the mechanical properties of such ultrafine grained materials are governed by the plastic deformation during the SPD process, the understanding of the stress and strain development in a workpiece is very important for optimizing the SPD process design and for microstructural control. The objectives of this work is to present a constitutive model based on the dislocation density and dislocation cell evolution for large plastic strains as applied to equal channel angular pressing (ECAP). This paper briefly introduces the constitutive model and presents the results obtained with this model for ECAP by the finite element method.

Effect of Thermal Cycling (γε) on Martensitic Transformation Kinetics and Damping Capacity of Fe –17mass%Mn Alloy

2006 ◽  
Vol 319 ◽  
pp. 59-66 ◽  
Author(s):  
Young Kook Lee ◽  
Young Seob Seo ◽  
Won Jin ◽  
Chong Sool Choi
Keyword(s):  
Martensitic Transformation ◽  
Thermal Cycling ◽  
Damping Capacity ◽  
Transformation Kinetics ◽  
Burst Mode ◽  
Martensite Content ◽  
Nucleation Sites ◽  
Ε Martensite

Effect of thermal cycling(γ↔ε) on γ→ε martensitic transformation kinetics and damping capacity of Fe-17mass%Mn alloy has been studied. The amount of ε martensite increases with thermal cycling in spite of decrease in Ms temperature. The increase in ε martensite content with thermal cycling is attributable to an increase in the density of martensite nucleation sites by introduction of dislocations during thermal cycling. The γ→ε martensitic transformation kinetics shows a burst mode in the non-cycled specimen, while the kinetics exhibits a sigmoidal mode in the cycled specimens. The damping capacity of the alloy increases with increasing the ε martensite content in the non-cycled specimen. On the contrary, the damping capacity of the alloy decreases with increasing the ε martensite content in the cycled specimens. The reason is that the dislocations introduced during thermal cycling, which obstruct the movement of the damping sources, become more with thermal cycling.

Effect of Plastic Deformation on the Isothermal FCC/HCP Phase Transformation during Aging of Co-27Cr-5Mo-0.05C Alloy

2007 ◽  
Vol 560 ◽  
pp. 23-28
Author(s):  
A. Mani-Medrano ◽  
Armando Salinas-Rodríguez
Keyword(s):  
Plastic Deformation ◽  
Martensitic Transformation ◽  
Tensile Deformation ◽  
Internal Stresses ◽  
X Ray Diffraction ◽  
Thermally Activated ◽  
Prior Plastic Deformation ◽  
Last Stage ◽  
Isothermal Martensitic Transformation

The effects of tensile deformation on the amount of hcp phase formed during a 3 hour isothermal aging at 800 °C is studied using in-situ X-ray diffraction and scanning electron microscopy. It is shown that the start of the isothermal martensitic transformation during aging of this material is delayed by prior plastic deformation. Nevertheless, the total amount of hcp phase present in the microstructure at the beginning of aging increases at a continuously decreasing rate due to stress-assisted transformation. This behavior is attributed to the relieving of internal stresses produced by plastic deformation prior to aging. Finally, during the last stage of aging, the amount of hcp phase in the microstructure increases as a result of isothermal martensitic transformation. It is suggested that the presence of mechanically-induced hcp phase during aging inhibits the thermally activated nucleation process that leads to the isothermal martensitic transformation.

Sign in / Sign up

Export Citation Format

Share Document