Evolution of dislocation structures and deformation behavior of iron at different temperatures: Part I. strain hardening curves and cellular structure

Equal channel angular extrusion/pressing multipass simulations were carried for two routes, Route A and Route C, by using finite element code Abaqus/Explicit. Realistic parameters like strain hardening behavior of material, friction between the sample and die were considered for simulations. The strain homogeneity and deformation behavior of samples during multipass ECAE with different routes were studied. The deformation behavior of the sample processed through Route A is smooth. Accordingly strain homogeneity of the samples was more of a possibility with Route A than with Route C.

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Corrigendum: Strain hardening and micro-deformation behavior in advanced DP and TRIP steels: EBSD examinations and crystal plasticity simulations (2018 Mater. Res. Express 5 126507)

Materials Research Express ◽

10.1088/2053-1591/ab05eb ◽

2019 ◽

Vol 6 (5) ◽

pp. 059501

Author(s):

N Saeidi ◽

M Jafari ◽

F Ashrafizadeh ◽

M Karimi ◽

S Ziaei-Rad ◽

...

Keyword(s):

Strain Hardening ◽

Crystal Plasticity ◽

Deformation Behavior ◽

Trip Steels ◽

Micro Deformation

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PREDICTION OF A MODIFIED PTW MODEL FOR VARIOUS TAYLOR IMPACT TESTS OF TANTALUM

International Journal of Modern Physics B ◽

10.1142/s0217979208051868 ◽

2008 ◽

Vol 22 (31n32) ◽

pp. 6247-6252 ◽

Cited By ~ 1

Author(s):

JONG-BONG KIM ◽

HYUNHO SHIN

Keyword(s):

Strain Rate ◽

Strain Hardening ◽

Impact Test ◽

Constitutive Behavior ◽

Test Results ◽

Impact Tests ◽

Different Temperatures ◽

Taylor Impact ◽

Prediction Capability ◽

Voce Equation

The strain hardening part of the Preston-Tonks-Wallace (PTW) model, developed for the description of the plastic constitutive behavior of materials at wide ranges of strain, strain rate, and temperature, has been modified by employing the Voce equation. The prediction capability of the modified PTW (MPTW) has been investigated with reference to Taylor impact test results in the literature, and comparison has been made with the models of Johnson-Cook (JC), Steiberg-Guinan (SG), Zerilli-Armstrong (ZA), and PTW. Of the compared existing models, no model was appropriate for describing the results of various Taylor impact tests. However, the modified PTW is shown to predict fairly accurate results in terms of the length, diameter, and shape of the deformed specimen tested at different temperatures and impact velocity.

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Modeling of Flow Curve at High Temperature for a Ti-6Al-4V Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.849.195 ◽

2013 ◽

Vol 849 ◽

pp. 195-199

Author(s):

Jiranuwat Porntadawit ◽

Vitoon Uthaisangsuk ◽

Paiboon Choungthong

Keyword(s):

Process Design ◽

Deformation Behavior ◽

Constitutive Models ◽

Strain Rates ◽

Compression Tests ◽

Forming Process ◽

Flow Curves ◽

Different Temperatures ◽

Machine Parts ◽

Strain Responses

Titanium alloy grade Ti-6Al-4V has been widely applied for many applications such as aircraft structural components, machine parts, and parts for medical equipments. To understand deformation behavior and microstructure evolution of the material during hot forming process is significant for achieving desired dimension and final mechanical properties of a product. In this study, stress-strain responses of the Ti-6Al-4V alloy were investigated using hot compression tests at different temperatures and strain rates. The determined flow curves of the alloy were subsequently calculated according to the constitutive models based on Cingara equation and Shafiei and Ebrahimi equation and compared with the experimental results. By this manner, influences of work hardening and dynamic recrystallization on the hot deformation behavior of material could be described. Accurate prediction of flow curves can considerably improve the forming process design.

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