Numerical study of rolling process on the plastic strain distribution in wire + arc additive manufactured Ti-6Al-4V

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Numerical study of rolling process on the plastic strain distribution in wire + arc additive manufactured Ti-6Al-4V. / Abbaszadeh, M.; Hönnige, J.; Martina, F. et al.
In: AIP Conference Proceedings, Vol. 2113, No. 1, 150019, 02.07.2019.

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Abbaszadeh M, Hönnige J, Martina F, Kashaev N, Williams SW, Klusemann B. Numerical study of rolling process on the plastic strain distribution in wire + arc additive manufactured Ti-6Al-4V. AIP Conference Proceedings. 2019 Jul 2;2113(1):150019. doi: 10.1063/1.5112695

Bibtex

@article{aca8b936e9dd4a8f989c4180da0aa97e,
title = "Numerical study of rolling process on the plastic strain distribution in wire + arc additive manufactured Ti-6Al-4V",
abstract = "Wire+arc additive manufacturing (WAAM) is an additive manufacturing (AM) process that employs wire as the feedstock and an arc as energy source, to construct near net-shape components at high build rates. Ti-6Al-4V deposits typically form large columnar prior β grains that can grow through the entire component height, leading to anisotropy and lower mechanical properties, compared to the equivalent wrought alloy. Cold-working techniques such as rolling can be used to promote grain refinement in Ti-6Al-4V WAAM parts, thus increasing strength and eliminating anisotropy concomitantly. Additionally, rolling can be beneficial in terms of reduction of residual stress and distortion. The aim of this study is to illustrate the effect of rolling process parameters on the plastic deformation characteristics in Ti-6Al-4V WAAM structures. To produce a certain refinement of the microstructure, a certain amount of strain is typically required; thus suitable design guidelines for practical applications are needed. The effect of different rolling process parameters, in particular, rolling load and roller profile radius on the plastic strain distribution is investigated based on the finite element method. From a numerical point of view, the effect of the stiffness of the roller is investigated, e.g. deformable vs. rigid roller. Results indicate that for an identical rolling load, the deformable roller produces lower equivalent plastic strains due to its own elastic deformation. Additionally, a lower friction coefficient produces higher equivalent plastic strains near the top surface but, it has an insignificant effect on the plastic deformation further away from the top surface. However, numerically the computation time significantly increased for a higher friction coefficient. Larger roller profile radii lead to lower plastic strain near the top surface, but simultaneously had nearly no noticeable effect on plastic strains at deeper depth. In addition, the effect of interspace between rollers on the uniformity of the plastic strain during multi-pass rolling was investigated for a selected example. The results show that a higher uniform plastic strain distribution is obtained when the interspace between two rollers is equal to the residual width of the groove produced by a single rolling pass.",
keywords = "Engineering",
author = "M. Abbaszadeh and J. H{\"o}nnige and F. Martina and N. Kashaev and Williams, {S. W.} and Benjamin Klusemann",
note = "ISBN: 978-073541847-9; International ESAFORM Conference on Material Forming- ESAFORM 2019, ESAFORM ; Conference date: 08-05-2019 Through 10-05-2019",
year = "2019",
month = jul,
day = "2",
doi = "10.1063/1.5112695",
language = "English",
volume = "2113",
journal = "AIP Conference Proceedings",
issn = "0094-243X",
publisher = "American Institute of Physics Inc.",
number = "1",

}

RIS

TY - JOUR

T1 - Numerical study of rolling process on the plastic strain distribution in wire + arc additive manufactured Ti-6Al-4V

AU - Abbaszadeh, M.

AU - Hönnige, J.

AU - Martina, F.

AU - Kashaev, N.

AU - Williams, S. W.

AU - Klusemann, Benjamin

N1 - Conference code: 22

PY - 2019/7/2

Y1 - 2019/7/2

N2 - Wire+arc additive manufacturing (WAAM) is an additive manufacturing (AM) process that employs wire as the feedstock and an arc as energy source, to construct near net-shape components at high build rates. Ti-6Al-4V deposits typically form large columnar prior β grains that can grow through the entire component height, leading to anisotropy and lower mechanical properties, compared to the equivalent wrought alloy. Cold-working techniques such as rolling can be used to promote grain refinement in Ti-6Al-4V WAAM parts, thus increasing strength and eliminating anisotropy concomitantly. Additionally, rolling can be beneficial in terms of reduction of residual stress and distortion. The aim of this study is to illustrate the effect of rolling process parameters on the plastic deformation characteristics in Ti-6Al-4V WAAM structures. To produce a certain refinement of the microstructure, a certain amount of strain is typically required; thus suitable design guidelines for practical applications are needed. The effect of different rolling process parameters, in particular, rolling load and roller profile radius on the plastic strain distribution is investigated based on the finite element method. From a numerical point of view, the effect of the stiffness of the roller is investigated, e.g. deformable vs. rigid roller. Results indicate that for an identical rolling load, the deformable roller produces lower equivalent plastic strains due to its own elastic deformation. Additionally, a lower friction coefficient produces higher equivalent plastic strains near the top surface but, it has an insignificant effect on the plastic deformation further away from the top surface. However, numerically the computation time significantly increased for a higher friction coefficient. Larger roller profile radii lead to lower plastic strain near the top surface, but simultaneously had nearly no noticeable effect on plastic strains at deeper depth. In addition, the effect of interspace between rollers on the uniformity of the plastic strain during multi-pass rolling was investigated for a selected example. The results show that a higher uniform plastic strain distribution is obtained when the interspace between two rollers is equal to the residual width of the groove produced by a single rolling pass.

AB - Wire+arc additive manufacturing (WAAM) is an additive manufacturing (AM) process that employs wire as the feedstock and an arc as energy source, to construct near net-shape components at high build rates. Ti-6Al-4V deposits typically form large columnar prior β grains that can grow through the entire component height, leading to anisotropy and lower mechanical properties, compared to the equivalent wrought alloy. Cold-working techniques such as rolling can be used to promote grain refinement in Ti-6Al-4V WAAM parts, thus increasing strength and eliminating anisotropy concomitantly. Additionally, rolling can be beneficial in terms of reduction of residual stress and distortion. The aim of this study is to illustrate the effect of rolling process parameters on the plastic deformation characteristics in Ti-6Al-4V WAAM structures. To produce a certain refinement of the microstructure, a certain amount of strain is typically required; thus suitable design guidelines for practical applications are needed. The effect of different rolling process parameters, in particular, rolling load and roller profile radius on the plastic strain distribution is investigated based on the finite element method. From a numerical point of view, the effect of the stiffness of the roller is investigated, e.g. deformable vs. rigid roller. Results indicate that for an identical rolling load, the deformable roller produces lower equivalent plastic strains due to its own elastic deformation. Additionally, a lower friction coefficient produces higher equivalent plastic strains near the top surface but, it has an insignificant effect on the plastic deformation further away from the top surface. However, numerically the computation time significantly increased for a higher friction coefficient. Larger roller profile radii lead to lower plastic strain near the top surface, but simultaneously had nearly no noticeable effect on plastic strains at deeper depth. In addition, the effect of interspace between rollers on the uniformity of the plastic strain during multi-pass rolling was investigated for a selected example. The results show that a higher uniform plastic strain distribution is obtained when the interspace between two rollers is equal to the residual width of the groove produced by a single rolling pass.

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85068836241&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/c333a51a-af67-3b08-9174-ccec2f95fb94/

U2 - 10.1063/1.5112695

DO - 10.1063/1.5112695

M3 - Conference article in journal

AN - SCOPUS:85068836241

VL - 2113

JO - AIP Conference Proceedings

JF - AIP Conference Proceedings

SN - 0094-243X

IS - 1

M1 - 150019

T2 - International ESAFORM Conference on Material Forming- ESAFORM 2019

Y2 - 8 May 2019 through 10 May 2019

ER -

DOI

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