Acoustic softening in metals during ultrasonic assisted deformation via CP-FEM

Muhammad Amir, Tamer El Sayed

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

In this paper, a phenomenological crystal plasticity model is modified to account for acoustic (ultrasonic) softening effects based on the level of ultrasonic intensity supplied to single and polycrystalline metals. The material parameters are identified using the inverse modeling approach by interfacing the crystal plasticity model with an optimization tool. The proposed model is validated and verified by comparing the microstructure evolution with experimental EBSD results reported in the literature. The model is able to capture the ultrasonic softening effect and the results show that as the ultrasonic intensity increases, the plastic deformation also increases. Differences in the stress–strain response are explained based on the slip system orientation tensor (Schmidt factors) which depends upon the crystal orientation.
LanguageEnglish
Pages356-359
Number of pages4
JournalMaterials Letters
Volume65
DOIs
Publication statusPublished - 2011

Fingerprint

softening
Ultrasonic effects
ultrasonics
Ultrasonics
Acoustics
Metals
Finite element method
acoustics
plastic properties
metals
Plasticity
crystals
Crystals
Crystal orientation
plastic deformation
Tensors
Plastic deformation
slip
tensors
microstructure

Keywords

  • acoustic softening
  • ultrasonic assisted deformation
  • welding
  • ultrasonic softening

Cite this

Amir, Muhammad ; El Sayed, Tamer. / Acoustic softening in metals during ultrasonic assisted deformation via CP-FEM. In: Materials Letters. 2011 ; Vol. 65. pp. 356-359.
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Acoustic softening in metals during ultrasonic assisted deformation via CP-FEM. / Amir, Muhammad; El Sayed, Tamer.

In: Materials Letters, Vol. 65, 2011, p. 356-359.

Research output: Contribution to journalArticle

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T1 - Acoustic softening in metals during ultrasonic assisted deformation via CP-FEM

AU - Amir, Muhammad

AU - El Sayed, Tamer

PY - 2011

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AB - In this paper, a phenomenological crystal plasticity model is modified to account for acoustic (ultrasonic) softening effects based on the level of ultrasonic intensity supplied to single and polycrystalline metals. The material parameters are identified using the inverse modeling approach by interfacing the crystal plasticity model with an optimization tool. The proposed model is validated and verified by comparing the microstructure evolution with experimental EBSD results reported in the literature. The model is able to capture the ultrasonic softening effect and the results show that as the ultrasonic intensity increases, the plastic deformation also increases. Differences in the stress–strain response are explained based on the slip system orientation tensor (Schmidt factors) which depends upon the crystal orientation.

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KW - ultrasonic assisted deformation

KW - welding

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