Cavitation in a uniaxially deformed superplastic Al-Mg alloy

DongHyun Bae, A. K. Ghosh

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Cavitation caused by superplastic straining of a fine-grained Al-Mg-Mn-Cu alloy under uniaxial tension has been systematically evaluated. Tensile tests were conducted in the strain-rate range of 10-4s-1 to 10-2s-1 and in the temperature range of 450°C to 550°C. Measurements of the number and size of cavities were made by image analysis through optical microscopy on tested specimens. With increasing imposed strain, the cavity population density increases. Cavity growth has been found to be primarily due to the plastic deformation of the matrix. These results are characterized by the total volume fraction of cavities which is found to increase exponentially with strain. However, the dependencies of cavity volume fraction on strain-rate and temperature are not straightforward and the notion of just a few large cavities controlling the total cavity volume is not always true. Attempts to explain these complex dependencies have been carried out based on the concepts of debonding between the matrix and non-deformable particles, the continuous nucleation of new cavities, and plasticity-based cavity growth for large cavities.

Original languageEnglish
Pages (from-to)61-66
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume601
Publication statusPublished - 2000 Dec 3
EventThe 1999 MRS Fall Meeting - Symposium W 'GaN and Related Alloys' - Boston, MA, USA
Duration: 1999 Nov 291999 Dec 1

Fingerprint

cavitation flow
Cavitation
Strain rate
Volume fraction
cavities
Debonding
Image analysis
Optical microscopy
Plasticity
Plastic deformation
Nucleation
Temperature
strain rate
matrices
tensile tests
image analysis
plastic properties
plastic deformation
nucleation
microscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{13d206777d5c4a3d87728200f0146b71,
title = "Cavitation in a uniaxially deformed superplastic Al-Mg alloy",
abstract = "Cavitation caused by superplastic straining of a fine-grained Al-Mg-Mn-Cu alloy under uniaxial tension has been systematically evaluated. Tensile tests were conducted in the strain-rate range of 10-4s-1 to 10-2s-1 and in the temperature range of 450°C to 550°C. Measurements of the number and size of cavities were made by image analysis through optical microscopy on tested specimens. With increasing imposed strain, the cavity population density increases. Cavity growth has been found to be primarily due to the plastic deformation of the matrix. These results are characterized by the total volume fraction of cavities which is found to increase exponentially with strain. However, the dependencies of cavity volume fraction on strain-rate and temperature are not straightforward and the notion of just a few large cavities controlling the total cavity volume is not always true. Attempts to explain these complex dependencies have been carried out based on the concepts of debonding between the matrix and non-deformable particles, the continuous nucleation of new cavities, and plasticity-based cavity growth for large cavities.",
author = "DongHyun Bae and Ghosh, {A. K.}",
year = "2000",
month = "12",
day = "3",
language = "English",
volume = "601",
pages = "61--66",
journal = "Materials Research Society Symposium - Proceedings",
issn = "0272-9172",
publisher = "Materials Research Society",

}

Cavitation in a uniaxially deformed superplastic Al-Mg alloy. / Bae, DongHyun; Ghosh, A. K.

In: Materials Research Society Symposium - Proceedings, Vol. 601, 03.12.2000, p. 61-66.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Cavitation in a uniaxially deformed superplastic Al-Mg alloy

AU - Bae, DongHyun

AU - Ghosh, A. K.

PY - 2000/12/3

Y1 - 2000/12/3

N2 - Cavitation caused by superplastic straining of a fine-grained Al-Mg-Mn-Cu alloy under uniaxial tension has been systematically evaluated. Tensile tests were conducted in the strain-rate range of 10-4s-1 to 10-2s-1 and in the temperature range of 450°C to 550°C. Measurements of the number and size of cavities were made by image analysis through optical microscopy on tested specimens. With increasing imposed strain, the cavity population density increases. Cavity growth has been found to be primarily due to the plastic deformation of the matrix. These results are characterized by the total volume fraction of cavities which is found to increase exponentially with strain. However, the dependencies of cavity volume fraction on strain-rate and temperature are not straightforward and the notion of just a few large cavities controlling the total cavity volume is not always true. Attempts to explain these complex dependencies have been carried out based on the concepts of debonding between the matrix and non-deformable particles, the continuous nucleation of new cavities, and plasticity-based cavity growth for large cavities.

AB - Cavitation caused by superplastic straining of a fine-grained Al-Mg-Mn-Cu alloy under uniaxial tension has been systematically evaluated. Tensile tests were conducted in the strain-rate range of 10-4s-1 to 10-2s-1 and in the temperature range of 450°C to 550°C. Measurements of the number and size of cavities were made by image analysis through optical microscopy on tested specimens. With increasing imposed strain, the cavity population density increases. Cavity growth has been found to be primarily due to the plastic deformation of the matrix. These results are characterized by the total volume fraction of cavities which is found to increase exponentially with strain. However, the dependencies of cavity volume fraction on strain-rate and temperature are not straightforward and the notion of just a few large cavities controlling the total cavity volume is not always true. Attempts to explain these complex dependencies have been carried out based on the concepts of debonding between the matrix and non-deformable particles, the continuous nucleation of new cavities, and plasticity-based cavity growth for large cavities.

UR - http://www.scopus.com/inward/record.url?scp=0033687752&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033687752&partnerID=8YFLogxK

M3 - Conference article

VL - 601

SP - 61

EP - 66

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

SN - 0272-9172

ER -