Transactions of the Indian Institute of Metals

, Volume 62, Issue 2, pp 149–152

Deformation characterization of superplastic AA7475 alloy

Article

DOI: 10.1007/s12666-009-0020-2

Cite this article as:
Mukhopadhyay, P., Biswas, S. & Chokshi, A.H. Trans Indian Inst Met (2009) 62: 149. doi:10.1007/s12666-009-0020-2

Abstract

AA7475 alloy was deformed up to 25% elongation in INSTRON at 788K. The grain boundary sliding due to this superplastic deformation was measured by Scanning Electron Microscope. The microstructure and texture development due to this deformation at elevated temperature was analyzed from the Orientation Image Microstructures i.e. the Electron Back Scattered Diffraction Image. The Orientation Image Microstructures revealed that superplastic deformation was associated with recovery and recrystallization in-situ process.

Keywords

superplastic deformation recovery recrystallization in-situ CSL high angle and low angle boundary 

Nomenclature of symbols

ɛ

Strain

t

Total

gbs

Grain boundary sliding

d

Diffusion

L

Gauge length

w

Width of Grain boundary sliding

m

Meter (length scale)

μm

Micrometer (length scale)

K

Kelvin (Temperature)

ϕ

Phi (Geometrical constant)

\( \bar L \)

Mean linear intercept

°

Degree (Misorientation Angle)

s

Second (Time scale)

Copyright information

© Indian Institute of Metals 2009

Authors and Affiliations

  1. 1.Material Science DepartmentDefence Institute of Advanced TechnologyPuneIndia
  2. 2.Materials Engineering DepartmentIndian Institute of ScienceBangaloreIndia

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