High temperature deformation of friction stir processed 7075 aluminium alloy

Journal Article · Mon Aug 15 00:00:00 EDT 2005 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2005.04.007· OSTI ID:20748764

Cavaliere, P ^[1]; Squillace, A ^[2]

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1. Department of Ingegneria dell'Innovazione, University of Lecce, Via per Arnesano I-73100 Lecce (Italy)
2. Department of Materials and Production Engineering Faculty, University of Naples Federico II (Italy)

The mechanical and microstructural properties of 7075 aluminium alloy resulting from Friction Stir Processing (FSP), into sheets of 7 mm thickness, were analysed in the present study. The sheets were processed perpendicularly to the rolling direction; the tensile mechanical properties were evaluated at room temperature in the transverse and longitudinal directions with respect to the processing one. Tensile tests were also performed at higher temperatures and different strain rates in the nugget zone, in order to analyse the superplastic properties of the recrystallized material and to observe the differences from the parent material as a function of the strong grain refinement due to the Friction Stir Process. The high temperature behaviour of the material was studied, in the parallel direction, by means of tensile tests in the temperature and strain rate ranges of 150-500 deg. C and 10{sup -} {sup 2}-10{sup -} {sup 4} s{sup -} {sup 1} respectively, electron microscopy (FEGSEM) observations were carried out to investigate more closely the fracture surfaces of the specimens tested at different temperatures and strain rates.

• OSTI ID: 20748764
• Journal Information: Materials Characterization, Vol. 55, Issue 2; Other Information: DOI: 10.1016/j.matchar.2005.04.007; PII: S1044-5803(05)00117-8; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
DEFORMATION
ELECTRON MICROSCOPY
FRACTURES
FRICTION
GRAIN REFINEMENT
MECHANICAL PROPERTIES
MICROSTRUCTURE
ROLLING
SHEETS
STRAIN RATE
SURFACES
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
THICKNESS
ZONES