Effects of an external electric field applied during the solution heat treatment of the Al-Mg-Si-Cu alloy AA6111
-
Hans Conrad
and
Kang Jung
Abstract
The application of an external dc electric field during the solution heat treatment (SHT) of AA6111 Al alloy increased the as-quenched resistivity ρ and hardness Hv. The increases represented reductions in SHT of 10–20 K required for a constant ρ or Hv. Analysis of the results gave that the field reduced both the enthalpy and entropy of solution. The resulting reduction in Gibbs free energy gave increases of 0.03–0.04 at.% in solubility of Mg2Si (or Al –Mg– Si – (Cu)-vacancy complexes) at 400 –600 °C, amounting to a factor of 33% increase in solubility at 400 °C and 6% at 600 °C.
The experimental part of this research was funded by USAMP project number AMD308, DOE Project P. O.# 02-694, with Drs. M. Demeri and A. Sherman as monitors. This research was supported, in whole or in part, by the Department of Energy Cooperative Agreement No. DE-FC05-02DR22910. Such support does not constitute an endorsement by the Department of Energy of the views expressed herein. The analytical portion of this research is based on work supported by, or in part by, the U.S. Army Research Laboratory and the U. S. Army Research Office under Contract No. DAA190210315, with Dr. William Mullins as monitor.
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© 2004 Carl Hanser Verlag, München
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- Notifications/Mitteilungen
- Personal/ Personelles
- Books/Bücher
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Articles in the same Issue
- Frontmatter
- Editorial
- Challenges and interesting observations associated with feedback-controlled nanoindentation
- Nanoscratching on surfaces: the relationships between lateral force, normal force and normal displacement
- Nano-scratch testing on thin diamond-like carbon coatings for microactuators: friction, wear and elastic-plastic deformation
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- Nanomechanical characterization of Ti-base nanostructure-dendrite composite
- Surface topography and nanomechanical/tribological behaviour of ultrathin nitride films on silicon
- Viscosity of glass at high contact pressure during indentation experiments
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- Technique for measuring the residual strain in strained Si/SiGe MOSFET structures using Raman spectroscopy
- Partial atomic volumes of early transition metals in A10 metal-based solid solutions
- Effects of an external electric field applied during the solution heat treatment of the Al-Mg-Si-Cu alloy AA6111
- Fatigue crack propagation in pseudoelastic TiNi smart microcomponents
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- Press/ Presse
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- Conferences / Konferenzen
- Frontmatter
- Editorial
- Editorial
- Articles Basic
- Challenges and interesting observations associated with feedback-controlled nanoindentation
- Nanoscratching on surfaces: the relationships between lateral force, normal force and normal displacement
- Nano-scratch testing on thin diamond-like carbon coatings for microactuators: friction, wear and elastic-plastic deformation
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- Fatigue crack propagation in pseudoelastic TiNi smart microcomponents
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