Text icon  TALAT Lecture 1204: Precipitation Hardening

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Description: This lecture provides an introduction to the metallurgy of precipitation hardening, with a presentation of the fundamental mechanisms involved and illustrations from alloys which form the basis for engineering alloys. The Al-Mg2Si system is discussed in some detail because of its commercial importance. The microstructural aspects of precipitation hardening are illustrated by examples, many of which were obtained by electron microscopy; an outline of the background to electron microscopy is given in an appendix. Familiarity with the subject matter covered in earlier lectures 1201, 1202 and 1203 is assumed.
Keywords: age hardening • Guinier-Preston zones • GP zones • solute clusters • homogeneous nucleation • supersaturated solid solution • precipitation • coherency • coarsening • precipitate-free zones • Ostwald ripening • ageing sequence • depletion • heterogeneous nucleation • slip
Categories: Science approaches > Strengthening mechanisms > Precipitation (age) hardening
Materials > Metals & alloys > Aluminium & alloys
Processes > Thermal treatments > Ageing
Created by: M H Jacobs, Interdisciplinary Research Centre in Materials, The University of Birmingham, UK
European Aluminium Association, Brussels
Published by: European Aluminium Association, Brussels
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Date created: 01 January 1999
Date added: 24 September 2009
Resource ID: 2108