ABOUT THE PRESENTER
Professor Anthony D. Rollett has
worked for Carnegie Mellon University as Professor, Department of
Materials Science & Engineering as Department Head since 1995.
Prior to joining CMU, Prof. Rollett was with Los Alomas National Laboratory
from 1979 to 1995. His current research interests focuses on the relationship
of mechanical properties to microstructure, and on improving our understanding
of how microstructures evolve. The use of computers is emphasized
for processing large volumes of data and
for simulating the behavior of materials, from grain growth to plastic
flow. He is leading a project on anistropic interfaces and their impact
on microstructural evolution as part of the DOEs Computational
Materials Sciences Network.
Professor Rollett remains very active within TMS having served on
numerous technical committees and as JOM Advisor. In addition, he
actively publishes in technical journals.
TEXTURE AND ANISOTROPY FOR THE MATERIALS PROFESSIONAL
Sunday, February 17, 2002 8:30am-5:00pm
Anthony D. (Tony) Rollett, Carnegie Mellon University
Members $395, Non-members $445
Who Should Attend:
Have you always wondered what pole figures were all about?
This course will bring you up to speed on texture (i.e. crystallographic
preferred orientation) and anisotropy (e.g. different yield strengths
in different directions). You will learn how to read pole figures and
orientation distribution plots. The meaning of Euler angles and texture
components will be explained. Basic concepts in anisotropic material properties
such as modulus, strength and r-value will be related to texture.
If you work with polycrystalline materials, the chances are good that
they have some degree of texture and therefore some anisotropy. Thus anyone
who needs to understand how to measure texture and what tools are available
to quantify it (e.g. popLA) will find this useful. A background in Materials
Science & Engineering will be assumed (or some knowledge of crystal
structure and diffraction).
Many unresolved issues exist in microstructural evolution such as the
variations in grain boundary energy with misorientation, and the origin
of strong recrystallization textures in the annealing of metals. Simulation
techniques such as the Potts model are used to study grain growth, secondary
recrystallization and recrystallization. Experimental and theoretical
investigations of, for example, the early stages of recrystallization
are revealing the critical features of nucleation of new grains.
Texture-anisotropy-plasticity relationships are being investigated in
a wide range of materials. This field has been rejuvenated recently by
the advent of Orientation Imaging Microscopy, on-line texture measurement
and the ability to apply personal computers to the analysis of texture
data. Control of texture for formability and other properties is still
a significant issue for the metals industry. Learning how to process and
optimize advanced materials and composites such as those based on intermetallics
brings numerous challenges in micromechanics. Many materials are highly
anisotropic and yet conventional processing fails to take the opportunity
to engineer this aspect of materials. A fundamental theme that connects
the study of microstructure and mechanical properties is the understanding
of how microstructure evolves during deformation processing and how it
influences the properties.
Other Short Courses:
Below is a list of the other short courses that are scheduled for the
2002 TMS Annual Meeting and Exhibition: