|
Showing 1 - 4 of
4 matches in All Departments
Synthesis of nonequilibrium metallic phases has been an area of
great interest to the materials processing community since early
1960. Inherent rapid cooling rates in laser processing are being
used to engineer non-equilibrium microstructures which cannot be
rivaled by other processes. This lecture will discuss the phenomena
involved and its application in designing materials with tailored
properties. What is non-equilibrium Synthesis? This is a synthesis
method to produce binary or higher order materials where kinetics
of the pro cess affects the transport of the constituent elements
during phase transformation resulting in a composition or
crystallographic configuration which is different from what is
observed when the elements arranges themselves with the lowest
possible Gibbs Free energy, which is the equilibrium condition.
Figure 1 illustrates the phenomena. Phase diagram under equilibrium
condition is illustrated by the solid line whereas the
no-equilibrium phase diagram is represented by the dotted line. One
can observe the shrinkage of the phase field under non-equilibrium
condition. Any alloy composition between the solidus lines of the
equilibrium and non-equilibrium phase diagram will be a non
equilibrium alloys with extended solid solution."
Including papers from the 9th edition of the International
Conference on Computational Methods and Experiments in Material and
Contact Characterisation this volume presents the work of selected
researchers on the subject. Material and contact characterisation
is a rapidly advancing field and this volume contains the latest
research. Of particular interest to industry and society is the
knowledge of surface treatment and contact mechanics of these
materials to determine the in-service behaviour of components
subject to contact conditions. Modern society requires systems that
operate at conditions that use resources effectively. In terms of
components durability, the understanding of surface engineering
wear frictional and lubrication dynamics has never been so
important. Current research is focussed on modification
technologies that can increase the surface durability of materials.
The characteristics of the system reveal which surface engineering
methods should be chosen and as a consequence it is essential to
study the combination of surface treatment and contact mechanics.
The accurate characterisation of the physical and chemical
properties of materials requires the application of both
experimental techniques and computer simulation methods in order to
gain a correct analysis. A very wide range of materials, starting
with metals through polymers and semiconductors to composites,
necessitates a whole spectrum of characteristic experimental
techniques and research methods. The papers in the book cover a
number of topics, including: Experimental approaches; Recycled
materials; Metallic materials; Mechanical properties; Mechanical
and thermal properties; Composite materials; Materials for
bioengineering applications; Performance based design materials and
Numerical models.
|
|