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This book is written as an undergraduate course in phase transformations for final year students specializing in metallurgy, materials science or
0 c( ~& A+ O/ s% s U# Aengineering materials. It should also be useful for research students interested in revising their knowledge of the subject. The book is based on
6 U; U6 q/ g: @. l- _, z ilectures originally given by the authors at the University of Lulel for engineerins students specializing in engineering materials. Surprisingly we/ H9 b# `, y! \/ P$ s# H" W
found no modern treatments of this important subject in a form suitable for a course book, the most recent probably being P.G. Shewmon's Tramformations# w7 ^' V& v$ R$ j& g7 C1 S
in Metals (McGraw-Hilt, 1969). There have, however, been some notable developments in the subject over the last decade, particularly in* ~+ h* f5 _+ Z& b. Y& G4 u. Q
studies of interfaces between phases and interface migration, as well as the kinetics of precipitate growth and the stability of precipitates. There have( ^' ]1 M5 P& ~7 c Y/ V; ^- p
also been a number of important new practical developments based on phase transformations, including the introduction of TRIP steels (transformation
4 }- X+ e1 g$ U1 ?% Xinduced by plastic deformation). directionally aligned eutectic composites. and sophisticated new structural steeIs with superior weldability% I3 `+ \3 e8 Z' F1 R$ d
and forming properties. to mention just a few. In addition. continuous casting and high speed, high energy fusion welding have emerged strongly in1 a+ r- }# }9 {/ R
recent years as irnportan t production applications of solidification. It was the objective of this course to present a treatment of phase transformations in
! y/ P) W' Z' L8 g) Z5 }6 Nwhich these and other new developments could be explained in terms of the basic principles of thermodynamics and atomic mechanisms. |
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