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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' h; b! Q7 V+ q4 ]1 W
engineering materials. It should also be useful for research students interested in revising their knowledge of the subject. The book is based on+ h% Z J/ c! Q1 P2 H2 K* S, j
lectures originally given by the authors at the University of Lulel for engineerins students specializing in engineering materials. Surprisingly we9 a3 v1 [- D7 N+ m
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
: [. D% `6 Q7 N1 Z L. i- nin Metals (McGraw-Hilt, 1969). There have, however, been some notable developments in the subject over the last decade, particularly in
. F$ I, g5 z/ g' Mstudies of interfaces between phases and interface migration, as well as the kinetics of precipitate growth and the stability of precipitates. There have
8 \6 O! R7 h2 N5 L$ G; x) l9 \also been a number of important new practical developments based on phase transformations, including the introduction of TRIP steels (transformation5 R; s" G2 S6 |. l) T( K
induced by plastic deformation). directionally aligned eutectic composites. and sophisticated new structural steeIs with superior weldability
4 S1 ~5 N( `& _and forming properties. to mention just a few. In addition. continuous casting and high speed, high energy fusion welding have emerged strongly in
. L& H$ i! S- O" O! Y2 crecent years as irnportan t production applications of solidification. It was the objective of this course to present a treatment of phase transformations in
% K8 ~7 U- S8 ~. {4 W/ Bwhich these and other new developments could be explained in terms of the basic principles of thermodynamics and atomic mechanisms. |
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发表于 2009-1-29 16:35:39
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