标题: MECHANICAL ALLOYING [打印本页] 作者: bkdzxl 时间: 2012-10-27 18:09 标题: MECHANICAL ALLOYING x i
PREFACE
From the total initial laboratory success in 1968, the process of me-
chanical alloying (MA) has been developed into a well-controlled pro-
duction operation over the years, and applied to develop varieties of
materials. Being a new field, there is a wealth of recent scientific lit-
erature available, but it is all scattered – The problem of a beginner
to get started in a practical way with the MA technique. This book
tries to address this problem and is aimed at the undergraduates, post-
graduates, materials scientists and engineers who want to have in-depth
knowledge in this field. The book is also designed to serve as an in-
troductory and refreshment reference tool for the manufacturing en-
gineers actively involved in MA or the allied industry but are in need
of detailed knowledge of metallurgical engineering or materials science.
A two year metallurgical engineering or materials science course should
provide the necessary basis for comprehension of the material discussed
in the book.
This book tries to put forward the fundamentals of MA recipes where
the technique has been successful and highlights the areas in technology
where it can provide benefits in developing high-tech materials. Not
only this, many secrets of the MA processing approach are still in the
embryonic stage and this book creates a brainstorm in the mind of ma-
terials scientists and engineers to reveal the same. The book comprises
of twelve chapters. Starting from the historical development of the MA
technique and highlighting its benefits in Chapter 1, Chapter 2 discusses
the basic process of MA devices used for, and factors affecting the
process. This chapter deals with the different variations of MA which
have been developed over the course of time. Chapter 4 deals with
the process control agents used in MA, while Chapter 5 deals with
mechanisms involved in basic processes of MA, metastable phases for-
mation and activation of solid state chemical reactions. Chapter 6 deals
with energy transfer and energy maps in MA. Chapters 7 and 8 deal
with basics of consolidation of MA powders and mechanical proper-
ties of MA products, respectively. Chapter 9 explains the basics of
models developed to predict the results of an MA process. Joining tech-
niques for MA materials are discussed in Chapter 10. The two non-
equilibrium processing techniques, MA and rapid solidification, are com-
pared and combinations of the two to enhance the properties of the
rapidly solidified materials, have been discussed in Chapter 11. Chapter
12 is meant for highlighting the cases where the technique has been
applied to produce MA products at industrial levels and the potential
materials to find applications in the industrial scene.
My sincere thanks to the Minerals, Metals and Materials Society,
Warrendale, APMI (American Powder Metallurgy Institute) International,
New Jersey; Dr. J.S. Benjamin, Hitchiner Manufacturing Company, Inc,
Milford; Dr. H.K.D.H. Bhadeshia, University of Cambridge; Prof P.
Ramakrishnan, Indian Institute of Technology, Bombay; Prof. F.H. Froes,
University of Idaho and Prof. C.C. Koch, North Carolina State Uni-
versity, for their co-operation in completion of this task. I am grate-
ful to Prof. T.V. Rajan, Malaviya Regional Engineering College, Jaipur
for encouraging to pursue my interest in MA. I wish to acknowledge
my wife Pramila and my children Anshu and Ankit, for bearing my dis-
appearance when I was 'in the book'.