Materials for engineering, 3rd Edition - (Malestrom)

158
Materials for engineering
2500
2000
Steels
Strength (MPa)
1500
1000
Titanium
alloys
Glassy alloys
500
Polymers
Wood
Silica
0
1 2 3
Elastic limit (%)
4.15 Amorphous metallic alloys combine higher strength than
crystalline metals with the elasticity of polymers. (Courtesy Elsevier.)
impact energy from a BMG head is transferred to the ball (compared with
70% for Ti). A range of tennis rackets are available that use BMG in four
areas of the frame: the increased stiffness enhances energy return with 29%
more power, it is claimed. There are also a number of medical applications
of BMG materials, where their biocompatibility and corrosion- and wearresistant
properties are attractive.
Composite or bulk metallic glasses that are lightweight and inexpensive
(e.g. Al-based alloys to replace Ti) are being developed for structural
applications by a number of research institutions, so that their wider industrial
use seems probable in the coming years.
4.6 Further reading
R.J. Brook (Ed.), Concise Encyclopedia of Advanced Ceramic Materials, Pergamon Press,
Oxford, 1991.
P.W. McMillan, Glass-Ceramics, 2nd edition, Academic Press, London, 1979.
A.M. Neville and J.J. Brooks, Concrete Technology, Longmans, Harlow, 1987.
H. Rawson, Glasses and their Applications, The Institute of Materials, London, 1991.
D.W. Richerson, Modern Ceramic Engineering, 2 nd edition, Dekker, New York, USA,
1992.
I. Soroka, Portland Cement Paste and Concrete, Macmillan, London, 1979.
Engineered Materials Handbook, Volume 4, Ceramics and Glasses, ASM International,
Ohio, USA, 1991.