Effect of growth rate and lamellar spacing on microhardness in the directionally solidified Pb-Cd, Sn-Zn and Bi-Cd eutectic alloys


kaya h. , Gunduz M. , ÇADIRLI E. , UZUN O.

JOURNAL OF MATERIALS SCIENCE, cilt.39, ss.6571-6576, 2004 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 39 Konu: 21
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1023/b:jmsc.0000044897.98694.be
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE
  • Sayfa Sayıları: ss.6571-6576

Özet

Lead-cadmium, Zinc-tin and Bismuth-cadmium of (99.99%) high purity eutectic alloys were melted in a graphite crucible under vacuum atmosphere. These eutectic alloys were directionally solidified upward with a constant temperature gradient G and different growth rates V in the Bridgman type directional solidification furnace. The lamellar spacings lambda and microhardness H-V were measured from both transverse section and longitudinal section of the specimen. The variations of H-V with respect to V and lambda have been determined by using the linear regression analysis method. H-V values increase with the increasing values of V and decrease with the increasing lambda values. The Hall-petch type relationships obtained in this work have been compared with the previous works. (C) 2004 Kluwer Academic Publishers.