1 on the eutectic spacings, undercoolings and microhardness of directional solidified bismuth-lead eutectic alloy

Koçak Y., Engin S., Böyük U., Maraşlı N.

Current Applied Physics, cilt.13, sa.3, ss.587-593, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13 Sayı: 3
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.cap.2012.10.005
  • Dergi Adı: Current Applied Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.587-593
  • Anahtar Kelimeler: Metals and alloys, Directional solidification, Mechanical properties, Microstructure
  • İstanbul Gelişim Üniversitesi Adresli: Hayır

Özet

Bi-Pb alloy at the eutectic composition was unidirectionally solidified upwards with five different growth rates (V = 7.05-113.09 μm/s) at constant temperature gradient (G = 2.18 K/mm) in a Bridgman type directional growth furnace in order to investigate dependency of eutectic spacing (λ), minimum undercooling (ΔT) and microhardness (HV) on the growth rates (V). The values of λ and HV were measured from the quenched samples and the minimum undercooling (ΔT) were determined from the Jackson-Hunt eutectic theory. The dependency of eutectic spacings, microhardness and undercooling on growth rate was investigated. According to these results it has been found that the value of λ decreases with increasing the value of V and that the values of HV and ΔT increase for a constant G. The values of λ2V, λΔT and ΔTV-0.5 were determined by using the values of λ, ΔT and V. The results obtained in the present work have been compared with those predicted by the Jackson-Hunt eutectic theory and with similar experimental results. © 2012 Elsevier B.V. All rights reserved.