The microstructure parameters and microhardness of directionally solidified Sn-Ag-Cu eutectic alloy


Böyük U., MARAŞLI N.

Journal of Alloys and Compounds, cilt.485, sa.1-2, ss.264-269, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 485 Sayı: 1-2
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.jallcom.2009.06.067
  • Dergi Adı: Journal of Alloys and Compounds
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.264-269
  • Anahtar Kelimeler: Directional solidification, Eutectics, Growth from melt, Ternary alloys
  • İstanbul Gelişim Üniversitesi Adresli: Hayır

Özet

Sn-Ag-Cu alloy of eutectic composition (Sn-3.5 wt.%Ag-0.9 wt.%Cu) was directionally solidified upward at a constant temperature gradient (G = 2.48 K/mm) in a wide range of growth rates (3.89-173.61 μm/s) by using a Bridgman type directional solidification furnace. The eutectic microstructures were observed to be plate and rod form from the directionally solidified Sn-3.5 wt.%Ag-0.9 wt.%Cu samples. The values of eutectic spacings (λ) and microhardness (HV) were measured from both transverse and longitudinal sections of the samples. The dependence of eutectic spacings (λ) and microhardness (HV) on the growth rate (V) was determined by using linear regression analysis. According to these results, it has been found that, the value of λ decreases with the increasing value of V and whereas, the value of microhardness (HV) increases for a constant G. The values of bulk growth (λ2V) were also determined by using the measured values of λ and V. The results obtained in present work were compared with the previous similar experimental results obtained for binary and ternary alloys. © 2009 Elsevier B.V. All rights reserved.