Mechanical properties of directionally solidified lead-antimony alloys

作者：Sahin Mevlut; Kaya Hasan^*

来源：International Journal of Minerals Metallurgy and Materials, 2011, 18(5): 582-588.

DOI：10.1007/s12613-011-0481-2

• lead-antimony alloy
• directional solidification
• microstructure
• mechanical properties

The Pb-17w% Sb alloy was directionally solidified under two solidification conditions: with different temperature gradients (G=0.93-3.67 K/mm) at a constant growth rate (V=17.50 mu m/s) and with different growth rates (V=8.3-497 mu m/s) at a constant temperature gradient (G=3.67 K/mm) in a Bridgman furnace. Microstructure parameters, such as primary dendrite arm spacing (lambda(1)), secondary dendrite arm spacing (lambda(2)), and dendrite tip radius (R), were measured. The microhardness (Hv) and ultimate tensile strength (sigma) of the directional solidification samples were also measured. The influences of solidification and microstructure parameters on Hv and sigma were investigated. The results obtained in this work were compared with similar experimental researches in literatures. It is shown that the Hv and sigma values increase with the increase of G and V, but decrease with the increase of lambda(1), lambda(2), and R.

• 出版日期2011-10