Mechanical properties of directionally solidified lead-antimony alloys

Abstract

The Pb-17wt% 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 μm/s) and with different growth rates (V=8.3-497 μm/s) at a constant temperature gradient (G=3.67 K/mm) in a Bridgman furnace. Microstructure parameters, such as primary dendrite arm spacing (λ 1 ), secondary dendrite arm spacing (λ 2 ), and dendrite tip radius (R), were measured. The microhardness (Hv) and ultimate tensile strength (σ) of the directional solidification samples were also measured. The influences of solidification and microstructure parameters on Hv and σ were investigated. The results obtained in this work were compared with similar experimental researches in literatures. It is shown that the Hv and σ values increase with the increase of G and V, but decrease with the increase of λ 1 , λ 2 , and R.

Determination of Microstructure, Mechanical, Electrical and Thermal Properties of The Directionally Solidified Al-Si-Co Ternary Alloy

“…Experimental curves indicate that the highest tensile stress and lowest strain (%) values were observed for 8.35 µm/s. Similar behavior was obtained in the literature 19,20 for similar solidification condition.…”