Abstract
Directional solidification of the nickel-based superalloy El-929 was carried out by employing the exothermic technique for preparing several 150mm long × 55mm diameter rods. Specimens machined from the blanks cut at 0°, 45°, 75° and 90° to the chill surface were tensile and stress-rupture tested at different temperatures. The air-melted DS alloy, when loaded parallel to the growth direction, shows considerable improvement in stress-rupture life and tensile ductility as compared with the vacuum induction melted, forged and heat-treated alloy. However, these property advantages rapidly degrade with the increasing deviation of the load axis from the growth direction.
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Pradhan, D.C., Sharma, K.K. & Tewari, S.N. Mechanical property anisotropy in superalloy El-929 directionally solidified by an exothermic technique. J Mater Sci 21, 2871–2875 (1986). https://doi.org/10.1007/BF00551505
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DOI: https://doi.org/10.1007/BF00551505