Authors: O A Bazyleva E G Arginbaeva S A Golynets A B Echin
Publish Date: 2013/11/30
Volume: 57, Issue: 7-8, Pages: 742-747
Abstract
Research is presented for the effect of macro and microstructure of singlecrystal billets of intermetallic alloy VKNA25 with different crystallographic orientations 001 011 and 111 prepared by directional crystallization using a seed on material static an dynamic strength The effect of microstructure on short and longterm strength at 900 1000 1100 1200°C on bases of 10 100 500 and 1000 h and lowcycle fatigue LCF resistance by a “stiff” cycle is studied LCF tests are performed under cyclic tension conditions with a cycle asymmetry coefficient R = 0 at 850 and 1000°C The dependence of stress rupture strength and LCF on singlecrystal billet macro and microstructure and test temperature is established
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