Effect of homogenization heat treatment on the microstructure and heat- affected zone microfissuring in welded cast alloy 718
作者： Xiao Huang , M. C. Chaturvedi , N. L. Richards
DOI: 10.1007/BF02648966
关键词: Metallurgy 、 Inconel 、 Carbide 、 Homogenization (chemistry) 、 Alloy 、 Heat-affected zone 、 Materials science 、 Grain boundary 、 Microstructure 、 Volume fraction
摘要: The effect of homogenization temperature on microfissuring in the heat-affected zones electronwelded cast INCONEL 718 has been studied. material was homogenized at various temperatures range 1037 ° to 1163 and air-cooled. then electron-beam welded by bead-on-plate welding technique. microstructures zone (HAZ) were evaluated analytical scanning electron microscopy (SEM). grain boundary segregation elements secondary ion mass spectroscopy (SIMS). It observed that total crack length (TCL) microfissures first decreases with increases, a minimum occurring specimen heat treated °. This trend coincides variation B boundaries explained equilibrium nonequilibrium during treatment. No other element segregate boundaries. volume fraction phases like δ-Ni3Nb, MC carbide, Laves does not follow same as for TCL Therefore, HAZ is attributed
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