Effect of Grain Size on the Weldability of Cast Alloy 718
作者： Xiao Huang , N. L. Richards , M. C. Chaturvedi
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摘要: Abstract Electron beam welding was conducted on cast alloy 718 with varying grain sizes obtained using Microcast (MX™) and conventional (CC) techniques. The average value per section of Total Crack Length (Av. TCL) measured each cross used to represent the material's weldability. It found for first time that size had a reduced effect weldability alloys, relative reported in literature wrought alloys; i.e., increased range 90–3000 microns resulted improved This determined be related probability welds intersecting boundaries causing boundary microfissuring. conclusion from experimental analysis is corroborated by use Weibull-type evaluate weld microfissure occurring size. As increases, grains reduced, thus, likelihood microfiss...
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