Effect of boron and phosphorus on HAZ microfissuring of Allvac 718 Plus superalloy
作者： K. R. Vishwakarma , M. C. Chaturvedi
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摘要: AbstractHeat affected zone (HAZ) microfissuring was investigated in electron beam welds of two Allvac 718 PLUS (718 Plus) alloys with different boron and phosphorus contents. Two preweld solution heat treatments were used susceptibility evaluated by measuring the HAZ crack lengths both after bead on plate welding. The segregation behaviour studied before welding secondary ion mass spectrometry (SIMS). Hot ductility standard treatment also examined. results measurements, studies hot tests correlated well each other. It observed that besides constitutional liquation Nb rich MC type carbides, B P largely influenced alloy. Heat increased an increase + concentrations temper...
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