scholarly journals Designing an in-situ ultrasonic nondestructive evaluation system for ultrasonic additive manufacturing

2018 ◽  
Author(s):  
Venkata K. Nadimpalli ◽  
Peter B. Nagy
Keyword(s):  
Additive Manufacturing ◽  
Nondestructive Evaluation ◽  
Evaluation System ◽  
Ultrasonic Nondestructive Evaluation ◽  
Ultrasonic Additive Manufacturing

scholarly journals Deformation and fracture characteristics of zirconium plate produced via ultrasonic additive manufacturing

2021 ◽  
Author(s):  
Caleb P. Massey ◽  
Nitish Bibhanshu ◽  
Maxim N. Gussev ◽  
Cody J. Havrilak ◽  
Andrew T. Nelson
Keyword(s):  
Additive Manufacturing ◽  
Failure Modes ◽  
Zirconium Alloys ◽  
Image Correlation ◽  
Fracture Mechanisms ◽  
Fracture Characteristics ◽  
Ultrasonic Additive Manufacturing ◽  
Deformation And Fracture ◽  
Deformation Modes

AbstractThe microstructural evolution, deformation modes, and fracture mechanisms of zirconium plate produced using ultrasonic additive manufacturing (UAM) are presented. In addition to conventional tensile testing techniques, digital image correlation captured highly variable strain accumulation in specimens loaded perpendicular or parallel to the build height (Z). When tested in parallel to Z, delamination at prior foil/foil interfaces creates strain localization noticeable in strain rate maps, whereas specimens loaded perpendicular to Z illustrate conventional strain hardening until necking accelerates delamination. Although bond strengths are statistically and spatially variable, in situ electron backscattering diffraction tests illustrate the ability for grains near interfaces to accommodate strain with twinning and slip modes consistent with conventionally produced zirconium alloys. Finally, mixtures of ductile and delamination-induced fracture highlight the interface-driven failure modes of UAM zirconium plate in the as-built condition. Graphic abstract

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