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Brett, Jack Kevin

Publications and source records attributed to Brett, Jack Kevin.

Schema Elements for Granta Annual Report: FY2024

Granta: Materials Intelligence (Granta: MI) is a commercial database software distributed by Ansys, Inc. that is utilized by the Nuclear Security Enterprise (NSE) to organize and store relevant materials data. Lack of standard and well-documented database schema is the primary obstacle to an NSE materials data management solution, so the objective of this project is to create and document such a schema. In FY21, an approach for designing, documenting, and managing a standard database schema was described based on the creation of schema elements (collections of attributes used to describe particular aspects of the data) to be used as building blocks for creating various database tables without duplication. In FY22, these methods were applied through a multi-site collaboration to create and document the schema elements necessary to build a thermogravimetric analysis (TGA) testing table. In FY23 the schema was expanded to include elements for a differential scanning calorimetry (DSC) table, along with schema for supporting metadata tables including Instruments, Projects, Documents, and Testing Series. In FY24 the following progress was made, again through multi-site collaboration: • The existing schema elements were modified to accommodate thermomechanical analysis (TMA) data, and a table, Test Data: TMA, was created for managing TMA data. • The elements necessary for the following additive manufacturing (AM) data tables (directed at data specific to selective laser sintering AM technology) were created: • AM Builds • AM Processes • AM Part Designs • Built AM Parts • AM Feedstock Materials • AM Feedstock Material Batches • The elements necessary for creating a Calibrated Material Models table were created, and the Calibrated Material Models table was created. In FY25 the existing schema will be deployed on the production enterprise Granta instance on the enterprise secure network. Schema elements will be appended, and new elements created as necessary, to allow the creation of tables specifically to support materials testing, AM process development, and design and analysis for modernization programs.

36 MATERIALS SCIENCE↗

Role of n-phenyl-β-naphthylamine in the Acid-Nitroplasticizer Thermal Aging (ANTA) Experiment

A short-term aging study, which was named as Acid-Nitroplasticizer Thermal Aging (ANTA), was conducted to explore the complex chemistry between n-phenyl-β-naphthylamine (PBNA), HNO x , and nitroplasticizer (NP). Aging of NP with PBNA and acid treatments have demonstrated that PBNA is an effective antioxidant and an anti-hydrolytic agent (e.g., inhibits HNO 3 ) and have allowed the identification of nitroso-PBNA (PBNA-NO). The direct conversion of PBNA to PBNA-NO via scavenging of HONO, known as nitrosation, is a preceding event of PBNA nitration, which provides evidence to the HONO elimination as the key mechanism in the early stage of NP aging. Through the kinetics of both nitrosation and nitration, the accuracy of a prediction on PBNA consumption in NP degradation is further improved.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗

Schema Elements for Granta Annual Report: FY23

Granta: Materials Intelligence (Granta: MI) is a commercial database software distributed by Ansys, Inc. that is utilized by the Nuclear Security Enterprise (NSE) to organize and store relevant materials data. Lack of standard and well-documented database schema is the primary obstacle to an NSE additive manufacturing (AM) database, so the objective of this project is to create and document such a schema.

36 MATERIALS SCIENCE↗