Presentation Title

Niobium Powder Enhanced Copper Composites Through Accumulated Roll Bonding (ARB) Process

Faculty Mentor

Dr. Suveen Mathaudhu

Start Date

18-11-2017 12:30 PM

End Date

18-11-2017 1:30 PM

Location

BSC-Ursa Minor 98

Session

Poster 2

Type of Presentation

Poster

Subject Area

engineering_computer_science

Abstract

The use of copper sheet precursor enhanced with niobium powder has been used to investigate similarities in properties to that of nano-laminar Cu-Nb sheets produced via Severe Plastic Deformation (SPD) with the process of Accumulated Roll Bonding (ARB). Previous experiments using the Accumulated Roll Bonding (ARB) to produce copper-niobium nano-laminar sheets have demonstrated its radiation damage tolerance, thermal stability, and spallation resistant properties. Characterization of niobium powder enhanced copper composite was done using optical microscopy, SEM, and Vickers micro-indentation. To have a comparison of the effects of using Nb powder on copper sheet precursor, Cu-Cu nano-laminar sheets were produced via ARB and were subject to the same conditions and characterizations. Results using micro-indentation have demonstrated a measurable increase in hardness and optical and SEM microscopy images have shown a difference in microstructure to that of pure ARB Cu-Cu.

Summary of research results to be presented

Data was gathered by cutting 4 pieces from each the Cu-Nb composite and the Cu-Cu nano-laminate, each tested for hardness before and after annealing. The annealing was done at 150, 200, 250, and 300 degrees centigrade for 60 minutes for an individual pair of pieces. Meaning that one piece of Cu-Nb and Cu-Cu were annealed at 150 degrees centigrade for an hour while the another set of the same sample of Cu-Nb and Cu-Cu were annealed at 200 degrees centigrade and so on. Samples were subjected to Vickers micro-indentation after the annealing process and then etched to reveal grain size.

The results from the annealing process demonstrated a small but measurable difference in hardness. Initially each of the un-annealed samples of Cu-Nb and Cu-Cu were measured on average 128.6 hv and 115.1 hv respectively. After annealing at 300 degrees centigrade for 60 minutes the hardness of the Cu-Nb and Cu-Cu were measured on average 71.2 hv and 69.5 hv respectively.

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Nov 18th, 12:30 PM Nov 18th, 1:30 PM

Niobium Powder Enhanced Copper Composites Through Accumulated Roll Bonding (ARB) Process

BSC-Ursa Minor 98

The use of copper sheet precursor enhanced with niobium powder has been used to investigate similarities in properties to that of nano-laminar Cu-Nb sheets produced via Severe Plastic Deformation (SPD) with the process of Accumulated Roll Bonding (ARB). Previous experiments using the Accumulated Roll Bonding (ARB) to produce copper-niobium nano-laminar sheets have demonstrated its radiation damage tolerance, thermal stability, and spallation resistant properties. Characterization of niobium powder enhanced copper composite was done using optical microscopy, SEM, and Vickers micro-indentation. To have a comparison of the effects of using Nb powder on copper sheet precursor, Cu-Cu nano-laminar sheets were produced via ARB and were subject to the same conditions and characterizations. Results using micro-indentation have demonstrated a measurable increase in hardness and optical and SEM microscopy images have shown a difference in microstructure to that of pure ARB Cu-Cu.