Understanding Phase and Interfacial Effects of Spall Fracture in Additively Manufactured Ti-5Al-5V-5Mo-3Cr

Technical Report · Sat Oct 01 00:00:00 EDT 2022

DOI:https://doi.org/10.2172/1892129· OSTI ID:1892129

Branch, Brittany A. ^[1]; Ruggles, Timothy ^[1]; Miers, John Carter ^[1]; Massey, Caroline ^[1]; Moore, David G. ^[1]; Brown, Nathan ^[1]; Duwal, Sakun ^[1]; Silling, Stewart A. ^[1]; Mitchell, John A. ^[1]; Specht, Paul E. ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Additive manufactured Ti-5Al-5V-5Mo-3Cr (Ti-5553) is being considered as an AM repair material for engineering applications because of its superior strength properties compared to other titanium alloys. Here, we describe the failure mechanisms observed through computed tomography, electron backscatter diffraction (EBSD), and scanning electron microscopy (SEM) of spall damage as a result of tensile failure in as-built and annealed Ti-5553. We also investigate the phase stability in native powder, as-built and annealed Ti-5553 through diamond anvil cell (DAC) and ramp compression experiments. We then explore the effect of tensile loading on a sample containing an interface between a Ti-6Al-V4 (Ti-64) baseplate and additively manufactured Ti-5553 layer. Post-mortem materials characterization showed spallation occurred in regions of initial porosity and the interface provides a nucleation site for spall damage below the spall strength of Ti-5553. Preliminary peridynamics modeling of the dynamic experiments is described. Finally, we discuss further development of Stochastic Parallel PARticle Kinteic Simulator (SPPARKS) Monte Carlo (MC) capabilities to include the integration of alpha (α)-phase and microstructural simulations for this multiphase titanium alloy.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Contributing Organization: Additive Coordination Team (ACT)
• DOE Contract Number: NA0003525
• OSTI ID: 1892129
• Report Number(s): SAND2022-14061; 710856
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE