| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defects and Properties of Cast Metals
|
| Presentation Title |
Systematic Variation of Clustered Porosity through Casting Parameter Modification |
| Author(s) |
Matthew Binkley, Matthew John M Krane, Kevin Trumble |
| On-Site Speaker (Planned) |
Matthew Binkley |
| Abstract Scope |
Solidification shrinkage porosity limits the mechanical properties of most cast alloys. Porosity is typically reported as an average quantity when discussing its impact on mechanical properties, neglecting pore characteristics such as size, shape, and distribution. While correlations have been made using average porosity measurements, a thorough understanding of pore characteristics is required to understand operational limits for parts containing porosity. Rectangular bars of IN 718 (200-mm long x 25 mm wide) were vacuum investment cast to induce systematic variation in porosity amount and distribution. Process variables included bar thickness, taper, localized insulation, and gating restriction. Porosity measurements were performed using bulk immersion density, digital radiography, and quantitative stereology. Direct comparison of 2D radiographic indications with cross-section quantitative stereology was used to determine the actual severity of indications seen in radiographs. The casting parameters above were used to move and modify clustering of porosity, with localized insulation having the largest influence. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Copper / Nickel / Cobalt, |