Modeling Spin Testing Using Location Specific Material Properties
Final rept. 2008-2012
SCIENTIFIC FORMING TECHNOLOGIES CORPORATION COLUMBUS OH
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The work performed focused on incorporating modeling infrastructure into the finite element modeling code DEFORM to analyze disk behavior during spin pit tests using location specific material properties. The effects of residual stresses and local microstructure features from prior thermo-mechanical processing, along with centrifugal forces due to high cyclical rotational speed encountered during spin tests, were analyzed for their impact on permanent disk growth. Constitutive models for coupled grain evolution and precipitation were demonstrated, utilizing in-house models as well as models developed by Northwestern University, based upon the PrecipiCalc precipitation modeling software. Fully-coupled simulations between DEFORM and PrecipiCalc were performed, and evaluated by Ladish Corporation on an industrially relevant disk geometry and heat treatment schedule. Applicable flow stress prediction models were utilized. As a result of this work, DEFORM has been enhanced with improved microstructure prediction capabilities informed by physics-based precipitation codes, and virtual processing and testing models were evaluated by Ladish Corp.
- Numerical Mathematics