Design, Analysis and Processing of Functionally Graded Structural Materials
Final rept. 1 Jun 1996-31 May 2001
CLEMSON UNIV SC DEPT OF MECHANICAL ENGINEERING
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A multi-length scale computational methodology is developed to analyze processingmicrostructure and microstructurepropertiesperformance relationship in advanced structural materials. Such methodology is based on combining scientific and engineering disciplines of fluid mechanics, heat transfer, chemical gassurface thermodynamics and kinetics, atomistic modeling techniques, stochastic microstructure evolution simulation methods, nonlinear fracture and singular stress analysis, and micro-mechanics analytical and computational approaches. This methodology is then applied to advanced coating and functionally graded materials processed by the chemical vapor deposition CVD and the Laser Engineered Net Shaping LENSTrademark processes. The methodology allows the establishment of direct links between process parameters temperature, pressure, flow rates, laser rastering velocity, etc., the resulting materials microstructure grain size and distribution, morphological and crystallographic texture, etc. and properties strength, strain-to-fracture, etc.. in response to the computational challenges of multi-length scale modeling, parallel computing is utilized and a highly-efficient inter-processor communications method is developed which substantially reduces the simulation time.
- Metallurgy and Metallography