New Mechanistic Models of Long Term Evolution of Microstructure and Mechanical Properties of Nickel Based Alloys


Schematic representation of the proposed<br/>DEM model. Crystal grains will be represented<br/>using discrete elements that interact and move<br/>to allow deformation and microstructure evolution.<br/>The element interaction laws will be defined to<br/>represent the physical mechanisms involved for<br/>nickel based alloys
Schematic representation of the proposed
DEM model. Crystal grains will be represented
using discrete elements that interact and move
to allow deformation and microstructure evolution.
The element interaction laws will be defined to
represent the physical mechanisms involved for
nickel based alloys
Oregon State University
Website:  Oregon State University
Award Number:  FE0024065
Project Duration:  01/01/2015 – 12/31/2017
Total Award Value:  $624,999
DOE Share:  $499,998
Performer Share:  $125,001
Technology Area:  Coal Utilization Science
Key Technology:  High Performance Materials
Location:  Corvallis, Oregon

Project Description

The goal of the project is to create and validate a robust, multiscale, mechanism-based model that quantitatively predicts long term evolution of microstructure for nickel-based alloys, and the effect on mechanical properties such as creep and rupture strength, including variable cyclic operating conditions. This is a fresh approach to simulating long term material response that embeds established mechanistic understanding within a discrete element method (DEM) model framework to create a predictive system with a sound mechanistic foundation.

Project Benefits

Mechanism-based modeling has the potential to simulate long scale behavior (10–30 years) based on shorter time data (diffusion constants, activation energies, etc.), achieving more confidence for long-term life, safer and more cost efficient designs, better ability to predict variable operating conditions, and extended service live beyond initial assumptions. A successful model could be embedded into standard design software as an add-on analysis tool for fossil energy system designers that will greatly improve their capability to design safe energy systems without excessive and costly over-design or unsafe under-design.

Contact Information

Federal Project Manager 
Richard Dunst:
Technology Manager 
Briggs White:
Principal Investigator 
Jamie Kruzic:

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