Project No: FE0011796
Performer: Purdue University


Contacts

Duration
Award Date:  10/01/2013
Project Date:  09/30/2016

Cost
DOE Share: $500,000.00
Performer Share: $160,557.00
Total Award Value: $660,557.00

Performer website: Purdue University - http://www.purdue.edu/

Advanced Energy Systems - Hydrogen Turbines

New Mechanistic Models of Creep-Fatigue Interactions for Gas Turbine Components

Project Description

The objective of this Purdue University project is to develop novel tools to predict creep-fatigue crack growth in nickel-based gas turbine alloys for stationary power applications by employing a framework of irreversible cohesive zone models (ICZM) together with a viscoplastic strain gradient (VPSG) continuum formulation. The present work investigates alloy IN 718. The ultimate goal is to create and validate a robust, multi-scale, mechanism-based model that quantitatively predicts creep-fatigue crack growth and failure in nickel-based gas turbine alloy IN 718. A successful model could be embedded into standard finite element software as an add-on analysis tool for gas turbine designers and thus greatly improve their capability to design safe gas turbines without excessive and costly over-design or unsafe under-design.


Program Background and Project Benefits

This project will develop novel tools to predict creep-fatigue crack growth in nickel-based gas turbine alloys for stationary power applications. Incorporation of this new model into existing product life cycle management approaches at NETL has significant potential to reduce turbine manufacturing costs and maintenance costs through increased blade life, leading to lower plant costs and lower electricity costs. Specifically, this project will create and validate a robust, multi-scale, mechanism-based model that quantitatively predicts creep-fatigue crack growth and failure in the nickel-based gas turbine alloy IN 718.