국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Microstructure Modeling of 3rd Generation Disk Alloys
저자	Jou, Herng-Jeng
Keyword	COMPUTERIZED SIMULATION;; GAS TURBINES;; GRAIN BOUNDARIES;; HEAT RESISTANT ALLOYS;; HEAT TREATMENT;; MOBILITY;; NUCLEATION;; PRECIPITATES;; SIMULATION;; SURFACE ENERGY
URL	http://hdl.handle.net/2060/20100012180
보고서번호	NASA/CR-2010-216229
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	The objective of this program is to model, validate, and predict the precipitation microstructure evolution, using PrecipiCalc (QuesTek Innovations LLC) software, for 3rd generation Ni-based gas turbine disc superalloys during processing and service, with a set of logical and consistent experiments and characterizations. Furthermore, within this program, the originally research-oriented microstructure simulation tool will be further improved and implemented to be a useful and user-friendly engineering tool. In this report, the key accomplishment achieved during the second year 񢉘) of the program is summarized. The activities of this year include final selection of multicomponent thermodynamics and mobility databases, precipitate surface energy determination from nucleation experiment, multiscale comparison of predicted versus measured intragrain precipitation microstructure in quench samples showing good agreement, isothermal coarsening experiment and interaction of grain boundary and intergrain precipitates, primary microstructure of subsolvus treatment, and finally the software implementation plan for the third year of the project. In the following year, the calibrated models and simulation tools will be validated against an independently developed experimental data set, with actual disc heat treatment process conditions. Furthermore, software integration and implementation will be developed to provide material engineers valuable information in order to optimize the processing of the 3rd generation gas turbine disc alloys.