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Title: Multiaxial Creep-Fatigue and Creep-Ratcheting Failures of Grade 91 and Haynes 230 Alloys Toward Addressing Design Issues of Gen IV Nuclear Power Plants

The proposed research will develop systematic sets of uniaxial and multiaxial experimental data at a very high temperature (850-950°C) for Alloy 617. The loading histories to be prescribed in the experiments will induce creep-fatigue and creep-ratcheting failure mechanisms. These experimental responses will be scrutinized in order to quantify the influences of temperature and creep on fatigue and ratcheting failures. A unified constitutive model (UCM) will be developed and validated against these experimental responses. The improved UCM will be incorporated into the widely used finite element commercial software packages ANSYS. The modified ANSYS will be validated so that it can be used for evaluating the very high temperature ASME-NH design-by-analysis methodology for Alloy 617 and thereby addressing the ASME-NH design code issues.
Authors:
 [1] ;  [2] ;  [3]
  1. North Carolina State Univ., Raleigh, NC (United States)
  2. Penn State Univ., University Park, PA (United States)
  3. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
OSTI Identifier:
1178428
Report Number(s):
DOE/NEUP--09-832
09-832; TRN: US1500354
DOE Contract Number:
AC07-05ID14517
Resource Type:
Technical Report
Research Org:
North Carolina State Univ., Raleigh, NC (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE). Nuclear Energy University Programs (NEUP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CREEP; NUCLEAR POWER PLANTS; FATIGUE; RATCHETING; TEMPERATURE RANGE 1000-4000 K; FINITE ELEMENT METHOD; DESIGN; FAILURES; A CODES; TEMPERATURE DEPENDENCE; HAYNES ALLOYS; INCONEL 617; DYNAMIC LOADS