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Title: Metamodeling Time-Temperature Creep Parameters

Journal Article · · Journal of Pressure Vessel Technology
DOI:https://doi.org/10.1115/1.4045887· OSTI ID:1799872
 [1];  [2]
  1. DLH Department of Engineering, Angelo State University, 2601 West Avenue N, San Angelo, TX 76909
  2. Department of Mechanical Engineering, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79902

Abstract There exist many time-temperature parameter (TTP) models for creep rupture prediction of components including the Larson–Miller (LM), Manson–Haferd (MH), Manson–Brown (MB), Orr–Sherby–Dorn (OSD), Manson–Succop (MS), Graham–Walles (GW), Chitty–Duval (CD), Goldhoff–Sherby (GS) models. It remains a challenge to determine which model is “best”, capable of accurate interpolation and physically realistic extrapolation of creep rupture data for a given material. In this study, metamodeling is applied to create a unified TTP metamodel that combines and regresses into twelve TTP models (eight existing and four newly derived). An analysis of the mathematical problems that exist in TTP models is provided. A matlab code is written that can: (1) calibrate the material constants of any of the twelve TTP models (using the metamodel); (2) determine the most suitable stress-parameter function; (3) and report the normalized mean square error (NMSE) of rupture predictions for a given material database. Using the metamodel, and code, a design engineer can make an intelligent selection of the “best” TTP model for creep resistant design. This process is demonstrated using four isotherms of alloy P91 creep rupture data. To assess the influence of material, further validation is performed on alloys Hastelloy X, 304SS, and 316SS. It is determined that the “best” model is dependent on material type and the quality and quantity of available data.

Research Organization:
Univ. of Texas at El Paso, TX (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
DOE Contract Number:
FE0027581
OSTI ID:
1799872
Journal Information:
Journal of Pressure Vessel Technology, Vol. 142, Issue 3; ISSN 0094-9930
Publisher:
ASME
Country of Publication:
United States
Language:
English

References (19)

Application of Manson–Haferd and Larson–Miller Methods in Creep Rupture Property Evaluation of Heat-Resistant Steels journal October 2010
Influence of Data Scattering on Estimation of 100,000 hrs Creep Rupture Strength of Alloy 617 at 700 °C by Larson–Miller Method journal August 2016
On the physical basis of a Larson-Miller constant of 20 journal January 2018
Effect of V and Nb on precipitation behavior and mechanical properties of high Cr steel journal February 2008
Time dependent design curves for a high nitrogen grade of 316LN stainless steel for fast reactor applications journal December 2013
Creep damage and life assessment of thick-walled spherical reactor using Larson–Miller parameter journal March 2017
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A Quarter-Century of Progress in the Development of Correlation and Extrapolation Methods for Creep Rupture Data journal October 1979
Towards the Standardization of Time-Temperature Parameter Usage in Elevated Temperature Data Analysis journal January 1974
The potential for major extrapolation of creep rupture and creep strain data journal March 2014
A recent advance in the assessment of creep rupture data journal June 1999
Unification of the most commonly used time–temperature creep parameters journal March 2011
Design parameters for high temperature creep and the minimum-commitment method journal September 1980
The disparate data problem: The calibration of creep laws across test type and stress, temperature, and time scales journal April 2019
Comparative analysis of the sin-hyperbolic and Kachanov–Rabotnov creep-damage models journal March 2019
New ECCC assessment of creep rupture strength for steel grade X10CrMoVNb9-1 (Grade 91) journal June 2010
On the edge of reality –an evaluation of parametric representations of creep strain and rupture data journal September 2008
Statistical Modeling of Creep Rupture Data journal July 1999
Improvement of long-term creep life extrapolation using a new master curve for Grade 91 steel journal September 2018

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