Title

Extrapolation Techniques for Very Low Cycle Fatigue Behavior of a Ni-base Superalloy

Authors

Authors

B. R. Daubenspeck;A. P. Gordon

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Eng. Mater. Technol.-Trans. ASME

Keywords

very low cycle fatigue; IN738; high-temperature materials; Ni-base; superalloy; PREDICTION; BLADE; LIFE; Engineering, Mechanical; Materials Science, Multidisciplinary

Abstract

A combination of extrapolation and estimation techniques from both prior and current studies has been explored with the goal of developing a method to accurately characterize high-stress amplitude low cycle fatigue of a material commonly used in gas turbine blades with the absence of such data. This paper describes innovative methods used to predict high-temperature fatigue of IN738LC, a dual-phase Ni-base superalloy. Three sets of experimental data at different temperatures are used to evaluate and examine the validity of extrapolation methods such as anchor points and hysteresis energy trends. High-stress amplitude data points approaching the ultimate strength of the material were added to pre-existing base data with limited plastic strain to achieve a full-range data set that could be used to test the legitimacy of the different prediction methods. Each method is evaluated at a number of temperatures. [DOI: 10.1115/1.4003602]

Journal Title

Journal of Engineering Materials and Technology-Transactions of the Asme

Volume

133

Issue/Number

2

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

9

WOS Identifier

WOS:000288807400023

ISSN

0094-4289

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