Title

Extrapolation Techniques For Very Low Cycle Fatigue Behavior Of A Ni-Base Superalloy

Keywords

high-temperature materials; IN738; Ni-base superalloy; very low cycle fatigue

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. © 2011 American Society of Mechanical Engineers.

Publication Date

4-5-2011

Publication Title

Journal of Engineering Materials and Technology, Transactions of the ASME

Volume

133

Issue

2

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1115/1.4003602

Socpus ID

79953253850 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79953253850

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