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

    Authors

    B. R. Daubenspeck;A. P. Gordon

    Comments

    Authors: contact us about adding a copy of your work at [email protected]

    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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