Materials Algorithms Project
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Data Library MAP_DATA_FAT_NI_MAT

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Provenance of Source Code

H. Fujii, H.K.D.H. Bhadeshia,
Phase Transformations Group,
Department of Materials Science and Metallurgy,
University of Cambridge,
Cambridge, U.K.

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Purpose

Provides data on the fatigue crack growth rate in nickel base superalloys.

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Description

The tar file contains data on the fatigue crack growth rate in nickel base superalloys as a function of 51 variables. File Fatigue.nickel.superalloy.data has the actual data, while Fatigue.nickel.superalloy.info contains an ASCII text version of this explanation.

The data are arranged in columns as follows :-

Column	Data
1	da/dN, the crack growth distance (micrometers) per fatigue cycle.
2	Logarithm to base 10 of da/dN.
3	Stress intensity range in MPa/(sqrt. m).
4	Logarithm to base 10 of the stress intensity range.
5	Temperature in Kelvin.
6, 7	Minimum and Maximum grain size in micrometers.
8	Difference in grain size between major and minor phase.
9, 10, 11	First heat treatment temperature (K), time (hours) and cooling rate (K/s).
12, 13, 14	Second heat treatment temperature (K), time (hours) and cooling rate (K/s).
15, 16, 17	Third heat treatment temperature (K), time (hours) and cooling rate (K/s).
18	Frequency in Hertz.
19	Loading time in seconds.
20	Unloading time in seconds.
21	Load shape.
22	Test atmosphere pressure.
23	"R-ratio", a fatigue parameter.
24	Short or long crack growth (0 or 1).
25	Sample thickness in mm.
26	Yield strength in MPa.
27-53	give concentrations of elements in the nickel, weight percent :-
27-53		Nickel Chromium Cobalt Molybdenum Aluminium Titanium Iron Carbon Boron Zirconium Silicon Niobium Manganese Copper Phosphorus Calcium Magnesium Sulphur Tin Lead Bismuth Silver Tungsten Tantalum Hafmium Rhenium Yttrium Oxide (Y₂O₃)