DOI: 10.5258/soton/d2722
title: Dataset to support the article 'Fatigue crack growth behaviour and life prediction following a lifetime extension strategy in the low-cycle fatigue regime for FV566 turbine blade steel'

description: This dataset contains:
The Excel spreadsheet file containing the results that were used to create the graphs in the paper. 
The .mp4 file M08_7_Crack_evolution - Short crack growth evolution on the shot peened notch after an extension strategy
The .mp4 file M08_9_Crack_evolution - Short crack growth evolution on the shot peened notch after an extension strategy with overloads

The figures are as follows:

Fig. 4 Short crack data obtained by observing and measuring cracks using microscopy. Note all the data inlcudes arrested crack growth for representative comparison.

Fig. 5A-B The total number of initiation and total number of coalescence events which formed the primary crack only, versus the lifetime percentage for two samples subjected to the lifetime extension strategy.

Fig. 5C The measurement for each crack on each replica in micrometers for the constant amplitude loading sample subjected to the lifetime extension strategy. All measurements were converted into the lengths used for application in Microsoft powerpoint. The location of each crack is also inlcuded in this data. 

Fig. 5D The measurement for each crack on each replica in micrometers for the sample subjected to overloads with OLR of 1.56 every 150 baseload cycles and the lifetime extension strategy. All measurements were converted into the lengths used for application in Microsoft powerpoint. The location of each crack is also inlcuded in this data.

Fig. 6A The total number of cracks (initiation events minus coalescence events) for two samples subjected to the lifetime extension strategy for each replica record.

Fig. 6B The total number of cracks (initiation events minus coalescence events) for samples with various loading and surafce conditions taken from the replica records.

Fig. 7 Number of cycles to failure versus strain range at the notch surafce in % for polished, shot peened and samples subjected to the lifetime extension strategy.

Fig. 8 The cycles to failure versus strain range separated into eleastic, plastic and total strain range at the notch surface for polished and shot peened samples, with the equivalent Coffin-Manson curves calculated based upon the lifetime data obtained. 

Fig. 9 The difference between the shot peened and polished prediction using the Coffin-Manson constants obtained as lifetime extension from shot peening. The theoretical lifetime extension from shot peening based upon the Coffin-Manson prediction versus percentage lifetime is also shown. 

Fig. 11 The average lifetime of samples with various surface and loading conditions, split into three main phases of lifetime (Initiation, short crack and remaining life). 

Fig. 12 The average lifetime of samples with various surface/loading conditions compared with the lifetime extension strategy prediction and experimental results from samples subjected to the lifetime extension strategy.

Fig. 13 The predicted life versus the lifetime found through experimentation for polished, shot peened samples, and samples subjected to the lifetime extension strategy.