READ ME File For 'Dataset in support of the PhD project 'Microstructural engineering for enhanced fatigue performance using laser powder bed fusion''

Dataset DOI: https://doi.org/10.5258/SOTON/D2627

ReadMe Author: Anqi Liang, University of Southampton, ORCID ID: 0000-0001-6574-5220

This dataset supports the thesis entitled 'Microstructural engineering for enhanced fatigue performance using laser powder bed fusion'
AWARDED BY: Univeristy of Southampton
DATE OF AWARD: 2023

This dataset contains:
Microsoft Excel file with the original data of plots in the thesis.
Origin software used to create graphs.

The dataset for figures are as follows:
Figure 4-3 (a) Average width and (b) depth of single laser scan tracks with different linear energy densities and laser powers. 
Figure 4-5 Cell size of single laser scan tracks with different linear energy density and laser power. The range in measurements was up to 26.9%.
Figure 4-7 Predicted and measured depths of melt pools from single laser scans as a function of the linear energy density, P/v. 
Figure 4-8 Cooling rate, G×R, expressed as a function of the linear energy density, P/v.
Figure 4-9 The experimentally measured cell size obtained with CL M2 printer and calculated cell size based on empirical equations.
Figure 4-10 Density of five cubes produced via different processing parameters measured by both Archimedes method and optical microscopy.
Figure 4-12 Cell size for five cubes processed using parameter A1–A5, as indicated. Error bars bound one standard deviation.
Figure 4-14 Optical micrograph measurements of local density at regions with 20 layers of rescanning in specimen A+B1, A+B2, A+B3 and A+B4.
Figure 4-17 Measured and predicted cell sizes for both initial scanning and rescanning regions using parameter A+B1, A+B2, A+B3, A+B4. 
Figure 5-5 Micrographs showing pore morphology and histograms of pore area and circularity for single material (a) 316L SS and (b) 15-5PH SS. 
Figure 5-6 Pore circularity versus the pore area of single material 316L SS and 15-5PH SS.
Figure 5-8 (b and g) Grain size and aspect ratio of single-material 316L SS and 15-5PH SS.
Figure 5-9 Representative engineering tensile stress-strain curves and tensile properties of LPBF single-material 316L SS and 15-5PH SS.
Figure 5-11 Optical micrographs showing defects in 316L SS15-5PH SS bimaterials. (a) Stitched images of the entire as-polished cross-section. 
Figure 5-14 Element distribution of nickel (Ni) and copper (Cu) at various locations along the 316L SS/15-5PH SS bimaterial interface from EDS line scan. 
Figure 5-15 (b and f) Grain size and aspect ratio of far-interface 316L and 15-5PH SS layers.
Figure 5-16 (f) Grain size and aspect ratio of 15-5PH SS layer.
Figure 5-18 Vickers hardness distribution of LPBF bimaterials at varying perpendicular distances from the interface.
Figure 6-1 Contour-cut residual stress maps of (a) single material 316L SS and (b) 316L SS/15-5PH SS bimaterial. Building direction (BD) is indicated by an arrow.
Figure 6-2 (a) Crack growth rate (dadN) versus the stress intensity factor range (dK).
Figure 6-4 (a) Crack growth rate versus the crack length.
Figure 6-6 Values of the J-integral at different distances of the crack tip to a bimaterial interface as a crack extends from 316L SS to 15-5PH SS.
Figure 6-7 (a) Crack growth rate (da/dN) vs. the stress intensity factor rage (dK).
Figure 6-9 (a) Crack growth rate (da/dN) vs. the stress intensity factor rage (dK).
Figure 6-11 (a) Crack growth rate (da/dN) vs. distances from crack tip to interface (d).

Date of data collection: Nov 2018 to Nov 2022

Information about geographic location of data collection: 
University of Southampton, UK.

Related projects:
Microstructural engineering for enhanced fatigue performance using laser powder bed fusion

Related publication:
https://doi.org/10.1016/j.jmatprotec.2022.117493
https://doi.org/10.1016/j.matchar.2023.112719

Date that the file was created: May 2023