Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Local Microstructure and Hardness Variation After Pulsed Laser Micromelting on S7 Tool Steel J. Micro Nano-Manuf. 2016;4(3):031006-031006-10. doi:10.1115/1.4033924 Figure Legend: Diagrams of (a) unidirectional and zig-zag scan paths and (b) the laser spot overlapping typical in creating PLμM lines and areas

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Local Microstructure and Hardness Variation After Pulsed Laser Micromelting on S7 Tool Steel J. Micro Nano-Manuf. 2016;4(3):031006-031006-10. doi:10.1115/1.4033924 Figure Legend: (a) A typical load versus displacement (P versus h) curve, (b) SEM micrograph of a single indent, and (c) diagram of the hardness (H) mapping method on a mock dataset where each data point represents an individual indent

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Local Microstructure and Hardness Variation After Pulsed Laser Micromelting on S7 Tool Steel J. Micro Nano-Manuf. 2016;4(3):031006-031006-10. doi:10.1115/1.4033924 Figure Legend: Scanning electron micrographs of (a) a PLμM spot, (b) line, and (c) area. The left side image shows the resulting surface topography and the right side shows the underlying microstructure. Inset images show (d) the edge of a laser spot and ((e) and (f)) carbide formation in an overlap region of a PLμM area scan.

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Local Microstructure and Hardness Variation After Pulsed Laser Micromelting on S7 Tool Steel J. Micro Nano-Manuf. 2016;4(3):031006-031006-10. doi:10.1115/1.4033924 Figure Legend: The hardness as a function of indentation depth plots for the (a) laser spots, (b) laser lines, and (c) laser areas. Indents that had a depth exceeding the calibrated range (i.e., hc > 230 nm) are included in gray. Each figure has an inset histogram showing the distribution: The measured hardness of the laser lines and area showed a unimodal distribution while the laser spots showed a trimodal distribution in the hardness, as shown in the inset histogram. SEM evaluation (d) of eight laser spots showed that the indentation placement on laser spots was often near the melt pool edge and occasionally missed the spots entirely.

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Local Microstructure and Hardness Variation After Pulsed Laser Micromelting on S7 Tool Steel J. Micro Nano-Manuf. 2016;4(3):031006-031006-10. doi:10.1115/1.4033924 Figure Legend: Secondary electron micrographs of etched S7 steel: (a) as-received (annealed) and (b) furnace hardened

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Local Microstructure and Hardness Variation After Pulsed Laser Micromelting on S7 Tool Steel J. Micro Nano-Manuf. 2016;4(3):031006-031006-10. doi:10.1115/1.4033924 Figure Legend: Microstructure and hardness of condition showing the correlation between local back-tempering and hardness change: (a) A, (b) B then A, (c) A then B, and (d) B. The tempered overlap regions are indicated with arrows in (b). Hardness ranges (mean ± 1 standard deviation) of the furnace hardened and annealed surfaces are also included as gray boxes for reference.