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laser dimpling

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Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006421
EISBN: 978-1-62708-192-4
..., and laser-based design approaches such as laser patterning and dimpling. Laser-surface modification of novel materials, such as high-entropy alloys and metallic glasses, is explored. The article provides an overview of hybrid techniques involving laser as a secondary tool, as well as a discussion...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006365
EISBN: 978-1-62708-192-4
... parameters, it is possible to very accurately control the diameter, depth, and area density of microdimples ( Ref 46 ). Each laser pulse delivered to the surface causes sublimation, melting, and vaporization, resulting in dimple formation. However, because of the high intensity of the laser beam pulse...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003536
EISBN: 978-1-62708-180-1
... for SEM fractography. Fractography by SEM is particularly useful for quantitative characterization of specific features (for example, dimples, striations, pores, facets, inclusions, etc.) present in the fracture surface ( Ref 35 , 36 ). The features of interest are characterized via estimation...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000623
EISBN: 978-1-62708-181-8
..., 110× Fig. 1142 Higher-magnification view of the fracture surface in Fig. 1141 , typical of fractures produced in this alloy in air after various solution treatments. Entire surface shows dimpled fracture of fine, equiaxed α phase that ruptured in ductile shear. SEM, 1100× Fig. 1143...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000621
EISBN: 978-1-62708-181-8
..., with some regions that appear to show clusters of minute dimples (A) and other regions that strongly resemble intergranular fracture (B's). At C is one of the numerous vertical fissures visible in Fig. 1005 , presumably elongated during tension overload. See Fig. 1007 for a higher-magnification view...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002404
EISBN: 978-1-62708-193-1
... depends on the effectiveness of solution annealing in removing plastic deformation introduced during thermomechanical processing. Retention of 1 to 2% cold work is sufficient to restrict plastic deformation during the fracture process. Figures 4 and 5 compare the inclusion and dimple morphologies...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
...) Microvoids (dimples) elongated in direction of loading Single crack with no branching Surface slip band emergence Cleavage or intergranular fracture Origin area may contain an imperfection or stress concentrator Progressive zone: worn appearance, flat, may show striations...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005146
EISBN: 978-1-62708-186-3
.... Shearing can cause cracks at the edges of some titanium sheet thicker than 2.0 mm (0.080 in.). If cracks or other irregularities develop in a critical portion of the workpiece, an alternative method of cutting should be used, such as band sawing, abrasive waterjet cutting, or laser cutting (see...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000609
EISBN: 978-1-62708-181-8
.... alloy steel fatigue crack propagation fractograph inclusions intergranular fracture pressure vessels Fig. 573, 574, 575 Solidification cracking in laser-beam weldments of ASTM A372, class 6 (HY-80). Laser welds in 13-mm (0.5-in) thick plate were made at a travel speed of 13 mm/s (30 in./min...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006427
EISBN: 978-1-62708-192-4
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005129
EISBN: 978-1-62708-186-3
... of steel tailor-welded blanks. Other product factors and process considerations are discussed in more detail in Ref 1 . Welding Methods for Tailored Blanks The types of welds that are used or have been considered for tailor-welded blanks include: Laser Resistance mash seam High...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002492
EISBN: 978-1-62708-194-8
... occur. The cutting of plies can be automated to increase efficiency and quality. Techniques include water jets, lasers, reciprocating knife, and die cutting. Using these methods, intricate plies can be cut with repeatability with no limitation on orientation of the reinforcement. A water jet...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005100
EISBN: 978-1-62708-186-3
...-diaphragm hydroforming (fluid cell forming or fluid forming) Shallow recessing  Dimpling  Drop hammer forming  Electromagnetic forming  Explosive forming  Joggling Source: Ref 3 Process-Related Developments During the last decade, a number of processes have been...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003395
EISBN: 978-1-62708-195-5
... be taken to sort the individual plies and to ensure that each ply is laid down in the correct sequence. It is also important that the sensitivity to a given angle is not greater than ±3°. Mylar templates or lasers often are used to indicate on the tool the location and orientation of each successive layer...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005657
EISBN: 978-1-62708-198-6
... morphology (also known as ductile dimples). Microvoid shape and orientation can provide clues about the fracture origin location, as well as the stresses that caused the fracture ( Fig. 3 ). Ductile overload fracture that occurred from uniaxial tension forms equiaxed microvoids (dimples), as shown in Fig. 4...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005535
EISBN: 978-1-62708-197-9
... process where an object is scanned with a laser or a coordinate measuring system to produce a point cloud. The point cloud is most useful when it follows certain rules, such as the points being arranged in horizontal rows with equal numbers of points in each row ( Fig. 25 ). Fig. 25 Surface...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... at specific locations on a build platform or part. The materials in the AM jetting processes involved controlled deposition of curable polymers or atomized melt (material jetting) or powder deposition with binder resins (binder jetting). Other AM technologies emerged with the development of selective laser...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006559
EISBN: 978-1-62708-290-7
...Wavelengths of various laser types Table 1 Wavelengths of various laser types Laser type Wavelength, nm Nd:YAG 1064 CO 2 10,600 Excimer 191–351 Ti:sapphire 735–1053 Fiber laser 1000–2200 Source: Ref 4 Elemental detection results of original...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006378
EISBN: 978-1-62708-192-4
.... This last remedy has been accomplished by local laser treatment, induction or flame hardening of the blade material, by brazed-on shields of Stellite, or, in some cases, by shields of tool steel or weld-deposited hardfacing. The evaluation and prediction of steam turbine blade erosion is very complex...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001287
EISBN: 978-1-62708-170-2
... and are available in the form of boats, canoes, dimpled surfaces, crucibles, and so on ( Ref 56 ). Typical refractory metals used for containers are tungsten, molybdenum, and tantalum, as well as refractory metal alloys such as TZM (titanium and zirconium added to molybdenum for improved high-temperature strength...