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Keywords: surface roughness
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2022
ISBN: 978-0-8031-7721-5
... Additively manufactured surface roughness is an inherent aspect of the process that is known to influence especially the fatigue performance of additively manufactured parts. Postprocessing is often used to improve the surface, but this is not always possible with complex shaped parts...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2022
ISBN: 978-0-8031-7721-5
... The effects of stress gradient resulting from a different type of loading condition (i.e., rotating-bending [R-B] versus axial), specimen (i.e., hourglass for R-B versus round with straight gage section for axial), and surface roughness on the fatigue behavior of 17-4 precipitation hardening...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2020
ISBN: 978-0-8031-7708-6
.... additive manufacturing metal powder bed fusion surface roughness surface texture surface measurement parameters contact stylus profilometry focus variation laser confocal microscopy coherence scanning interferometry surface finishing STRUCTURAL INTEGRITY OF ADDITIVE MANUFACTURED MATERIALS...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2020
ISBN: 978-0-8031-7686-7
.... No statistical difference was found on the average surface roughness for samples printed in the vertical direction (7.26 μm Ra, and 47.90 μm Rz), regardless of the argon flow used. For the horizontal direction, however, the optimized flow showed a smoother surface finish (6.48 μm Ra, 39.46 μm Rz) compared...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2020
ISBN: 978-0-8031-7686-7
... loading conditions is lacking. Fatigue performance is largely driven by defects in the material, such as porosity and surface roughness. AM process optimization often is completed through trial-and-error iterations misguided by average values to characterize defects that do not capture the fatigue...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7597-6
... of the plates. The ultimate tensile strength values obtained from the specimens finished using method 3 were 645 MPa (standard deviation of 16 MPa) for the 15-mm-thick plates. The area reduction of the 15-mm-thick plates was 0.76 in natural strain. sheet tensile specimens surface roughness surface...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2007
ISBN-10: 0-8031-3406-1
ISBN: 978-0-8031-3406-5
... performed concerning the FRP-concrete interface bond relative to three surface-roughness grades: low - (<10 μm), moderate - (≈ 10–50 μm), and high - (>50 μm), to establish the optimal formation for bonding. By use of the SCCB approach, Mode I critical strain energy release rate results are measured...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2004
ISBN-10: 0-8031-3482-7
ISBN: 978-0-8031-3482-9
... of these issues and discusses latest trends in floor safety. Portable Slip Floor Slip-resistance Coefficient of Friction James Machine Pendulum Tortus Ramp Sellmaier Brungraber English Surtronic Surface Roughness Dynamometer Paul F. Lewis~ Portable Slip Testers Reference: Lewis, Paul F...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2002
ISBN-10: 0-8031-2896-7
ISBN: 978-0-8031-2896-5
...”, the oldest of these dates to December 1940. The appearance of these and other 1940, 1950, and 1960 vintage specimens was documented in early 2001. The performance of various test specimens are reviewed, and in some cases compared with that reported previously. Gloss and surface roughness measurements were...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2867-3
ISBN: 978-0-8031-2867-5
... and many kinds of atmosphere. The test has been carried out in a refrigerant atmosphere. mixed lubrication boundary friction surface roughness refrigerant refrigeration oil block-on-ring friction tester Shinji TanakaJ Tsunamitsu Nakahara,l Keiji KyogokuJ and Satoshi MomozonC Identification...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2883-5
ISBN: 978-0-8031-2883-5
... data, measured through a surface roughness meter, to establish a good index for evaluating cavitation erosion development on the surface, as well as the intensity of the cavitation attack. According to the index, the incubation period of cavitation erosion is to be divided into two periods...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2883-5
ISBN: 978-0-8031-2883-5
... The paper deals with the tribology of surface roughness effects in rapidly moving hydraulic units, such as pumps, motors and seals. The emphasis is on laminar flow, turbulence effects being only briefly discussed. The analysis is based on lubrication theory that was originally developed...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2872-X
ISBN: 978-0-8031-2872-9
... test results. It was found that the model successfully predicts the retained strength of CFCCs resulting from net-shape machining over a large range in surface quality. ceramic composite surface roughness notch effect stress concentration Mamidala Ramulu, 1 Michael G. Jenkins,2 and Sawalee...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2608-5
ISBN: 978-0-8031-2608-4
... and the solution-treated conditions. All specimens were polished with a surface roughness in the range of 0.01–0.02 μm. The clearance in diameter between the convex and the concave specimens was 100 or 300 μm. The same test conditions were applied to all specimens. Results showed that the best alloy couple...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
ISBN-10: 0-8031-2485-6
ISBN: 978-0-8031-2485-1
...: coiled tubing, low-cycle fatigue, tubular materials, surface effects, tube rolling, surface roughness, surface defects Coiled tubing is used in the petroleum industry to perform a wide variety of production and well service operations, from drilling to logging[l]. Long strings of continuous tubing (up...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2033-8
ISBN: 978-0-8031-2033-4
... on the fiber orientation. continuous-fiber ceramic composites abrasive waterjets machining edge finishing fiber direction surface roughness bending fracture erosion delamination M. Ramulu, 1 N. Eswara Prasad, 2 G. Malakondaiah, 2 and Z. Guo I SECONDARY PROCESSING EFFECTS AND DAMAGE MECHANISMS...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1995
ISBN-10: 0-8031-2014-1
ISBN: 978-0-8031-2014-3
... alloy surface roughness doctor blade drip-dry-wipe (DDW) David F. Bowers I DDW TESTING OF THERMAL SPRAY COATINGS REFERENCE: Bowers, D.F., "DDW Testing of Thermal Spray Coatings," Cyclic Cabinet Corrosion Testing, ASTM STP 1238, Gardner S. Haynes, Ed., American Society for Testing and Materials...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-1894-5
ISBN: 978-0-8031-1894-2
... and a stress ratio of 0.1. The results are summarized in terms of characterization and quantification of any particulates generated, and surface topographical changes on both head and taper contact surfaces. fatigue fretting Ringer's solution wear alumina surface roughness scanning electron...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-4478-4
ISBN: 978-0-8031-4478-1
... grinding ion assisted deposition ion beam sputtering low scatter microstructure mirrors polishing reaction bonded silicon carbide silicon silicon carbide surface roughness Manuscript received 3-2-90 Low Scatter Surfaces on Silicon Carbide Roger A. Paquin and Matthew B. Magida Hughes Danbury...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-4479-2
ISBN: 978-0-8031-4479-8
.... gradient refractive index porous dielectric AR coating damage threshold quartz mixed thin film surface roughness Manuscript Received 10-29-85 Highly Damage Resistant Porous D i e l e c t r i c Coating for High Power Lasers in the U l t r a v i o l e t to Near-infrared Wavelength Region K. Yoshida...