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friction surfacing

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003030
EISBN: 978-1-62708-200-6
... Abstract Tribology is the science and technology of interacting surfaces in relative motion or, the study of friction, wear, and lubrication. This article focuses on friction and wear processes that aid in the evaluation and selection of materials, for polymers and some composites used in...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005677
EISBN: 978-1-62708-198-6
... smeared deposits on the root surface, and a damaged curette causes heavy scratches. Space closure and canine retraction in continuous arch wire techniques require sufficient force to overcome frictional forces between the bracket attached to the tooth and the arch wire ( Fig 16 ). Excessive wire...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005678
EISBN: 978-1-62708-198-6
..., but it does include the essential feature reversals in motion and hence in surface shear stresses. A six-station pin-on-plate friction and wear machine is shown in Fig. 6 . Fig. 6 Six-station reciprocating pin-on-plate friction and wear machine used to evaluate prosthetic implant materials...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009008
EISBN: 978-1-62708-185-6
... Abstract A cylindrical specimen compressed with friction at the die surfaces does not remain cylindrical in shape but becomes bulged or barreled. Tensile stresses associated with the bulging surface make the upset test a candidate for workability testing. This article discusses test-specimen...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... FRICTION AND WEAR are important when considering the operation and efficiency of components and mechanical systems. The friction between contact surfaces in motion results in wasted energy and generated heat, whereas any type of wear can lead to a degradation in surface quality, unexpected clearances, a...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001282
EISBN: 978-1-62708-170-2
... surface preparation methods and finishing treatments of coated parts. The article also explains the tests to evaluate the coating quality and the effects of coating structures and mechanical properties on coated parts. It concludes with a discussion on the uses of thermal spray coatings. coating...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003187
EISBN: 978-1-62708-199-3
... Abstract Fundamental to the machining process, is the metal-cutting operation, which involves extensive plastic deformation of the work piece ahead of the tool tip, high temperatures, and severe frictional conditions at the interfaces of the tool, chip, and work piece. This article explains...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
... article describes the behavior of oxide scale on the surface of hot metal undergoing thermomechanical processing. It concludes with information on the effects of process and material parameters on interfacial phenomena. deformation metal-forming microforming surface interactions friction...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003043
EISBN: 978-1-62708-200-6
...-frequency vibrating of the materials may dislocate and abrade the fiber structure of the composite. Vibrational bonding Ideal for relatively small, flat parts and some three-dimensional parts. Requires the rapid frictional abrading of the two surfaces to be bonded, which may disrupt the fiber embedded...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003021
EISBN: 978-1-62708-200-6
... process comprises four distinct phases when tie layers are employed. The rapid increase in temperature up to the polymer melting point results from frictional heating at surface asperities and, to a much lesser extent, viscoelastic dissipation. In phase II of the ultrasonic welding process, bulk melting...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003209
EISBN: 978-1-62708-199-3
... alignment and to produce the required length tolerance for a specific set of welding conditions, is not critical. Frictional wear removes irregularities from the joint surfaces and leaves clean, smooth surfaces heated to welding temperature. Ductile metals, aluminum and copper alloys, as well as the...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009007
EISBN: 978-1-62708-185-6
..., and it is uniform throughout the specimen. This is the ideal condition to achieve when the compression test is used to measure the flow stress. When friction is present at the die contact surfaces, bulging occurs, and the strain path curves upward, as shown in Fig. 19 . Fig. 19 (a) Localized...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003979
EISBN: 978-1-62708-185-6
... (webs and ribs) are more difficult to forge because they have more surface area per unit volume. Such variations in shape maximize the effects of friction and temperature changes and therefore influence the final pressure required to fill the die cavities. There is a direct relationship between the...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005668
EISBN: 978-1-62708-198-6
... shown in Fig. 2 . Most modern instruments will record the raw output of the friction force sensor and then recalculate the friction coefficient based on the actual normal load used. Both signals may be recorded. Note in Fig. 2 the common running-in behavior as the two surfaces bed into each other...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003135
EISBN: 978-1-62708-199-3
... 950 °C (1020 to 1740 °F) in a protective atmosphere. Typical sintering times are 30 to 60 min. The sintered parts are typically machined for dimensional accuracy and surface parallelism. The friction elements are usually brazed, welded, riveted, or mechanically fastened to the supporting steel...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009009
EISBN: 978-1-62708-185-6
... 25 . The fundamental difficulties associated with high friction at the platen/specimen interface and barreling of the free surface can be minimized to a large degree in the plane-strain compression test Ref 26 ). Moreover, as Fig. 13 shows, this test is ideally suited for testing sheet or thin...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001236
EISBN: 978-1-62708-170-2
... control of aspects of component performance related to surface topography is required (e.g., wear characteristics, friction, reflectivity, resistance to stress failure, or lubrication properties), roughness is analyzed. If control of some aspect of machine tool performance or component performance (e.g...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005808
EISBN: 978-1-62708-165-8
... 247 CP-Ti (Ti + C) Improved frictional resistance Ref 248 BT9 (Ti 5 Si 3 /NiTi 2 ) Superior load and wear resistance attributed to composite intermetallic (Ti 5 Si 3 /NiTi 2 ) formation Ref 249 BT20 (BT20) Microstructural homogeneity results in enhanced hardness and wear resistance...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001323
EISBN: 978-1-62708-170-2
...) Coefficient of friction 0.16 <0.20 (a) 0.13 0.13 0.25 (a) <0.20 (a) Falex wear rate Good Moderate/poor Excellent Excellent Moderate/poor Good (a) Threshold galling wear Good Moderate/poor Excellent (a) Excellent (a) Good (a) Good (a) Chemical resistance Fair Good...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001306
EISBN: 978-1-62708-170-2
...) Contains free graphite in the microstructure. (d) Optional. (e) Specified carbon ranges are designated by suffix numbers. Most surface treatments are employed to increase surface hardness and/or wear resistance, minimize adhesion (reduce friction), or improve the...