1-20 of 338 Search Results for

Catastrophic wear

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Image
Published: 30 August 2021
Fig. 1 Cutting tool failure modes. (a) Characteristic wear and fracture surfaces on cutting tools. (b) Catastrophic failure. (c) Typical wear measurements for a turning tool. VB , flank wear More
Image
Published: 01 January 1989
Fig. 11 Cutting tool failure modes. (a) Characteristic wear and fracture surfaces on cutting tools. (b) Catastrophic failure. (c) Typical wear measurements for a turning tool. VB = flank wear. Source: Ref 9 More
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006423
EISBN: 978-1-62708-192-4
... to the workpiece-die interface. The article describes the most common types and causes of die wear: abrasive wear, adhesive wear, surface fatigue wear, thermal fatigue wear, and catastrophic failure. It concludes with a discussion on the surface treatment and texturing that are used to reduce die wear in drawing...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002120
EISBN: 978-1-62708-188-7
... severe consequences. A wear or catastrophic-failure event could mean loss of the tool, but little damage to the part. However, a final finish cut for this same pocket will change the failure event consequences: Excessive tool wear may result in an unacceptable surface finish or out-of-tolerance...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006357
EISBN: 978-1-62708-192-4
... the transition point between mild wear and severe wear, sudden changes in the planned operating condition (due to sudden changes in external conditions, for example) can easily lead to an unexpected transition into severe wear, leading to unexpected and potentially catastrophic failure of the engineering system...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002177
EISBN: 978-1-62708-188-7
... to be in danger of catastrophic failure. Tool Life or Wear Tests In determining a machinability rating based on tool wear, tests are conducted at one speed on a variety of workpiece materials, utilizing one type of cutting tool material and one geometry. The time or work required to generate a predefined...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
... modes. (a) Characteristic wear and fracture surfaces on cutting tools. (b) Catastrophic failure. (c) Typical wear measurements for a turning tool. VB , flank wear Cutting tools that wear beyond their end-of-life level are considered damaging to the process and represent a failed state...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
... in a manner similar to bearing steels, which is, in fact, one of the reasons for silicon nitride being a good candidate for replacing bearing steels. Other structural ceramics, for example, SiC, typically fail by catastrophic fracture due to their low fracture toughness or severe wear by microfracture...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006064
EISBN: 978-1-62708-175-7
... these materials with very hard, wear-resistant properties, while the matrix of cobalt, or other transition metals, contributes fracture toughness and ductility. Toughness and ductility aid in reducing chipping and catastrophic failure in these industrial tool and wear-resistant materials, which are widely used...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006380
EISBN: 978-1-62708-192-4
... may occur simultaneously. Which processes dominate depends on both the materials involved and the specific sliding contact conditions. Also, the combination of wear processes can change during running-in or in the face of catastrophic failure (wearout). These processes are associated with sliding wear...
Book Chapter

Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006358
EISBN: 978-1-62708-192-4
... Abstract This article discusses the physical signs of rolling-contact wear (RCW). It lists the major considerations in gear design and describes the mechanisms of RCW. The article provides a guide to rolling-contact fatigue (RCF) testing methods. It explains the steps involved in the processes...
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002172
EISBN: 978-1-62708-188-7
... in a narrow band in the primary shear zone, leading to catastrophic shear failure along a shear surface. The surface originates from the tool tip almost parallel to the cutting velocity vector and gradually curves concavely upward until it meets the free surface. In the second stage, a gradual buildup...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006402
EISBN: 978-1-62708-192-4
... of the wear process may occur that can lead to catastrophic damage, that is, failure of the entire system. Fig. 9 Wear-time master curve Tribographs Based on Operational Parameters In addition to the graphs of Fig. 8 and 9 illustrating the time-dependence of friction and wear, tribodata...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003976
EISBN: 978-1-62708-185-6
... treated to relatively low hardnesses. Because of these low hardnesses, their wear resistance is only moderate. However, they are known to possess good resistance to shock loading (such as encountered in hammer forging), heat checking, and catastrophic failure. Because of the generally low tempering...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001320
EISBN: 978-1-62708-170-2
... alone may lead to catastrophic fracture. In addition, the useful life of cutting tools may be limited by a variety of wear processes, such as crater wear, flank wear or abrasive wear, builtup edge, depth-of-cut notching, and thermal cracks ( Fig. 2 ). The origin of the various tool failure mechanisms...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... to the failure examination. durability fatigue gear failures gear strength gears gear-tooth impact stress rupture wear GEARS can fail in many different ways, and except for an increase in noise level and vibration, there is often no indication of difficulty until total failure occurs...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... and chemical degradation and the existence of a stress threshold beyond which catastrophic wear occurs ( Ref 40 ). Impact Wear Testing Two different types of test rigs have been developed for impact wear studies: ballistic impact testers and pivotal hammer testers ( Ref 10 ). The following describes...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
... a lubrication system to ensure long life and to prevent catastrophic failure. For effective lubrication, it is important to understand that the sliding surfaces, nanometer to micrometer level, cannot be perfectly smooth. In addition, inevitable dirt, wear debris, and contaminants in lubricated systems...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002149
EISBN: 978-1-62708-188-7
... Abstract In-process tool monitoring systems can electronically detect excessive tool wear or warn of impending tool failure to lessen machine downtime and prevent the production of out-of-tolerance parts. This article discusses the sensing technology available for manufacturing applications...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
... Abstract Plastics or polymers are used in a variety of engineering and nonengineering applications where they are subjected to surface damage and wear. This article discusses the classification of polymer wear mechanisms based on the methodologies of defining the types of wear. The first...