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abnormal wear pattern

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270092
EISBN: 978-1-62708-301-0
.... Part of the fracture surface had been cut for earlier investigations elsewhere. Figure CH13.4 shows a sketch of the broken piston. Fig. CH13.4 Sketch showing the fracture pattern of the failed piston The other six pistons and their respective slipper pads did not show any abnormalities...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630001
EISBN: 978-1-62708-270-9
... suddenly loses its ability to carry its intended load. Distortion, wear, and corrosion failures also are important and sometimes lead to fractures. However, these types of failure can be reasonably well predicted and prevented. Reference 1 is a basic guide to follow in various stages of a failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270074
EISBN: 978-1-62708-301-0
..., causing adhesive wear and the welding of slipper pad material onto the surface of a mating cam plate. Excessive friction between the slipper pads and cam plate, in turn, created a torsional overload that caused the camshaft to break. The chapter presents SEM images showing the wear pattern on one...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270025
EISBN: 978-1-62708-301-0
... Abstract This chapter provides an overview of the tools and techniques used to examine failure specimens and the wealth of information that can be obtained from fracture surfaces, cracks, wear patterns, and other such features. It discusses the use of metallography, fractography, and optical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180151
EISBN: 978-1-62708-256-3
... mounted or unmounted specimens can be used. It is frequently desirable to make acetate tape replicas or room-temperature-vulcanizing (RTV) rubber replicas of fracture surfaces or of wear patterns of large parts during an on-site failure analysis. As described in this appendix, several replicas should...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270019
EISBN: 978-1-62708-301-0
... Ad hoc modifications Information about the failure itself includes: Date and time of failure/malfunction Extent of damage to the surrounding structure, personnel, etc. Operating conditions just prior to failure Service abnormalities Sketches and photographs of the failed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610549
EISBN: 978-1-62708-303-4
... in the case of a large-scale accident scene. It is also frequently desirable to make acetate tape replicas or room-temperature vulcanized (RTV) rubber replicas of fracture surfaces or of wear patterns of large parts during an on-site failure analysis. Several replicas should be made of the fracture origin...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630081
EISBN: 978-1-62708-270-9
...). These terms, brittle and ductile , are opposites, like black and white. For many parts it is desirable to have metal properties that are predominantly hard, strong, and wear resistant, accepting the accompanying brittleness. Examples are gear teeth, antifriction bearings, and various types of cutting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050245
EISBN: 978-1-62708-311-9
... Depth , Heat Treat. Prog. , June 2000 6. Haimbaugh R.E. , Induction Heat Treating Corp. , personal communication, 2001 7. Fett G. , Griebal A. , and Tartaglia J. , Defects and Abnormal Characteristics of Induction Hardened Components , Induction Heating and Heat...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... is continually exposed at the sharp tip. Source: Ref 4 Fig. 9 Self-sharpening of a digging tooth from ground-contact equipment by controlled wear through selective hardfacing. The pattern of hardfacing can be varied to suit the condition, but note that the blunt tooth is hardened on both sides, while...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180061
EISBN: 978-1-62708-256-3
... component failures (laboratory data) Failure origin Percentage Improper maintenance 43 Fabrication defects 18 Design deficiencies 15 Abnormal service damage 11 Defective material 8 Undetermined cause 5 Table 2 also has well-described failure origins, and the data...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
... Abstract The wear caused by contact stress fatigue is the result of a wide variety of mechanical forces and environments. This chapter discusses the characteristics of four types of contact stress fatigue on mating metal surfaces: surface, subsurface, subcase, and cavitation. Features...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630237
EISBN: 978-1-62708-270-9
... of incidents exposes the component to an excessively high temperature (hundreds of degrees above normal), to the point where deformation or yielding occurs. Overheating results from abnormal conditions such as loss of coolant flow and excessive temperature excursion. Long-term overheating occurs over...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440243
EISBN: 978-1-62708-262-4
..., or the hardness of parts after heat treating. In applying statistical analysis, the assumption is implicit that the data analyzed are random; that is, the data tend to scatter around some average value. The pattern of variation or frequency distribution typically found when data are taken from some natural...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... of 90% of all service failures. Fatigue fractures are serious because they are insidious; that is, they are frequently “sneaky” and can occur without warning. Obviously, if service is abnormal as a result of excessive overloading, corrosive environments, or other conditions, the possibility of fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030235
EISBN: 978-1-62708-282-2
... pattern. Thus, to realize safe, reliable designs, it is essential that there be a rigid control on materials and fabrication and an extensive effort to eliminate human errors or misunderstandings that result from poor communication. The results of a survey of chemical-processing plants ( Ref 28...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740103
EISBN: 978-1-62708-308-9
... friction. Lubricants also reduce die wear, help in providing temperature control, and minimize high-temperature oxidation of the workpiece. Hot working normally takes place at approximately 70 to 80% of the absolute melting temperature. During hot working...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850334
EISBN: 978-1-62708-260-0
..., wear, fracture toughness, and tensile strength as well as temperature effects, residual stress, and quality control. hardness hardness testing References 1. O’Neill H. : The Hardness of Metals and Its Measurement , Chapman & Hall, Ltd. , London...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
..., brittleness, and strength in the surface and greater toughness and ductility in the softer core in order to provide optimal (Ref 2) : Wear resistance Resistance to scoring Bending and/or torsional fatigue strength Rolling-contact fatigue strength These properties are optimized...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040193
EISBN: 978-1-62708-300-3
... defects are avoided Predicting temperatures so that part properties, friction conditions, and die wear can be controlled Improve part quality and complexity while reducing manufacturing costs by: Predicting and improving grain flow and microstructure Reducing die tryouts and lead times...