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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001202
EISBN: 978-1-62708-234-1
... Abstract Two damaged impellers made of austenitic cast iron came from a rotary pump used for pumping brine mixed with drifting sand. On one of the impellers, pieces were broken out of the back wall in four places at the junction to the blades. The fracture edges followed the shape of the blade...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001370
EISBN: 978-1-62708-215-0
... Abstract A service water pump in a nuclear reactor failed when its shaft gave way. The fracture originated in the threaded portion of the sleeve nut on the drive-end side of the shaft. Results of the failure analysis showed that the cracking initiated at the thread root as a result of corrosion...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001085
EISBN: 978-1-62708-214-3
... crack indication revealed that the failure was caused by hot cracking related to original weld repairs performed on the impeller casting. Castings Nuclear reactor components Repair welding Rotary pumps Weld defects Welded joints CA-15 UNS J91150 Joining-related failures Background...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001365
EISBN: 978-1-62708-215-0
... Abstract An investigation was conducted to determine the cause of numerous cracks and other defects on the surface of a cast ASTM A743 grade CA-15 stainless steel main boiler feed pump impeller. The surface was examined using a stereomicroscope, and macrofractography was conducted on several...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... Pumps Turbines Metal (Other, miscellaneous, or unspecified) failure (Other, general, or unspecified) fracture Cavitation wear Part I—Special Cases Case #1: Vibration in Hydroelectric Dam The entire structure of a hydroelectric dam would begin to vibrate whenever a hydroelectric turbine...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003568
EISBN: 978-1-62708-180-1
..., as in a jet or rotary pump, vapor bubbles collapse at high-pressure areas and destroy the protective film on the metal surface or disrupt the metal itself. Cavitation erosion occurs typically on rotors or pumps, on the trailing faces of propellers and of water turbine blades, and on the water-cooled side...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006795
EISBN: 978-1-62708-295-2
... to extremely low-pressure areas, as in a jet or rotary pump, vapor bubbles collapse at high-pressure areas and destroy the protective film on the metal surface or disrupt the metal itself. Cavitation erosion occurs typically on rotors and pumps, on the trailing faces of propellers and of water turbine...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... the axial movement of rotating shafts. Spherical surfaces allow rotary motion around more than one axis, such as that provided by the hip joint of the human skeleton. The cylindrical surface pair (the shaft and journal pair) is the most common type in machines. These are also called plain bearings or simple...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001459
EISBN: 978-1-62708-234-1
... Abstract Fundamentals of fatigue failure are outlined. Addressed are fatigue crack characteristics, basic crack types, unidirectional bending, alternate bending, rotary bending, torsion, direct stress, and combined stress. Stress cycle, endurance limits, under and overstressing, stress...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
... Abstract In addition to failures in shafts, this article discusses failures in connecting rods, which translate rotary motion to linear motion (and conversely), and in piston rods, which translate the action of fluid power to linear motion. It begins by discussing the origins of fracture. Next...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... Abstract This article discusses failures in shafts such as connecting rods, which translate rotary motion to linear motion, and in piston rods, which translate the action of fluid power to linear motion. It describes the process of examining a failed shaft to guide the direction of failure...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001846
EISBN: 978-1-62708-241-9
... because of stress concentration. References References 1. Steel-iron parts-determination of nitrided case depth and metallographic examination of nitriding structure , China Standard, GB1542–GB1589 ( 1990 ) 2. Berntd F. , Van Bennekom A. : Pump shaft failures a compendium...
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
.... Sometimes, based on the configuration, bearings are described as half-round, full-round, flanged, or washer. Spherical surfaces allow rotary motion around more than one axis, such as that provided by the hip joint of the human skeleton. Both radial and axial loads can be accommodated by spherical bearings...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001813
EISBN: 978-1-62708-180-1
...-injection pumps when the fuel oil being pumped was a normal low-sulfur grade, but several of these springs failed under identical stress conditions when the fuel oil contained substantial amounts of hydrogen sulfide. In addition, operating temperatures that are higher than those anticipated often result...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... and loading. Example 4: Damaged Austenitic Cast Iron Impellers in a Rotary Pump Caused by Cracks Initiated at Zones of Localized Shrinkage Porosity <xref rid="a0003508-ref11" ref-type="bibr">(Ref 11)</xref> Two damaged impellers manufactured from austenitic cast iron came from a rotary pump used...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... sets, such as rotary kilns and process vessels, precision gear alignment is often difficult, and the common procedure is to use through-hardened gears with surface-hardened pinions. The steel alloys used depend on the application and the designer’s preference. For through hardening and with lower...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003505
EISBN: 978-1-62708-180-1
... common stereotypical expectations as much as possible. Consider a few examples: Clockwise rotation of a rotary control (knob) is expected to increase the output. Moving a lever forward, upward, or to the right is expected to increase the output. On a vertically numbered scale, the higher...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... generally arise from the rotary or reciprocating motion of mechanical devices, either from normal operation or from abnormal effects, such as vibration and resonance. Other major sources of cyclic stresses in service are fluid-flow effects, including the von Karman effect and cavitation...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2