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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 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...
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 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...
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
... the main 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
... Rotary pumps Shrinkage CA-15 UNS J91150 Casting-related failures Background Numerous cracks and other defects were apparent on the surface of a main boiler feed pump impeller at an electric utility. Circumstances Leading to Failure The impeller had been in operation for about 3 years...
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
... to cavitation erosion. Whenever high velocities give rise 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 or pumps...
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
..., “ Erosive Wear Failures ,” Failure Analysis and Prevention , Volume 11, ASM Handbook , ASM International, 2002, p 995–1001. The term abrasive erosion is sometimes used to describe erosion in which the solid particles move nearly parallel to the solid surface. For example, abrasive erosion in pump...
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
... Motors Pumps Turbines Metal (Other, miscellaneous, or unspecified) failure (Other, general, or unspecified) fracture Cavitation wear Part I—Special Cases Part II—Turbines, Pumps, and Compressors Part III—Fans and Motors Selected References Selected References • Chen Y...
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 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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
...Abstract 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...
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
... and depressions are often provided in bearing surfaces to supply or feed lubricant to the load-carrying regions. It is often stated that such grooves are reservoirs for lubricant, but they can also be pathways for lubricant to escape. They function best when lubricant is pumped into them at the pressure...
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
..., bearing bush, and journal surface. The excessive heat also softened the induction-hardened case on the journal surface, decreasing its fatigue strength. Fatigue crack initiation occurred at the root fillet of the groove because of stress concentration. rotary shaft bearing sleeve fracture...
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
... that can be produced on springs during rotary straightening. The indentation and the other marks were, in effect, notches and would have some detrimental effect on fatigue life because of the reduced cross-sectional area in those zones. Microscopic examination of the fracture surface ( Fig. 13d...
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...
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
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...
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
... Gears Bevel gears transmit rotary motion between nonparallel shafts that are usually at 90° to each other. Straight Bevel Gears Straight bevel gears ( Fig. 6a ) have straight teeth that, if extended inward, would intersect at the intersection of gear and pinion axes. Thus, the action between...
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