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hardness test equipment

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Published: 01 January 2002
Fig. 15 Life assessment of rotating equipment damaged by exposure to excessive temperatures or loss of lubricant. (a) Journal that overheated because of the loss of lubricating oil. (b) Hardness test results of the heat-damaged region indicated the formation of a hard martensite layer More
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Published: 30 August 2021
Fig. 15 Life assessment of rotating equipment that has been damaged by exposure to excessive temperatures or loss of lubricant. (a) Journal that overheated because of the loss of lubricating oil. (b) Hardness test results for the heat-damaged region indicated the formation of a hard martensite More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001777
EISBN: 978-1-62708-241-9
... affected by the initiation of the collapse; (c) sampling of key parts for evaluation through mechanical tests (hardness, tensile, and Charpy tests), fractography, and microstructural characterization; (d) structural analysis using computational models; and (e) analysis of the operational conditions before...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001073
EISBN: 978-1-62708-214-3
.... The original sprocket had an average hardness of 89 HRB (180 HB converted), and the replacement sprocket had an average hardness of 55 HRB (100 HB converted). Discussion Spark testing clearly indicated that the original sprocket was a medium plain carbon steel similar to 1045. The replacement sprocket...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
..., involves rather inexpensive testing equipment, and is relatively quick. Theoretical and empirical investigations have resulted in fairly accurate quantitative relationships between hardness and other mechanical properties of materials. Uses and Limitations in Failure Analysis As described previously...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001267
EISBN: 978-1-62708-215-0
... Abstract Music wire springs used in a printer return mechanism failed near the bend in the hook portion of the spring during qualification testing. Samples were examined in a scanning electron microscope equipped with an energy-dispersive x-ray microprobe. Fatigue fractures originated at rub...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001339
EISBN: 978-1-62708-215-0
... in the parts per billion range present a serious threat to the integrity of the aluminum equipment. Remedial Action Prior to restarting the plant, all of the aluminum alloy piping was pneumatically tested with dry nitrogen and was checked for leaks. A mercury-removal system consisting of a sulfur...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046418
EISBN: 978-1-62708-234-1
... (visual inspection, 100x/500x/800x micrographic examination, spectrographic analysis, and hardness testing) supported the conclusions that, as a result of improper heat treatment, the combustion-chamber material was too soft for successful use in this application. Misalignment of the combustion chamber...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001819
EISBN: 978-1-62708-241-9
... acid, 10 mL chloridic acid, and 60 mL distilled water etchant. Samples for fractographic analysis were observed and photographed in equipment operating at 20 kV. Rockwell C hardness test comprised five measurements at different points of the sample, and the average value was calculated and considered...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006812
EISBN: 978-1-62708-329-4
.../equipment to observe and document similarities and/or differences in appearance, dimensions, or materials Chemical analyses (bulk, local, surface corrosion products, and deposits or coatings) Nondestructive testing of the subject part (if available) and selected “unfailed” parts Stress and fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
..., a chemical process chamber, a hydrostatic test chamber used to test underwater equipment, or a pressure vessel for human occupancy. Once the intended use is identified, the appropriate design code can be selected. For example, pressure vessels use codes provided by many organizations and certifying agencies...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006802
EISBN: 978-1-62708-329-4
... in the design of any pressure vessel is to select the proper design code based on its intended use. For example, a pressure vessel may be a power or heating boiler, a nuclear reactor chamber, a chemical process chamber, a hydrostatic test chamber used to test underwater equipment, or an aircraft fuselage...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001116
EISBN: 978-1-62708-214-3
... at the outside surface. Metallographic analysis showed that the fracture originated in the upturned fibers adjacent to the ERW bond line. Cross sections of the weld were removed from three random locations in the test sample. At each location, the up turned fibers of the weld zone contained bands of hard...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001811
EISBN: 978-1-62708-180-1
... Abstract This article focuses on the mechanisms and common causes of failure of metal components in lifting equipment in the following three categories: cranes and bridges, particularly those for outdoor and other low-temperature service; attachments used for direct lifting, such as hooks...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001072
EISBN: 978-1-62708-214-3
... Crack 2 is between arrows on inside face of cover. ∼0.59×. Fig. 5 Typical macroetched cross section of cover, vane, welds, and disk. All hardnesses are HRC. ∼0.51×. Testing Procedure and Results Nondestructive Evaluation Magnetic Particle Testing The entire impeller surface...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006830
EISBN: 978-1-62708-329-4
... to determine the strength of an entire rope from tensile testing of individual wires, because not all wires are the same diameter, and some filler wires may not be designed for high strength. Microindentation hardness testing can suggest that the material is at a highly cold-worked condition, but hardness...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006804
EISBN: 978-1-62708-329-4
... Dimensional profiles of vertical and horizontal vessels Straightness of shell and piping sections Nozzle orientations Vertical plumb measurements Hardness tests of base metal and welds Removal of coupons for mechanical testing and metallographic analysis Wall-thickness measurements...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001400
EISBN: 978-1-62708-235-8
... residual stresses as being primarily responsible. Tests carried out tend to suggest that stress relief was not carried out. For the replacement plant, consideration of stress relieving or the use of an alternative material was advised. Absorbers (equipment) Carbon dioxide Monoethanolamine Stress...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001805
EISBN: 978-1-62708-241-9
... Fig. 3 Metallographic examination of the scissors indicated crack branching Microhardness testing on the broken scissors indicated a hardness of approximately 58 on the Rockwell C (HRC) scale. At this hardness, it is possible that the scissors were not subjected to a tempering treatment...