Skip Nav Destination
Close Modal
Search Results for
hardness
Update search
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
NARROW
Format
Topics
Book Series
Date
Availability
1-20 of 882 Search Results for
hardness
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
1
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0046388
EISBN: 978-1-62708-224-2
... Abstract The bolt in a bolt and thimble assembly used to connect a wire rope to a crane hanger bracket was worn excessively. Two worn bolts, one new bolt, and a new thimble were examined. Specifications required the bolts to be made of 4140 steel heat treated to a hardness of 277 to 321 HRB...
Abstract
The bolt in a bolt and thimble assembly used to connect a wire rope to a crane hanger bracket was worn excessively. Two worn bolts, one new bolt, and a new thimble were examined. Specifications required the bolts to be made of 4140 steel heat treated to a hardness of 277 to 321 HRB. Thimbles were to be made of cast 8625 steel, but no heat treatment or hardness were specified. Analysis (visual inspection, hardness testing, and metallographic examination) supported the conclusion that the wear was due to strikingly difference hardness measurements in the bolt and thimble. Recommendations included hardening and tempering the bolts to the hardness range of 375 to 430 HRB. The thimbles should be heat treated to a similar microstructure and the same hardness range as those of the bolt. Molybdenum disulfide lubricant can be liberally applied during the initial installation of the bolts. A maintenance lubrication program was not suggested, but galling could be reduced by periodic application of a solid lubricant.
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048052
EISBN: 978-1-62708-224-2
... occurred in links having hardness values in the range of 375 to 444 HRB. It was revealed by the supplier that the previous hardness level of 302 to 375 HRB was increased to minimize wear which made the links were made notch sensitive and resulted in fractures that initiated at the butt-weld flash...
Abstract
Several thousands of new 16 mm diam alloy steel sling chains used for handling billets failed by chain-link fractures. No failures were found to have occurred before delivery of the new chains. It was observed that the links had broken at the weld. It was found that all failures had occurred in links having hardness values in the range of 375 to 444 HRB. It was revealed by the supplier that the previous hardness level of 302 to 375 HRB was increased to minimize wear which made the links were made notch sensitive and resulted in fractures that initiated at the butt-weld flash on the inside surfaces of the links. A further reduction in ductility was believed to have been caused by lower temperatures during winter months. Thus, the failure was concluded to have been caused in a brittle manner caused by the notch sensitivity of the high hardness material at lower temperatures. The chains were retempered to a hardness of 302 to 375 HRB as a corrective measure and subsequently ordered chains had this hardness as a requirement.
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001207
EISBN: 978-1-62708-235-8
... Abstract Pipes made of low-carbon Thomas steel had been welded longitudinally employing the carbon-arc process with bare electrode wire made for argon-shielded arc welding. Difficulties were encountered during the cutting of threads because of the presence of hard spots. Microstructural...
Abstract
Pipes made of low-carbon Thomas steel had been welded longitudinally employing the carbon-arc process with bare electrode wire made for argon-shielded arc welding. Difficulties were encountered during the cutting of threads because of the presence of hard spots. Microstructural examination showed welding conditions were such that a carburizing atmosphere developed, which led to an increase in carbon content and hardening at certain locations such as terminal bells and lap joints. This explained the processing difficulties during the threading operation.
Image
in Application of Fracture Mechanics to Pipeline Failure Analysis
> ASM Failure Analysis Case Histories: Oil and Gas Production Equipment
Published: 01 June 2019
Fig. 5 Map of hardness of outside surface of piece 5-1-D, compiled from hardness measurements using Rockwell hardness tests (subsequently, converted to Knoop hardness) and Knoop hardness measurements.
More
Image
in Failure in Steam Turbine Blades
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 2 top: hardness (HV 10) along the blade axis (1:3.6), centre and bottom: hardness measured at the bolts with or without cracks on a quadratic grid (1:1).
More
Image
in Catastrophic Failure of a Fan in a Diesel Engine Cooler
> ASM Failure Analysis Case Histories: Automobiles and Trucks
Published: 01 June 2019
Fig. 10 Hardness variation of the nuggets
More
Image
in Worn Gears for Fuel Injection Pumps
> ASM Failure Analysis Case Histories: Automobiles and Trucks
Published: 01 June 2019
Fig. 7 Hardness distribution from periphery to core on transverse sections of non-worn areas of gears 1 and 2 and of the unused gear 3.
More
Image
in Alloy 430 Ferritic Stainless Steel Welds Fail due to Stress-Corrosion Cracking in Heat-Recovery Steam Generator
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 5 Hardness vs. tempering temperature, Alloy 410 tempered for 2 h 17
More
Image
Published: 01 June 2019
Fig. 1 Propeller blade failed near the tip. Material: 2025-T6 or 2219-T6; hardness: DPH 128 to 138.
More
Image
in Metallurgical Evaluation of Inner Wall Softening in a Tow Flight Missile Case
> ASM Failure Analysis Case Histories: Air and Spacecraft
Published: 01 June 2019
Fig. 6 Hardness profile in the threaded region of the as-received condition.
More
Image
in Metallurgical Evaluation of Inner Wall Softening in a Tow Flight Missile Case
> ASM Failure Analysis Case Histories: Air and Spacecraft
Published: 01 June 2019
Fig. 7 Hardness profile at various locations along the length of the motor case in the as-received condition.
More
Image
in Metallurgical Evaluation of Inner Wall Softening in a Tow Flight Missile Case
> ASM Failure Analysis Case Histories: Air and Spacecraft
Published: 01 June 2019
Fig. 8 Hardness profile at various locations along the length of the motor case in the (a) resolution treated-reaged and (b) reaged condition.
More
Image
in Failure Analysis of Liquid Propane Gas Cylinder
> ASM Failure Analysis Case Histories: Oil and Gas Production Equipment
Published: 01 June 2019
Fig. 9 Distribution of vickers hardness near the fractured surface. In the symbol I, the middle black point is the mean value of vickers hardness and standard deviation is indicated by the bar enclosed lines.
More
Image
in Metallurgical Investigation of a Turbine Blade and a Vane Failure from Two Marine Engines
> ASM Failure Analysis Case Histories: Offshore, Shipbuilding, and Marine Equipment
Published: 01 June 2019
Fig. 10 (Left) Hardness profile of another turbine blade from the same row in the same engine varying as a function of sampling location along the blade airfoil.
More
Image
in Weld Decay—an Example From Service
> ASM Failure Analysis Case Histories: Chemical Processing Equipment
Published: 01 June 2019
Fig. 7 Hardness distribution across joints seen in Figs. 2 & 3 .
More
Image
in Failure Analysis of a Radio-Activated Accelerator Component
> ASM Failure Analysis Case Histories: Failure Modes and Mechanisms
Published: 01 June 2019
Fig. 18 A trace of hardness measurements across the beam area compared with the hardness in the initial PH condition 1
More
Image
in Abrasive Wear Failure of a Hypoid Pinion
> ASM Failure Analysis Case Histories: Failure Modes and Mechanisms
Published: 01 June 2019
Fig. 2 Case hardness traverse used to diagnose the problem of the hypoid pinion shown in Fig. 1 .
More
Image
in Failure of 17-4 PH Stainless Steel Bolts on a Titan Space Launch Vehicle
> ASM Failure Analysis Case Histories: Mechanical and Machine Components
Published: 01 June 2019
Fig. 3 The relationship between hardness and toughness of 17-4 PH is almost linear.
More
Image
in Hydrogen-Assisted Stress-Corrosion Cracking Failure of Four AISI 4137 Steel Bolts
> ASM Failure Analysis Case Histories: Mechanical and Machine Components
Published: 01 June 2019
Fig. 1 4137 steel bolts (hardness: 42 HRC) that failed by hydrogen-assisted SCC caused by acidic chlorides from a leaking polymer solution. (a) Overall view of failed bolts. (b) Longitudinal section through one of the failed bolts in (a) showing multiple, branched hydrogen-assisted stress
More
Image
in Failure of a Weld Seam in a Heat Exchanger of an Ammonia Synthesis Plant
> ASM Failure Analysis Case Histories: Chemical Processing Equipment
Published: 01 June 2019
Fig. 7 Hardness values near the weld seam.
More
1