1-20 of 311 Search Results for

hardness evaluation

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... the microstructure, chemistry and hardness of the steel and measuring the dynamic toughness and fatigue crack growth rates in the banded region. By noting these differences, bridge engineers can re-evaluate existing designs and modify current bridge inspection procedures. The steel used in the construction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001507
EISBN: 978-1-62708-217-4
...). The hardness dropped to a uniform reading of 30–32 HRC immediately upon transitioning into the normal, darker etched zone of the base material. Hardness evaluation of a sample taken from the shank, in an area remote from the failure origin, gave uniform results with an average value of 31 HRC. The observed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0006900
EISBN: 978-1-62708-225-9
... and to evaluate the effect of annealing and the hydrogen-stress cracking behavior of type 316 stainless steel. Half-hard type 301, annealed type 301, and annealed type 316 stainless steel clamp ends were placed in 0.1 N sodium chloride (NaCl) solution with or without MoS 2 treatment. Half of each specimen type...
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
... but is generally used as a pass/fail evaluation Hardness testing Macroindentation hardness testing Rockwell hardness Hardness Need smooth surface finish, flat surface, and parallel sides Sample must fit within the machine and be balanced on the pedestal Brinell hardness Hardness Need smooth...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001332
EISBN: 978-1-62708-215-0
... Evaluation The flange was ultrasonically tested from the outside diameter. The indications were rather puzzling, because the reflections were consistently from a cylindrical surface about 95 mm (3.75 in.) from the OD. Dry magnetic particle examination confirmed that the cracks extended more or less...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001698
EISBN: 978-1-62708-222-8
... evaluation of a cross section of a copper pipe revealed extensive pitting corrosion throughout the inner diametral surfaces of the pipe. Some pits had penetrated through the wall thickness, causing the pin hole leaks. Analysis of a sample of water obtained from the subdivision revealed relatively high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001595
EISBN: 978-1-62708-235-8
... evaluation revealed a D I of 45.7 mm (1.8 in.) due to the presence of trace elements. The typical D I of Grade 1045 steel is 22.9 mm (0.9 in.). A high carbon content (0.52%) was also identified, further contributing to high core hardness. Hardenability evaluation and tempering curve inspection revealed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001120
EISBN: 978-1-62708-214-3
... for verification of the chemical composition, measurement of hardness, and analysis of the heat-treated microstructure and surface conditions. Testing Procedure and Results Surface Examination The segment was examined visually and with a stereoscopic microscope at magnifications up to 45× to evaluate...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001575
EISBN: 978-1-62708-217-4
... teeth in the undamaged area (groove - flanks) and to evaluate hardness drop due to overheating (fillet radius and shaft). As visible in Figure 4 , in the most thermally affected zones (shaft and fillet radius), a drop of about 250 HV at 0.1mm from surface was detected. In the unaffected areas...
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 Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001790
EISBN: 978-1-62708-241-9
...-magnification SEM micrograph of fatigue striations observed on the fracture surface shown in Fig. 4(a) Mechanical Testing and Evaluation In order to determine the approximate mechanical properties of the shaft, a series of hardness evaluations was conducted. Rockwell “C” Scale (HRC) measurements...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... equipment on an approximately 20-year-old business jet airliner. The aircraft had been brought in for service, and the standard wing de-mating process was initiated to evaluate the extent of corrosion to the airframe. For reasons that were not clear at the time of the investigation, the complete service...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001362
EISBN: 978-1-62708-215-0
... that the potential for water carryover or feedwater induction into the turbine be addressed via an engineering evaluation of the plant's water treatment procedures, steam separation equipment, and start-up procedures. Chlorides Feedwater Turbine blades Water chemistry ASTM A470 grade 4 UNS K22878 Pitting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0089567
EISBN: 978-1-62708-230-3
... and/or material quality from service. Casting defects Cold shuts Dryer heads Paper machines Stress concentration Gray iron Casting-related failures A paper-drier head manufactured from gray cast iron was removed from service as a result of nondestructive evaluation (NDE) detection of cracklike...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047343
EISBN: 978-1-62708-236-5
... similar to ASTM A395. Visual examination of the rotor revealed unusually heavy oxidation and thermal fatigue cracking along the edge of the gas passage. Material properties, including microstructure, composition, and hardness, of both the rotor and housing were evaluated to determine the cause of failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001500
EISBN: 978-1-62708-221-1
... Abstract A ‘worn-out’ spiral bevel gear and pinion set was submitted for examination and evaluation. This was a spiral bevel drive set with the gear attached to a differential. The assembled unit was driving a new, large, experimental farm tractor in normal plowing and tilling operations...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001083
EISBN: 978-1-62708-214-3
... to prevent future failures were recommended: changing the impeller composition to a cast stainless steel, or implementing stricter nondestructive evaluation requirements for copper alloy castings. Boilers Sulfide attack C83600 UNS C83600 Intergranular corrosion Casting-related failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001718
EISBN: 978-1-62708-220-4
... Abstract Post-service destructive evaluation was performed on two commercially pure zirconium pump impellers. One impeller failed after short service in an aqueous hydrochloric acid environment. Its exposed surfaces are bright and shiny, covered with pockmarks, and peppered with pitting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0045992
EISBN: 978-1-62708-225-9
... was specified to be case hardened to 55 to 60 HRC, with a case depth of 0.6 to 0.9 mm (0.025 to 0.035 in.); the hardness of the mating valve seat was 40 HRC. Analysis showed that the fracture occurred through two 8 mm (0.313 in.) diam holes at the narrowest section of the poppet. The valve continued to operate...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
... Abstract This article focuses on the visual or macroscopic examination of damaged materials and interpretation of damage and fracture features. Analytical tools available for evaluations of corrosion and wear damage features include energy dispersive spectroscopy, electron probe microanalysis...