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hardness measurement

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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
Published: 01 December 2019
Fig. 8 The locations of hardness measurements below cracked surface More
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Published: 01 December 2019
Fig. 9 The locations of hardness measurements on the cylinder head More
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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
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
.... 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...
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
...-appearing microstructure. Hardness measurements confirmed these observations. The cracks followed these bands. It was concluded that the tubing failed from sulfide stress cracking, which resulted from bands of susceptible microstructure in the ERW zone. The banded microstructure in the pipe suggested...
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
... after it broke, which resulted in extensive loss of metal between the holes. 80x micrograph and 4x macrograph of a 5% nital etched longitudinal section, and chemical analyses showed the poppet did fit 1213 or 1215 specs. However, hardness measurements showed surface hardness was excessive-61 to 65 HRC...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001759
EISBN: 978-1-62708-241-9
... Experimental Procedure Experiment Plan Liquid Nitrided Samples Microstructure Hardness Measurements Microstructure Hardness Measurements Carburized and Hardened Samples Chemical Analysis Carbonitrided and Hardened Samples Microstructure Conclusion Test Procedure Endurance...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001348
EISBN: 978-1-62708-215-0
... Abstract Two tanks made of AISI type 304 stainless steel exhibited cracking in the heat-affected zone (HAZ) of the weld that joined the dished end and the shell. The dished ends had been produced by cold deformation. Hardness measurement and simulation tests showed that the deformation...
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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
Published: 01 December 1993
Fig. 3 Schematic sample taken from locationg 9 in Fig. 1 . (a) Crevice under the deposit. (b) Enlargement of region 2 in (a), showing hardness measurements along the crevice More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006417
EISBN: 978-1-62708-234-1
..., presumably in an oxide form. The inside surface had the appearance of typical corrosion products. Hardness measurements indicated that the 4340 steel was heat treated to a strength of approximately 862 MPa (125 ksi). It was concluded that the oxide detected on the ballast elbow was iron oxide...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001795
EISBN: 978-1-62708-241-9
... 0.02 Iron Bal Bal Bal Results of hardness measurements on the bearing components Table 3 Results of hardness measurements on the bearing components Bearing components Hardness Outer ring 724 HV/100 kg load (~61.2 HRC) Inner ring 724 HV/100 kg load (~61.2 HRC) Balls...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001155
EISBN: 978-1-62708-223-5
... an unfavorable effect on the life of the component by acting as notches with their resulting stress concentration. Considering the great hardness of the case, the small radii would have been critical even without grooves. Measures were taken so that the critical radius of the milling machine was increased...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001905
EISBN: 978-1-62708-217-4
... confirmed that the component was in the annealed condition and not in the required work-hardened 1/4-hard condition. Bombs (weapons) Retaining bands Equiaxed structure Dimensional measurements 302 UNS S30200 Heat treating related failures Introduction Component: MK#15/Mod 6 Snakeye bomb...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0089429
EISBN: 978-1-62708-223-5
... parallel to the axis near the center of the drill. After etching, this section showed carbide bands in a martensitic matrix. Hardness measurements indicated 65 to 66 HRC at the edge of the flute with a bulk hardness of 62 to 64 HRC. The drill tip is shown in Fig. 1 . Fig. 1 The tip of the broken...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0092142
EISBN: 978-1-62708-217-4
... 4140 steel slat track from a military aircraft wing. The track bent because one end did not become fully austenitic during heat treatment, producing a low-strength structure of ferrite and tempered martensite. Investigation Hardness measurements were taken at various points along the length...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
... with a > 500-μm diameter; ( c ) pore 100 μm from the surface; and ( d ) porosity near the threads Fig. 8 The locations of hardness measurements below cracked surface Fig. 9 The locations of hardness measurements on the cylinder head Fig. 4 Removal torque (Nm) of the cylinder head...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001613
EISBN: 978-1-62708-235-8
... ). This indicates that the threaded portion of the screw was carburized. These findings were confirmed by hardness measurements at various regions of the screw. Fig. 7 Optical micrographs of the cup portion showing (a) tempered martensite in the case region, (a) tempered martensite and some ferrite (light...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001310
EISBN: 978-1-62708-215-0
... in (a), showing hardness measurements along the crevice Fig. 4 Micrograph showing crevice attack, porous mass, and intergranular attack at the bottom of the crevice Metallography Crack Origins/Paths Based on the corrosion morphology and the dimensions of the crack, it was concluded...