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Brinelling

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047956
EISBN: 978-1-62708-235-8
... Abstract Randomly selected dictating-machine drive mechanisms, which contained small ball bearings, were found to exhibit unacceptable fluctuations in drive output during the early stages of production. It was indicated that the bearing raceways were being true brinelled before or during...
Image
Published: 01 January 2002
Fig. 37 Comparison of true Brinelling with false Brinelling. (a) In true Brinelling, the surface texture is essentially undisturbed. Note grinding marks in the impression. (b) In false Brinelling (fretting), the surface is worn away or material is transferred. No grinding marks are visible More
Image
Published: 30 August 2021
Fig. 43 Comparison of true and false Brinelling. (a) In true Brinelling, the surface texture is essentially undisturbed. Note grinding marks in the impression. (b) In false Brinelling (fretting), the surface is worn away or material is transferred. No grinding marks are visible More
Image
Published: 01 January 2002
Fig. 38 Severe damage from fretting (false Brinelling) on the surface of a shaft that served as the inner raceway for a needle-roller bearing More
Image
Published: 30 August 2021
Fig. 38 Severe case of false Brinelling in a needle cage rolling-element bearing More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048164
EISBN: 978-1-62708-217-4
... member about 25 mm thick and attached to the fuselage by a single bolt. Brinelling (plastic flow and indentation due to excessive localized contact pressure) was observed on the upper surface of the spring where the forward and rear edges of the spring contacted the support member. It was indicated...
Image
Published: 30 August 2021
Fig. 31 Surface finish modification factor vs. tensile strength or Brinell hardness for different surface finishes. Adapted from Ref 90 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001018
EISBN: 978-1-62708-217-4
... Cr-V steel flat spring attached at the top end to the fuselage and at the bottom end to the axle. Failure occurred at the clamping point near the top end of this spring. The failure showed evidence of severe brinelling at one corner in the clamping area. The fracture surfaces were clean, fresh...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047968
EISBN: 978-1-62708-225-9
... surface. Smearing, true-brinelling marks, and evidence of flaking caused by the shifting of the contact area (toward one side) under axial load, was revealed by SEM investigation of one side of the outer-ring raceway. The true-brinelling marks on the raceways were found to be caused by excessive loading...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001462
EISBN: 978-1-62708-224-2
... at the mid-length of the sides. Brinell hardness values confirmed that the link was made from the higher tensile grade of material. The cracks were due to fatigue, there being no indications that the weld was initially defective. Butt welds Chains Steel chain Fatigue fracture The following case...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001154
EISBN: 978-1-62708-223-5
... fatigue stresses in the drop forge. The second piston rod of 120 mm diam consisted of a steel with 0.25% C and 1.00% Mn. It allegedly had 57 kp/sq mm tensile strength and 26% elongation. The basic structure of the 120 mm piston rod was ferritic-pearlitic and hardness of 155 Brinell was accordingly low...
Image
Published: 30 August 2021
Fig. 44 Surface of a shaft, which served as an inner bearing raceway, that failed by spalling initiated at true-Brinelling indentations More
Image
Published: 01 June 2019
Fig. 1 Discovery of a defect in one corner of this failed aircraft landing gear (close-up) provided the key. Two conclusions were reached: the corner was subjected to repeated brinelling during normal landing loads. This was probably compounded by looseness in a clamping device. More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... 58 HRC, resistance to pitting fatigue is reduced, and the possibility of brinelling (denting) of bearing raceways is increased. Because hardness decreases with increasing operating temperature, the conventional materials for ball and roller bearings can be used only to temperatures of approximately...
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...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003562
EISBN: 978-1-62708-180-1
... damage are false Brinelling , which is applied particularly to bearings where the craters caused by the vibration of the ball against the race are circular and resemble Brinell impressions, and “fitting rust,” where gages or shims are clamped together and experience vibration. The terms fretting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001198
EISBN: 978-1-62708-221-1
... at a comparatively high temperature for stress relief. The core structure of the caps consisted of graphite in pearlitic-ferritic matrix ( Figs. 6 and 7 ). The average Brinell hardness was 160 kgf/mm 2 , from which a low strength could be inferred. Fig. 2 Section through groove parallel to fracture, etch...
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
... 0.42 0.57 0.01 0.11 Base EN-46200 [1] 8.5–9.5 0.3–0.7 2.3–2.6 0.35–0.50 0.25–0.50 0.5–0.7 0.30 max 0.08–0.012 Base Brinell hardness on the cylinder head (HB 5/250) Table 3 Brinell hardness on the cylinder head (HB 5/250) Cylinder head top Cylinder head bottom Below...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001134
EISBN: 978-1-62708-214-3
... in.). An estimated conversion to Brinell hardness suggested that the material was harder than the value recommended for safety (302 to 352 HB). Microhardness values <xref rid="c9001134-tn1" ref-type="table-fn">(a)</xref> Table 1 Microhardness values (a) Distance from edge Knoop hardness Brinell...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006836
EISBN: 978-1-62708-329-4
.... 35a . The spring had broken laterally at an angle of about 60° to its longitudinal axis ( Fig. 35a ). One end of the fracture corresponded to the point at which the forward edge of the spring contacted the support member. The other end of the fracture was in an unsupported area. Brinelling...