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grinding defects

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0059924
EISBN: 978-1-62708-235-8
... to reveal detectable indications. The indications were not considered serious enough to reject the forgings. A few small indications in the areas tested were revealed by magnetic particle inspection. The area was conditioned by grinding and polishing to obtain an additional inspection at a greater depth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047830
EISBN: 978-1-62708-235-8
.... As a corrective measure, the forgings were normalized, hardened and tempered to 28 to 32 HRC before being machined to increase fatigue strength and extremely rough surfaces were removed by careful grinding. Defects 4140 UNS G41400 Fatigue fracture Metalworking-related failures Textile-machine...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001761
EISBN: 978-1-62708-241-9
... be done carefully. crankshaft fatigue fracture misalignment forged nitrided steel grinding defects electron-dispersive x-ray analysis fatigue strength 42CrMo4 (chromium-molybdenum alloy steel) UNS G41400 Introduction Experimental Investigation Results and Discussion Determination...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001084
EISBN: 978-1-62708-214-3
... surface defects. Note the grinding marks on shroud surface A. (b) Closeup view of the fracture surface and group 1 defects. Outer shroud surface A and inner passageway shroud surfaces B (underside of surface A) and C are indicated. Note grinding marks on surfaces A and C. As-received fractured second...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0009222
EISBN: 978-1-62708-180-1
..., the defects will usually enlarge and often break the tool. Grinding cracks frequently show characteristic patterns that aid in their identification ( Fig. 7 ). Light cracks tend to form in parallel lines transverse to the direction of grinding. Heavy cracks assume a network pattern. Fig. 7 A slitter...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
.../asm.hb.v16.a0002120 4. Natchman E.S. , Metal Cutting and Grinding Operations , Machining , Vol 16 , ASM Handbook , ASM International , 1989 , p 126 – 127 10.31399/asm.hb.v16.a0002128 5. Weindel H.F. , Tool. Prod. , Nov 1981 6. Finn M.E. , Machining of Carbon...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001291
EISBN: 978-1-62708-215-0
... from defects similar to those investigated in this study. It is clear that the safe-life of this component is severely compromised by this type of defect, a type which could be avoided by proper grinding procedure and post grinding inspection. ...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001242
EISBN: 978-1-62708-223-5
...) according to DIN 17200. Microstructural examination showed the shaft had ran hot, and there were no material defects. The shaft probably was overstressed by torsion forces. The presence of surface checks on both sides of the cam lobe that were filled with bearing metal proved that overstressing occurred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001260
EISBN: 978-1-62708-235-8
... lengths, the longer ones being 100 mm in length and smaller ones about 10 to 20 mm. The cracks were not continuous but in the same line. It was apparent the defective areas were continuous but in some areas the cracks were removed in centreless grinding, which might be due to the greater depth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046028
EISBN: 978-1-62708-235-8
... at a depth of 0.025 mm (0.001 in.) in this layer was 52 HRC (a minimum of 55 HRC was specified). Thus, the failure was caused by brittle fracture in the hardness-transition zone as the result of excessive impact loading. The burned layer indicated that the cracks had been caused by improper grinding after...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
...) 120–150Contra 2 Note: Comp, complementary (platen and speciman holder both rotate in same direction). Contra, platen and specimen holder rotate in opposite directions Four-step contemporary practice for steels using a rigid grinding disc Table 3 Four-step contemporary practice...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006837
EISBN: 978-1-62708-329-4
... region Fig. 21 Fracture-initiation location indicated by arrow Fig. 22 Secondary cracking emanating from pitting on the failed journal Fig. 23 Failed stub secondary cracking. Grinding marks bisect the corrosion product Fig. 24 Mate axle with pitting corrosion...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001068
EISBN: 978-1-62708-214-3
... was attached, the tank surfaces were cleaned and passivated. Fig. 1 Diagram of tank. Dimensions are in millimeters. After fabrication, gamma radiography and dye penetrant testing revealed no defects in any of the tanks. Following hydrostatic and helium leak (under pressure) tests, the tanks were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001675
EISBN: 978-1-62708-220-4
..., 170 MPa, and 30%. The part analyzed was sectioned in the area where the localized cracks originated ( Figure 4 ). Figure 5 shows the general appearance of the defects. Note that the repair weld bead seen in Figure 2 was applied without all the defects having been removed by grinding...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001129
EISBN: 978-1-62708-214-3
... show various views of the fracture surface. Fig. 1 Overall view of fracture surface. ∼0.2×. Fig. 2 Closeup view of areas A and A'. Note dark and light regions. Pipes and blowholes are present as weld defects. ∼0.5×. Fig. 3 Corner section. Heavy grinding marks on the weld...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
... in cold-working and hot-working applications. It reviews problems introduced during mechanical design, materials selection, machining, heat treating, finish grinding, and tool and die operation. The brittle fracture of rehardened high-speed steels is also considered. Finally, failures due to seams or laps...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001425
EISBN: 978-1-62708-235-8
... clearly visible, as shown in Figure 5 , no leakage was observed. Fig. 5 Defect act weld. Examination of a section through the pipe containing the defect, obtained by progressive grinding away, showed this to be a scarfwelded pipe, only about half the section of the scarf having been...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
.... 10 Grinding cracks caused by failure to temper a part. (a) Two dies made from AISI D2 tool steel that cracked after finish grinding (cracks accentuated with magnetic particles). (b) Macroetching (10% aqueous nitric acid) of the end faces revealed grinding scorch. These dies were not tempered after...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0047432
EISBN: 978-1-62708-224-2
... at an incomplete penetration defect at the root of the fabrication weld. As a result of this failure, steps were taken to ensure that good welding practice (back-gouging) would be followed in the future fabrication of these links. Penetration Stress concentration Weld defects Low-alloy steel Fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
.... The investigation results suggest that the root cause of failure was a forging lap that occurred during manufacturing. Precracks induced by the forging defect and the influence of preload stress (due to bolt torque) caused the premature failure. cable clamps brittle fracture forging overlap copper alloy...