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mechanical polishing

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
..., weaves, or naps are available for metallographic polishing. Napless or low-nap cloths are recommended for rough polishing with diamond abrasive compounds. Napless, low-, medium-, and, occasionally, high-nap cloths are used for final polishing. This step should be brief to minimize relief. Mechanical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048420
EISBN: 978-1-62708-226-6
...Abstract Abstract Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head was studied. The attack on the 316LR stainless steel was only shallow. Mechanical grinding and polishing structures were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001162
EISBN: 978-1-62708-220-4
... and then dry on grade 600 paper which had been rubbed over with wax. Since in view of the thinness of the specimens (0.15 mm) only poor results as regards edge and crack edge definition could be achieved with electrolytic polishing, the tin sections were prepared by mechanical methods. They were first...
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
..., chemical analysis, mechanical testing, as-polished 54x magnification, etched with nital 33x/54x/215x/230x magnification) supported the conclusions that the NDE indications were the consequence of a cold-shut condition in the casting. The cold shut served as a stress-concentration site and was therefore...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001667
EISBN: 978-1-62708-235-8
... the polishing rate of the titanium. The presence of this active chemical reagent increases the removal rate of pre-existing abrasion and polishing damage of the specimen and provides a superior final surface finish over mechanical polishing alone [ 2 ]. (Note: Extreme care and safety precautions must...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001825
EISBN: 978-1-62708-241-9
... surface and appeared to have been mechanically polished. Both tube sections had loose, light tan deposits on the inner surface. There were also a few areas of loose darker brown deposits on the inner surface. A longitudinal seam weld and the circumferential weld were visible on the inner surface...
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
... Sectioning Mounting Edge Preservation Grinding Polishing Electrolytic Polishing Those who regularly perform failure analysis studies occasionally encounter situations where the specimen must be examined in the field. Portable equipment ( Ref 33 , 34 ) is available for either mechanical...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001768
EISBN: 978-1-62708-241-9
... and mechanically polished by conventional metallographic procedures. The polished samples were etched in 2% nital solution for microstructural examinations. Samples were taken both from heel and edge portions of the angle and were studied both in unetched and etched conditions. Scanning electron microscopy...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001108
EISBN: 978-1-62708-214-3
...) and straight parts revealed that the cracks initiated at the outer surface by a combined mechanism of creep and intergranular embrittlement. A smaller grain size resulting from cold bending fabrication procedures for the curved parts was responsible for accelerating the embrittlement. It was recommended...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001839
EISBN: 978-1-62708-241-9
... completely ruled out the possibility of chloride-induced stress corrosion cracking (CSCC) mechanism and indicated an HE or hydrogen-induced cracking (HIC) phenomenon at play. Figures 3 and 4 show the light optical micrographs of polished, unetched coil specimens. The optical micrographs reveal...
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
... evaluation of the failure mechanisms. Microfractographic examination can be conducted in several ways, including direct methods involving light microscopy and scanning electron microscopy and indirect methods involving replicas that can be examined by light microscopy or by scanning or transmission...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... Energy-Dispersive X-Ray Analysis Electron Probe Microanalysis Auger Electron Spectroscopy Secondary Ion Mass Spectroscopy X-Ray Powder Diffraction Cutting Mounting Mechanical Preparation (Grinding and Polishing) Ceramographic Etching Hardness Determination by Microindentation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001489
EISBN: 978-1-62708-217-4
... impact loading; the comparison is being made with the polished surfaces and the tensile specimen fracture surfaces. The inclusions in the failed retaining ring were compared with the ones in a similar component obtained from a used engine. In the case of the latter, a large number of fine and elongated...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
...Abstract Abstract A 2–3 mm thick electroformed nickel mold showed early cracking under thermal load cycles. To determine the root cause, investigators obtained monotonic and cyclic properties of electroformed nickel at various temperatures and identified possible fatigue mechanisms...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001753
EISBN: 978-1-62708-241-9
... of the fractured tailwheel fork. It was reported that the tailwheel and the right-side fork leg were found still attached, the left-side axle pin joint was found on the landing strip, and the remnant body of the fractured tailwheel fork was still attached to the airplane after failure. The mechanical damage...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001849
EISBN: 978-1-62708-241-9
... rolls and often leads to serious damage to the mill. Spalling is related to the thermal and mechanical stresses applied to the roll during service and is an indication of abnormal mill operation and/or poor material quality (e.g., impurity content, improper heat treatment). The effect of roll...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001059
EISBN: 978-1-62708-214-3
... Metallography Chemical Analysis/Identification Mechanical Properties Stress Analysis Field metallography and replication are extremely useful tools when a fast, nondestructive damage assessment is needed on a vessel in service. In this instance, a type 316 stainless steel column was suspected...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001343
EISBN: 978-1-62708-215-0
... Metallography Mechanical Properties Optical microscopic examination of the leaking portion of the stainless steel pipe established that the leak was caused by SCC. The crack originated on the outer surface of the pipe and penetrated through the wall thickness. Longitudinal scratch marks were observed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... in a laboratory, the requirements for on-site testing may involve the use of portable laboratories with metallographic equipment for grinding, mechanical polishing, and etching. Small specimens can be cut from a part on the site for preparation, examination, and photography immediately or upon return to a fully...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001769
EISBN: 978-1-62708-241-9
.... , Hoch A.R.V. , Reddy M.M. : An assessment of calcite crystal growth mechanisms based on crystal size distributions . Geochim. Cosmochim. Acta 64 , 2937 – 2950 ( 2000 ) 10.1016/S0016-7037(00)00394-X 4. Beveridge T.J. , Meloche J.D. , Fyfe W.S. , Murray R.G.E...