1-20 of 346 Search Results for

microcracking

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 Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005982
EISBN: 978-1-62708-168-9
... formation and causes of microcracks. The article discusses the effects of alloying elements on hardenability, the effects of excessive retained austenite and massive carbides on fatigue resistance, the effects of residual stresses and internal oxidation on fatigue performance of carburized steels. In...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005967
EISBN: 978-1-62708-166-5
... article illustrates the use of carbon restoration on decarburized spring steels. Different geometric models for carbide formation are shown schematically. The article also describes the different microstructural features such as grain size, microcracks, microsegregation, and banding. carbides...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009079
EISBN: 978-1-62708-177-1
... Abstract This article describes the microcrack analysis of composite materials using bright-field illumination, polarized light, dyes, dark-field illumination, and epi-fluorescence. bright-field illumination composite materials dark-field illumination dyes epi-fluorescence microcrack...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002353
EISBN: 978-1-62708-193-1
..., initiation of one or more microcracks, propagation or coalescence of microcracks to form one or more microcracks, and propagation of one or more macrocracks. coalescence crack propagation cyclic stress fatigue crack initiation fatigue damage fatigue failure metals microcracks plastic strain...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002355
EISBN: 978-1-62708-193-1
... Abstract This article presents an overview of fatigue crack nucleation from the point of view of the material microstructure and its evolution during cycling. It describes the sites of microcrack nucleation at the free surfaces. The article discusses the relation of dislocation structures and...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000604
EISBN: 978-1-62708-181-8
... sequence, localized plastic deformation, and microcrack initiation and propagation of these irons. crack initiation crack propagation fractography malleable iron microcracking white cast iron Fracture sequence (increasing strain) illustrating localized plastic deformation and microcrack...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000603
EISBN: 978-1-62708-181-8
...; and microcrack initiation and propagation. brittle fracture cleavage fracture fatigue cracks fatigue fracture ferritic ductile iron fractographs microcracking pearlitic ductile iron Brittle cleavage fracture of ductile iron spur gear (ASTM A536, grade 100-70-03) due to improper heat...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000618
EISBN: 978-1-62708-181-8
... fracture, microcrack, and stair-step fracture surface of these alloys. cobalt alloys fatigue fracture fractograph surgical implants Fatigue fracture of a cast Vitallium (Co-30Cr-7Mo) surgical implant (side plate of Jewett nail) due to improper insertion. A tool used by the surgeon to contour...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000630
EISBN: 978-1-62708-181-8
... Quasi-brittle fatigue crack propagation in 3.2-mm (0.13-in.) thick polycarbonate sheet. Arrow indicates direction of crack growth. At this thickness, polycarbonate shows features characteristic of both brittle (microcracking) and ductile (thinning and fibrillation) fracture. Note “river patterns” on the...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009075
EISBN: 978-1-62708-177-1
... through the lens to the eye. Therefore, the flat surfaces are bright using this illumination technique, but any voids, microcracks, or indentations are darker because the light is reflected off the sample at an angle. Bright-field illumination is particularly useful for imaging samples for ply counts...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003299
EISBN: 978-1-62708-176-4
.... The stress concentration can lead to premature failure (e.g., chipping) of the ceramic by initiating microcracking at these locations. This problem can be reduced by sandwiching the ceramic specimen between two identical high-strength tungsten-carbide (WC) inserts and placing this whole assembly in...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009085
EISBN: 978-1-62708-177-1
... is much more visible. Figure 3(b) shows the damage from interply arcing between carbon fibers and microcracking in the Kevlar stitch. In the lightning damage zone, there was significant microcracking and delamination, as can be seen in Fig. 4 . Figure 5 shows an area under the lightning strike...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009083
EISBN: 978-1-62708-177-1
... after testing is shown in Fig. 6(a) . Almost complete core failure can be observed in this micrograph. To highlight the microcracks in the aramid fiber facesheet, DYKEM Steel Red dye (Illinois Tool Works, Inc.) was applied on the surface of the composite ( Fig. 6b ) and was shown to penetrate through...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002418
EISBN: 978-1-62708-193-1
... deformations that occur in reinforcing phases through transformations ( Ref 6 , 7 , 8 , 9 ), microcracking ( Ref 10 , 11 ), and twinning, as well as plasticity ( Ref 13 , 14 ), and internal friction ( Ref 4 , 5 ). Toughening is manifest as a fracture resistance, Γ R , that increases with crack extension...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003468
EISBN: 978-1-62708-195-5
... of fatigue, sometimes in the first loading cycle, and rapidly initiate microcracks in the surrounding matrix. This is due to the high strain concentration produced by the intersection of microcracks in reinforcement particles with the surrounding matrix. This mechanism is most commonly observed in...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003833
EISBN: 978-1-62708-183-2
... activation prior to chromium plating to ensure adhesion of the chromium to the inner layer. Corrosion of hard chromium deposits usually begins at microcracks or intersections of microcracks ( Ref 20 ). After moderate acid attack in hydrochloric, sulfuric, or acetic acid, the corrosion reveals the...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003469
EISBN: 978-1-62708-195-5
... loading results in multiple cracks in the matrix, spaced about 300 µm apart. Such microcracking can eventually lead to environmental degradation and possible brittle fracture of the composite. Fig. 7 Changes in macroscopic fracture with increasing temperatures. Fracture mirrors on pulled-out fiber...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002356
EISBN: 978-1-62708-193-1
... , including crack nucleation and microcrack growth The crack growth period , covering the growth of a visible crack ( Fig. 2 ) There is an obvious question of defining the transition from the initiation period to the crack growth period, but that will be addressed later. Fig. 2 Different phases...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002417
EISBN: 978-1-62708-193-1
... cavities to nucleate and grow along the whisker-matrix interface and matrix grain boundaries. The resulting development of microscopic flaws in the composite is manifested as a diffuse microcrack zone ahead of a tensile fatigue crack. The presence of open microcracks in the fully unloaded state is...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002366
EISBN: 978-1-62708-193-1
...-dominated growth of microcracks are discussed, along with some observations regarding the influence of combined stress state on the propagation of small cracks. Finally, several other features of multiaxial fatigue are discussed, including mean stress effects, sequences of stress/strain amplitude or...