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ductile striation formation

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Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002349
EISBN: 978-1-62708-193-1
... the cause of cracking or crack growth. This article discusses the macroscopic and microscopic basis of understanding and modeling fracture resistance of metals. It describes the four major types of failure modes in engineering alloys, namely, dimpled rupture, ductile striation formation, cleavage...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002352
EISBN: 978-1-62708-193-1
..., growth rates, and striation spacings of fatigue crack. The mechanisms of fatigue striation formation are also discussed. The fatigue crack growth in duplex microstructures and cyclic crack growth in polymers are reviewed. The article also describes the mechanisms and models of fatigue crack closure...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006323
EISBN: 978-1-62708-179-5
... microscopy (SEM). Source: Ref 9 Fig. 7 Fracture surfaces of ausferritic ductile iron (ASTM A536, 200-75-02 grade) showing microvoid formation in the metallic matrix. (a) Fracture surface generated from quasi-static loading at 20 °C (68 °F). (b) Fracture surface generated from impact loading at 20...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
...): Monotonic versus fatigue fracture: Beach marks and striations indicate fatigue, but their absence does not confirm fracture from monotonic loads. Fracture surfaces from fatigue do not always reveal beach marks and fatigue striations. Macroscale ductile versus brittle fracture: Macroscale ductile...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... montonic versus fatigue fracture and ductile versus brittle fractures (on either a macroscale or microscale): Monotonic versus fatigue fracture: Beach marks and striations indicate fatigue, but their absence does not confirm fracture from monotonic loads. Fracture surfaces from fatigue do...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003466
EISBN: 978-1-62708-195-5
... in these thermoplastic materials also tend to take on a somewhat irregular shape, often following the ductile matrix material; in brittle thermoset composites, the striations are generally sharp and regular and follow a relatively flat fracture path. Additionally, another feature indicative of fatigue has been noted...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000609
EISBN: 978-1-62708-181-8
.... Direction of FCP is toward the top. Fig. 581 : Area of fracture surface not near inclusion formations shows primarily ductile fatigue striations. Also note secondary cracking. Through-thickness (S-T orientation) FCP specimen at Δ K = 55 MPa m (50 ksi in. ). SEM, 1020×. Fig. 582 and 583...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000621
EISBN: 978-1-62708-181-8
... . It is believed that the steplike formations resulted from a slip mechanism. Secondary cracks are not visible. See also Fig. 1026 . SEM, 1000× Fig. 1026 Area outlined by the rectangle in Fig. 1025 , as seen at triple the magnification there. Fatigue striations, which are about an order of magnitude...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003226
EISBN: 978-1-62708-199-3
...). 3× Fatigue Marks The formation of cracks under conditions of repeated or cyclic stress has been denoted as fatigue cracking. Zones of crack propagation on fatigue fractures exhibit several types of surface marks, such as beach marks, striations, and ratchet marks. Beach Marks...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... striations. Features such as postfracture mechanical damage often exhibit fine, parallel marks or scratches ( Fig. 46 ). Overload fracture of relatively tough and ductile materials can display fine, local markings produced by slip processes associated with monotonic loading. Such slip traces, known...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005657
EISBN: 978-1-62708-198-6
... fatigue Fig. 15 SEM image of fatigue striations in 304 stainless steel dental wire Not all microscopic striated fracture surface features are fatigue striations. Fracture surface rubbing commonly results in parallel ridges that resemble fatigue striations; very ductile fractures can...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... and are not indicative of progressive stable crack growth ( Fig. 29 and 30 ). Similarly, curved ridges can form during ductile overload of low-alloy steel ( Fig. 31 ). Transitions in fracture mechanism (e.g., from ductile microvoid formation to brittle fracture) can also produce curved marks on fracture surfaces...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001835
EISBN: 978-1-62708-181-8
..., and are applied fracture on microscopic level. Ductile fractures are those that occur by microvoid formation and coalescence, whereas brittle fractures can occur by either transgranular (cleavage, quasicleavage, or fatigue) or intergranular cracking. Intergranular fractures are specific to certain conditions...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000614
EISBN: 978-1-62708-181-8
..., fibrous fracture, crack-initiation zone, microvoid coalescence, fatigue-crack surface, hydrogen embrittlement, and fatigue striations of these steels. fatigue fracture fractograph maraging steel shrinkage cavities tensile-test fracture Fig. 798 Surface of a fracture in a tensile-test...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... surfaces, to determine the cause of failure. The fracture modes such as ductile fractures and brittle fractures are reviewed. The article also presents a detailed account of various fracture surface features. It concludes with several cases of field failure in various polymers that illustrate...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000610
EISBN: 978-1-62708-181-8
... candy fracture, cleavage fracture, brittle fracture, high-cycle fatigue fracture, fatigue striations, hydrogen-embrittlement failure, creep crack propagation, fatigue crack nucleation, intergranular creep fracture, torsional overload fracture, stress-corrosion cracking, and grain-boundary damage...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001819
EISBN: 978-1-62708-180-1
... is different for the various types of implants and applications. The required mechanical strength of orthopedic implants also varies and depends on the shape of the implant and the application. Good ductility (discussed below) is often desired. The following is a list of major standards for orthopedic...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
... examination at higher magnifications by light microscopy, SEM, or replica transmission electron microscopy (TEM) to determine the fracture mode, to confirm the fracture mechanism (observation of cleavage facets, ductile dimples, fatigue striations, and so on), and to detect features at the fracture origin...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000601
EISBN: 978-1-62708-181-8
... fracture; cleavage fracture; notch-impact fracture; oxide inclusions and blowholes; ductile rupture; impact fracture and tensile-test fracture surfaces; fatigue striations; and crack initiation and propagation of pure irons. cleavage fracture ductile fracture fractograph grain boundaries impact...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001831
EISBN: 978-1-62708-181-8
... the assumption that oxidation reduces slip reversal during crack closure, which results in the formation of striations ( Ref 19 , 25 , 26 ). The lack of oxidation in hard vacuum promotes a more complete slip reversal ( Ref 27 ), which results in a smooth and relatively featureless fatigue fracture surface...