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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001174
EISBN: 978-1-62708-220-4
... externally to room temperature in this unit. The fracture had the typical flat-gray fibrous structure of a material destroyed by hydrogen. Specimens for the metallographic investigation showed that the structure appeared to have been loosened by intergranular separations. DVM notched impact specimens from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001259
EISBN: 978-1-62708-233-4
... by the bolt manufacturer on notched bars showed that quench cracks did not occur if the specimens were turned down before hardening or if the notch was not beaten by a chisel, but was machined. Reference Reference 1. Bühler H. , Herrmann E , Einfluβ einer Randent-kohlung auf die Riβgefahr...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c9001565
EISBN: 978-1-62708-230-3
... was 190 deg C (375 deg F) and the solution contained approximately 700 ppm chlorides. Liquid penetrant inspection of the pipeline showed the leaks were numerous and confined adjacent to the welds. A metallographic specimen from the circumferential weld showed the cracks initiated at the inside surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001175
EISBN: 978-1-62708-231-0
...% Cu. The mean value of the yield point was 24 (24) kg/sq mm, the tensile strength 39 (38) kg/sq mm, the elongation at fracture, d10, 26 (24)%, the necking at fracture 71 (66)% and notch impact value 11.5 (9.4) kgm/sq cm (the values in brackets are for the transverse direction). The specimen from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001660
EISBN: 978-1-62708-236-5
.... The fractures propagated by microvoid coalescence typical of that observed in notched tensile specimen fractures of the same material. For comparison, Ti-6Al-4V fasteners from various commercial sources were tested to failure in uniaxial tension and examined in the SEM. In all cases, the fracture appearances...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001534
EISBN: 978-1-62708-220-4
... specimens with respect to that for standard specimens can be given by: (Eq 1) d T = 0.7 ( 10 − w ) 2 where dT is the reduction in testing temperature from that required for a standard Charpy V-notch specimen (in degrees Celsius), and w is the specimen width along the notch...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001471
EISBN: 978-1-62708-221-1
.... An unnotched specimen, cut from the intrados of the hook and tested with the wearing surface on the tension side, bent to 90° satisfactorily but a second, in the tension side of which a shallow notch had been cut by means of a fine saw (since no further “natural” notched specimens were available), fractured...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... concepts. bending brittle fracture compression failure deformation ductile crack nucleation ductile fracture ductility fractography manufacturing imperfections metals microvoid coalescence notched specimen plastic flow root cause failure analysis single-crystal cleavage models specimen...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
.... When edge- or center-notched plate specimens are fractured in tensile loading, a portion or all of the fracture surface behind the notch can be normal (perpendicular) to the applied load, and there may be little macroscale indication of transverse contraction to indicate plastic flow prior to fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
... of the evidence pointed to a change in the susceptibility of the plates to brittle failure near the point of failure initiation. Charpy V-notch specimens that were aged under either tensile or compressive stress at 180 °C (360 °F) for 168 h were found to lose about half their impact energy absorption from about...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001261
EISBN: 978-1-62708-219-8
... Tensile Strength Elongation Reduction in Area upper lower L O = 5d kp/mm 2 kp/mm 2 kp/mm 2 % % 21,8 21,7 35,3 35,5 70 23,7 23,0 35,5 38,4 70 Figure 5 shows notch impact toughness as a function of testing temperature of ISO-V-notch specimens. The values at + 40...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001685
EISBN: 978-1-62708-235-8
... raiser in this case was a large inclusion cluster or another pit. The effect of a notch or inclusion cluster on ductile properties is evident from the notched tensile specimen study. Some of the larger inclusion clusters observed in premature tensile specimen failures were similar in size...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048795
EISBN: 978-1-62708-220-4
... fracture surface; arrow points to facet at fracture origin. (d) Enlarged view of region at arrow in (c). 5.5×. (e) Charpy V-notch impact-strength values of specimens from weld area, both as-fractured and after retempering at 650 °C (1200 °F) for 6 h. Source: Ref 1 The failure did extensive damage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001550
EISBN: 978-1-62708-228-0
... (380 to 410 MPa) ultimate, and 27% minimum elongation. The results of the impact tests using Charpy V-notch specimens are shown in Fig. 5 , and it can be seen that the DBTT is very high. As the fire damage would have tended to lower this and improve toughness, it is clear that the original...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001477
EISBN: 978-1-62708-229-7
... of curve = 71°C Average = 71°C The specified impact values of 6 Kpm/cm 2 relate to the DVM type of specimen employing a “U” notch — the values quoted above were those given by specimens utilising a “V” notch. Unfortunately, it is not possible to equate results from the two forms of test...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001822
EISBN: 978-1-62708-180-1
.... The fracture is transgranular. Etched with 4% picral. 55× Fig. 21 Examples of axle steel tensile specimens tested at 1100 °C (2010 °F) with the Gleeble, with copper present. The liquid copper has penetrated prior-austenite grain boundaries, producing intergranular fracture. (a) Bottom of notch...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0065827
EISBN: 978-1-62708-221-1
... temper at 940 °F (504 °C), yielding hardness of 59 HRC and absorbed energy of 6.5 to 7.5 ft · lbf (8.8 to 10.2 J) on longitudinal, room-temperature Charpy V-notch specimens. With this tempering practice, all residual retained austenite was eliminated. Knives were made from the above composition...
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
... 428 562 28.61 Specified (ASTM A572 Grade 50) 340 min. 450 min. 17 min Charpy impact tests were conducted using standard V-notched (2 mm deep notch) specimens with 55 × 10 × 10 mm size as per ASTM E-23 specification. The tests were conducted both at ambient (25 °C) and subzero (0, −20...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... is available for the effective use of older S - N data. Many necessary details are often missing. A list of important testing parameters may include: Material properties (microstructure, mechanical characteristics) Type of test sample (smooth or notched specimen, component, size) Specimen...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001835
EISBN: 978-1-62708-241-9
... here is between –40 and +35 °C. Therefore, the current tests are divided into two groups: one under room temperature 20 °C, and the other under –40 °C. Each group includes three new bolts and three broken bolts. The V-notched specimens are shown in Fig. 6 . Fig. 6 The V-notched impact toughness...