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Charpy impact tests

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001146
EISBN: 978-1-62708-229-7
... Abstract A metallurgical failure analysis was performed on pieces of the cracked vent header pipe from the Edwin I. Hatch Unit 2 Nuclear power plant. The analysis consisted of optical microscopy, chemical analysis, mechanical Charpy impact testing, and fractography. It was found that the...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001055
EISBN: 978-1-62708-214-3
... decreasing the operating pressure or by wrapping the air release valves with heat tape to prevent them from freezing shut. Future water lines should be made from semi killed or fully killed steels with a minimum Charpy V-notch impact value of 20 J (15 ft·lbf) at 0 °C (32 °F). Certified mill test results...
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
... thermal cycling high-strength low-alloy steel cracking Charpy impact tests impact toughness ASTM A572 grade 50 (columbium-vanadium steel) References 1. Xu B. , Li H.Y. , Mechanical analysis on the splicing form of cross-section multiple angle steel for...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001079
EISBN: 978-1-62708-214-3
... actual mechanical properties and to determine the metallurgical cause of the observed indications. Samples were examined in a scanning electron microscope and subjected to chemical analysis and several mechanical property tests, including tensile, Charpy V-notch impact, and fracture toughness. The...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
... Requires sufficient thickness of component Pencil hardness Hardness Limited to coatings and surface modifications Impact toughness testing Charpy impact Toughness Requires sufficient material for standard sample size Izod impact Toughness Requires sufficient material for standard sample...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001637
EISBN: 978-1-62708-221-1
... Program, Aug 2002 . 4. Australian Standard AS 1544.2-1989, “Methods for Impact Tests on Metals, Charpy V-Notch,” Standards Australia, 1989 . Selected Reference • Warke W. R. , Stress-Corrosion Cracking , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001004
EISBN: 978-1-62708-229-7
... acid for 10 minutes in an ultrasonic bath. A series of charpy vee-notch impact test specimens were machined from selected studs and full fracture appearance transition temperature, FATT, curves were obtained. Small bar samples, 25mm long, 2mm × 2mm, were machined from broken charpy specimens and...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0091362
EISBN: 978-1-62708-220-4
... 124 134 188 Sound circumferential weld 20 106 126 85 These results confirmed suspicions that failure was due to excessive amounts of nitrogen, carbon, and oxygen. To characterize the condition of the vessel further, Charpy V-notch impact tests were run on the unaffected base metal, the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0089752
EISBN: 978-1-62708-219-8
... vertical position. The joints had then been rewelded on the inside. This had not been done in the third weld that failed later. Charpy V-notch impact tests on the steel used for this pipeline revealed a ductile-to-brittle transition temperature that was unfavorably high—approximately 10 °C (50 °F). At...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001301
EISBN: 978-1-62708-215-0
..., % MPa Ksi MPa Ksi MLR 738 107 607 88 6.0 11.9 MRR 880 127.8 695.7 100.9 7.5 15.2 F 769 111.5 640.5 92.9 2.0 3.1 Charpy impact bars were machined from the three gear segments and tested at −20 °C (0 °F), 0 °C (32 °F), and room temperature—representative of possible...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... or wedge-shaped cracks at grain triple points • Reaction scales or internal precipitation • Some cold flow in last stages of failure Contributing factors • Load exceeded the strength of the part • Check for proper alloy and processing by hardness check or destructive testing, chemical analysis...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001035
EISBN: 978-1-62708-214-3
... outer segment and the unhardened inner core of the axle, subsized Charpy V-notch test coupons were prepared from both areas. Because the hardened outer surface layer was only about 6.4 mm (0.25 in.) thick, careful machining was required. After impact testing at room temperature, the appearance and...
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
... original specification requirements of 30 000 psi (205 MPa) minimum yield, 55 000 to 60 000 psi (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...
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
... structure of the flange forging was revealed by examination. A greater susceptibility to cracking was interpreted from the higher hardenability found within the bands. Stress relief was concluded to have not been performed at the specified temperature level (by hardness and impact tests) which caused the...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001353
EISBN: 978-1-62708-215-0
... tensile properties of the forging material were found to be satisfactory, the notch sensitivity of the material (i.e., its toughness) was extremely poor, as indicated by Charpy impact testing (3.9 J, or 2.9 ft . lbf). The coarse grain structure of the forging, accompanied by inferior chemical composition...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001770
EISBN: 978-1-62708-241-9
... rectangular cross section as per ASTM A 370-97a on Instron 60 universal tensile testing machine at a load rate of 0.50 kN/s at room temperature. Impact test was carried out on Charpy V-notch standard subsize specimens (7.5 × 10 × 55 mm 3 ) as per ASTM E 23-98 on pendulum-type impact testing machine using 300...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001752
EISBN: 978-1-62708-241-9
... incipient melting ultra-low sulfur AMS 6414 steel bars, billets, and bloom samples were made. These “as received” steels were pretested by heat-treatment to crankshaft hardness and Charpy “V” notch (CVN) impact tested to show that no planar dimpled facets (PDF) were present on these impact fractures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001720
EISBN: 978-1-62708-227-3
..., longitudinal, 450×. 2% Nital etch. Charpy impact tests were performed on seven standard specimens obtained from the mainmast tripod sample WB2. Samples were machined with the specimen axis parallel to the longitudinal or rolling direction. Tests were performed on a Tinius Olsen instrumented impact tester...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001196
EISBN: 978-1-62708-224-2
.... The metallographic examination revealed a rather coarse bainitic structure as shown in Fig. 2 , which is an indication that the resistance of the steel to withstand shock loads was low. Shock loads are unavoidable in the operation of a fork lifter. Impact tests (Charpy-V-Notch) on test specimens with...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001444
EISBN: 978-1-62708-231-0
... in. square, and bending them in a press, one piece being notched on the tension side, in the manner of a Charpy test-piece, prior to bending. The plain specimen bent through 60° before fracturing, demonstrating that the unnotched material possessed appreciable ductility, but the notched one fractured...