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Precracked Specimen Testing

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Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003243
EISBN: 978-1-62708-199-3
... determine the susceptibility of alloys to SCC and hydrogen embrittlement, several types of testing are available. This article describes the constant extension testing, constant load testing, constant strain-rate testing for smooth specimens and precracked or notched specimens of SCC. It provides...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003241
EISBN: 978-1-62708-199-3
... indentation. In any event, the thickness of the specimen shall be at least ten times the depth of indentation. The surface finish of the workpiece being tested should be such that the indentation diameter is clearly outlined. The Brinell hardness test has three principal limitations: Size...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
... ( Ref 7 ) In the XRFS technique, the count rate that is obtained from a particular element when a specimen is irradiated is proportional to the concentration of that element. Thus, if the count rate for the element in a sample is compared to the count rate of a standard of known composition, the...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005683
EISBN: 978-1-62708-198-6
... conditions as well as understanding of the results and their possible errors and limitations. The corrosion performance tests of implants and implant materials are carried out in the laboratory ( in vitro ), but the results can and should be eventually supported by analyses of specimens from animal studies...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.9781627081764
EISBN: 978-1-62708-176-4
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003025
EISBN: 978-1-62708-200-6
... is reduced substantially, and processing becomes difficult because of high melt viscosity and tooling abrasion. In tensile testing, the main sources of experimental error are: Poor alignment of the specimen/machine assembly Relative movement between specimen and clamp Inappropriate...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000617
EISBN: 978-1-62708-181-8
... fracture, grain boundaries, notch and fatigue precrack, dimpled rupture, and fatigue striations of these alloys. fractograph intergranular fracture nickel alloys Fig. 867 Surface of a fracture in a bend-test specimen of Nickel 201 containing 0.02% C, 0.35% Mn, 0.01% S, 0.35% Si, 0.25% Cu...
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
... material necking in the simple cross section of a tensile testing specimen (for example, see Fig. 166 in “Medium-Carbon Steels: Atlas of Fractographs,” Fractography , Volume 12 of the ASM Handbook , 1987). The other fracture mode is plane-stress fracture (mode II fracture), which manifests itself as...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001832
EISBN: 978-1-62708-181-8
... the two sides of the fractured part in a tensile-testing machine, if the shape permits, and pulling Placing the specimen in a vise and bending one half away from the other half by striking it with a hammer in a way that will avoid damaging the crack surfaces Gripping the halves of the fracture...
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
... indicates, the work reported in Ref 13 supports such a model of dislocation interaction to create a cleavage nucleus. Specimens tested at 77 K could be made to flow plastically or to fail in a brittle manner, depending on specimen orientation. Specimen axes removed from 〈1,1,0〉 failed in a brittle manner...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005654
EISBN: 978-1-62708-198-6
... prominent. Corrosion fatigue tests can be classified as to whether the main process occurring over the test is crack itiation or propagation. In crack initiation testing, the specimen generally has a smooth surface, and either axial or bending loads are applied. Thus the sample will be subjected to...
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
... images at the same magnification. All four fractographs are of different areas. Figure 6 shows the interface between the fatigue precrack and test fracture of an X-750 nickel-base superalloy subsize Charpy rising-load test specimen after testing in pure water at 95 °C (200 °F). The interface region...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006462
EISBN: 978-1-62708-190-0
... serviceability in order to detect, locate, measure and evaluate flaws; to assess integrity, properties and composition; and measure geometric characteristics.” This approach is in stark philosophical contrast to testing (perhaps destructively) a production-sibling component or material specimen and inferring...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000623
EISBN: 978-1-62708-181-8
... 40 min at 955 °C (1750 °F) and water quenched, aged at 510 °C (950 °F), and tested in hydrogen. (Structure is continuous β phase with dispersed α phase.) The fatigue-precrack region is at left. The tensile-overload region, at right, closely resembles that of the specimen in Fig. 1158 . SEM, 110...
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
... the finely dimpled ductile fracture that occurs between the much larger voids nucleated at graphite nodules. SEM, 2000× (W.L. Bradley, Texas A&M University) Fig. 96 Fatigue precracked region on the fracture surface of a ferritic ductile iron compact tension specimen. Morphology is typical...
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
... (1650 °F), tempered at 620 °C (1150 °F), water quenched, stress relieved at 595 °C (1100 °F), and then air cooled. Δ K = 72 MPa m (65 ksi in. ). Fig. 579 : Elongated features on T-L (standard transverse) orientation FCP test specimen. Direction of FCP is toward the top. This...
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
... alloy that was tested under rotating bending conditions. Compare with Fig. 17(b) . Fig. 19 Fatigue striations in a 2024-T3 aluminum alloy joined by tear ridges Fig. 20 Fatigue striations on adjoining walls on the fracture surface of a commercially pure titanium specimen. (O.E.M...
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
.... These inclusions, which are rich in iron and silicon, are only slightly bonded to the walls of the pockets. SEM, 2800× Fig. 1009 Specimen of aluminum alloy 7075-T6 broken in a slow-bend fracture-toughness test in air. Dark area, at left, is the fatigue-precrack surface, which shows no fatigue...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005324
EISBN: 978-1-62708-187-0
... RT. (b) Grades are listed in a simplified format. See text. Customary units are for information and are not part of Ref 3 . Mechanical properties of test specimens from cast-on samples vary with wall thickness. (c) Customary units are the primary units, and SI unit conversion varies slightly...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003815
EISBN: 978-1-62708-183-2
... precracked thick, double-cantilever beam specimens of high-strength 2 xxx -series aluminum alloy plate, TL (SL) orientation. Specimens were wet twice a day with an aqueous solution of 3.5% NaCl, 23 °C (73 °F). (b) Crack propagation rates in stress-corrosion tests using precracked specimens of 7 xxx -series...