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secondary-tension test

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0091036
EISBN: 978-1-62708-227-3
... Abstract Socket head cap screws used in a naval application were failing in service due to delayed fracture. The standard ASTM A 574 screws were zinc plated and dichromate coated. Investigation (visual inspection, 1187 SEM images, chemical analysis, and tension testing) of both the failed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001091
EISBN: 978-1-62708-214-3
.... These fracture initiation sites are inclined to the main fracture surface and have a helicoidal surface. This surface is the tension plane due to torsion on the bar. The texture of fracture at these origins is typical of fatigue. Testing Procedure and Results Surface Examination Scanning Electron...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0090994
EISBN: 978-1-62708-225-9
... Abstract Two large tension springs fractured during installation. The springs were manufactured from a grade 9254 chromium-silicon steel spring wire. The associated material specification allows wire in the cold-drawn or oil-tempered (quenched-and-tempered) condition. The specified wire tensile...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001682
EISBN: 978-1-62708-229-7
... to the reactors systems. The restart of the production reactors included hydraulic testing of the primary and secondary cooling systems of the K-reactor. During this testing, a crack developed in a convolute of an expansion joint in the secondary cooling water system. This crack provided a path for river water...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001148
EISBN: 978-1-62708-228-0
..., center and lower right at 1500× and 15×). Tension and Flattening Ring Tests Three tension test coupons with 1.5″ (3.8cm) wide by 4″ (10.2cm) long reduced sections were machined from the portion of the pipeline that did not fail in service. Two of these specimens were in the transverse direction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001231
EISBN: 978-1-62708-232-7
... and tooth bottom. The remaining failure was a fine-grained ductile fracture. It was found that the teeth were not supported uniformly over the entire width and were thus overloaded on one side. The transition from the tooth flanks to the tooth bottom was sharp-edged, causing a tension peak there. The tooth...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001377
EISBN: 978-1-62708-215-0
... several bolt failures occurred, as shown in Table 3 . Bolts from both suppliers (A and B) failed under these high H 2 S concentration conditions, but with further testing at lower bolt tension, the frequency of failures was lower with vendor A bolts. Charging with dry bottled H 2 S did not produce...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0007736
EISBN: 978-1-62708-219-8
... Abstract Single 6.4 mm (0.25 in.) post-tensioning wires failed in a parking garage in the southern portion of the United States. Several failed wires were removed and the lengths were examined for signs of corrosion using SEM metallography. The scans showed localized shallow pitting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001659
EISBN: 978-1-62708-231-0
... along the secondary crack noted in Figure 3 . Figure 5 shows the shell and the detail fracture. The top view of the shell is shown in Figure 6 . Based on the flow pattern of the material, it is suspected that the shell may have initiated along the line AB in Figure 6 and grown laterally...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
... reduced mechanical properties including tension and compression in the bias direction as compared to nozzles which passed proof tests. Warp direction mechanical properties could not be used to predict pass or fail in a proof test. II. Nozzle Insulation History in Proof Testing The convergent...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001295
EISBN: 978-1-62708-215-0
... to vary the tension in the wire. Shock loading was obtained by firing a “bullet” at the rear of the cylinder, as shown in Fig. 1 . The wire was fitted with strain gauges to measure the static and dynamic strains and loads on the wire via a digital oscilloscope. Fig. 1 Schematic of impact testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001733
EISBN: 978-1-62708-225-9
... Abstract Drive cables from a rubber processing machine were failing in less than 8 h of operation, the expected service life being much greater than 100 h. Comparison cables were tested to failure under known stress conditions, including tensile overload, torsional loading, reversed bending...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... changes to maintain constant stress on the specimen. Constant-stress testing is used to accurately determine differences between the temperature dependence and the stress dependence of creep behavior. In general, the form of creep strain (in the form of primary, secondary, and tertiary stages) under...
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
... by standards of the American Society for Testing and Materials (ASTM) and the International Organization for Standardization (ISO), as listed below, and by other national standards. These materials are corrosion resistant and well accepted by body tissues (biocompatible) and therefore satisfy two of the basic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... the creep rate. The process of secondary creep thus may be more complicated than a constant, steady-state mechanistic condition. Nonetheless, the observation of steady creep rates over a large portion of creep-test curves is an important empirical result with practical value. The concept of a steady-state...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001677
EISBN: 978-1-62708-222-8
... and the bottom bowl of the spoon was available for analysis. Five strips of material were cut out of the bowl of the spoon using an abrasive cutoff saw. The strips were approximately 5-mm wide, 1-mm thick and 35-mm long. Two of these strips were tested in tension after further reducing a middle gage length...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001721
EISBN: 978-1-62708-225-9
... -13 inch bonnet screw cracked at the midway point. Fracture surfaces were obtained by pulling the screws in tension in a special bolt pulling fixture using a universal servo-hydraulic tension testing machine. After complete fracture, the two samples were rinsed and cleaned with methanol to remove any...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
... is considered to have superplastic behavior when it shows extremely high and uniform elongations (from 100 to 1000%) under tension stress: a lack of localized necking or a series of diffuse necks along the test zone resulting from a combination of the creep tension stress and the strain rate suffered...
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
... a straight line. This stress-strain response is termed linear elastic behavior because the stress is proportional to the strain, and on unloading, the specimen will return to its original dimensions. Fig. 15 Typical load-displacement curve for a ductile polymer tested in uniaxial tension...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006865
EISBN: 978-1-62708-395-9
... of temperature and strain rate. In a tensile test, a specimen containing no stress concentration is stretched at a constant rate until fracture. The stress in the specimen is essentially uniform uniaxial tension until onset of yield and then again after chains are oriented. Figure 15 shows the tensile load...