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test specimen design

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Published: 01 June 2019
Fig. 11 Annealing tests with specimens from flange disk. 1 × (see additional designation at fractures) More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... overtemperature lead specimen approach was taken, whereby failure of a test specimen in the laboratory would precede failures in the plant. These tests revealed approximately a 2:1 difference in life for the base metal as compared to weld metal. Electric power generation Outlet header Superheaters Welded...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006909
EISBN: 978-1-62708-395-9
...), estimating the long-term performance or life expectancy of components designed to operate without failure or loss of functionality for 10 to 20 years (or longer) is difficult. Few, if any, products or components can be expected to fail or degrade substantially when tested at normal (unaccelerated) conditions...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006928
EISBN: 978-1-62708-395-9
..., the test specimen is either a standard type I or II bar, in accordance with ASTM D638, that is preconditioned to ASTM D618 specifications. The test apparatus is designed to ensure that the applied force does not vary with time and is coaxial with the specimen. As with other tests, the test specimen must...
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
... are designed to give a quantitative result and have an objective endpoint. In contrast, bending ductility tests give a pass/fail result with a subjective endpoint; the test operator judges whether a surface has undergone cracking. Test procedures and specimen-preparation methods have evolved without close...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006919
EISBN: 978-1-62708-395-9
... design requirements. Perhaps three of the most commonly used tests for impact performance are the Izod and Charpy notched-beam tests and the dart penetration test. Each is briefly discussed as follows. The Izod and Charpy tests are very similar in that they are both notched-beam specimens subjected...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0046155
EISBN: 978-1-62708-233-4
... Abstract A structure had been undergoing fatigue testing for several months when a post-like member heat treated to a tensile strength of 1517 to 1655 MPa (220 to 240 ksi) ruptured. The fracture occurred in the fillet of the post that contacted the edge of a carry-through box bolted...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047632
EISBN: 978-1-62708-235-8
... boss on one side. After annealing, hot spinning, annealing a second time, and tack welding a port fitting, the assembly was torch preheated to 120 to 150 deg C (250 to 300 deg F). The port fitting was then welded in place. Final full heat treatment to the T62 temper was followed by machining, testing...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
... and elevated temperature have not received much attention even though such properties should be known for the design and application of electroformed nickel parts. Monotonic and cyclic testing, metallographic testing, and finite element analysis of an electroformed pure nickel mould under cyclic thermal...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001759
EISBN: 978-1-62708-241-9
... For push-out force checking, load testing rig was used. Fig. 5 shows load testing rig. Fig. 5 Load testing rig It consists of rotating handle screw connected to shaft, which in turn exerts the applied load on specimen, and analog pointer shows the magnitude of the load applied on specimen...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001130
EISBN: 978-1-62708-214-3
... fracture surface section to a position two hole-rows away. The remainder was left as received for future tests by the manufacturer. One specimen was prepared for scanning electron microscope (SEM) fractographic examination, four specimens were cut for tensile and ductility testing, and one tab...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001294
EISBN: 978-1-62708-215-0
... assembly passes a preflight helium pressure test. However a future design should use the same material for the poppet and bellows so that the final heat treatment will produce an assembly not susceptible to IGA. Booster rockets Heating effects Sensitizing Tempering UNS S35500 UNS S35080 AM355...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001108
EISBN: 978-1-62708-214-3
.... Fig. 2 Metallographic sample (a) and tensile test specimen (b) from the pigtail tubing. Visual Examination of General Physical Features Visual and low-magnification optical examination of the samples revealed evidence of perforation only in the curved parts. No major distortion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001151
EISBN: 978-1-62708-219-8
... test results on the spliced angle iron sections. A specimen being tensile tested is shown in Fig. 8 . This particular specimen included the pair of angle iron sections containing a splice and the splice bar. Of the thirty specimen tested, twenty-five were single specimens and only five were pairs...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001378
EISBN: 978-1-62708-215-0
... face of the boss in contact with the die. Use roll forming rather than machine cutting for the threads. Devise a design that allows a wrench to engage the boss to allow insertion or removal of the stud bolt (for example, a hexagonal or square-headed boss). Conduct nondestructive testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001656
EISBN: 978-1-62708-219-8
... tested in sea water. It can be seen from Figure 8 that, unlike the former specimen, neither initiation site A1 nor A2 are located at the intersection of a longitudinal and a transverse lug. This, and the fact that there are more than one initiation site, shows that the corrosive environment...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001065
EISBN: 978-1-62708-214-3
... from the failure were evaluated. The first specimen contained material from the pipe, elbow, and weld. Chemical analysis samples and an optical mount were cut from this specimen, and the balance of the material was used for mechanical testing. Two additional samples had a mottled, granular...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001312
EISBN: 978-1-62708-215-0
... . Fig. 9 Typical microhardness variations in the lower tubular portion Tensile Properties To study the effect of brazing on the mechanical properties of copper tube in the HAZ, miniaturized tensile test specimens were taken from the annealed region (near the upper cup portion) as well...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001329
EISBN: 978-1-62708-215-0
... factors, the information presented should be viewed from a qualitative, rather than quantitative, perspective. Results of EDS scans (semiquantitative analysis) Table 1 Results of EDS scans (semiquantitative analysis) Specimen Composition, % EDS scan Mill test report Cu Al...