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machined test specimen

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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
... surface condition of the test specimens, particularly smooth specimens, has a significant effect on the test results. Smooth test specimens are often tested with a mechanically (machined or abraded) or (electro)chemically treated surface. It is very important to avoid or to remove machining marks or...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009008
EISBN: 978-1-62708-185-6
... application of the grid marks. Normally, specimen aspect ratios range between 0.75 and 1.75. Tapered and flanged test specimens are machined cylinders with a section of the original surface remaining at midheight, as shown in comparison with the cylindrical compression-test specimen in Fig. 2 . The height...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003044
EISBN: 978-1-62708-200-6
.... Overall specimen length is 229 mm (9 in.), with a test section of 152 mm (6 in.). Specimens should be precision machined from plates with tabs bonded on. The ASTM standard recommends 0°/90° cross-ply tabs made from unidirectional nonwoven E-glass. Other orientations and/or tab materials may prove...
Book

Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.9781627081887
EISBN: 978-1-62708-188-7
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001302
EISBN: 978-1-62708-170-2
..., namely, simulation, acceleration, specimen preparation, control, measurement, and reporting, are reviewed. acceleration coatings erosion test repeatability short testing time simulation specimen preparation wear and erosion test equipment wear test WEAR AND EROSION TESTS have...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... deformation accumulation. The images are of the external surface of nickel-base superalloy test specimens. Both specimens were monotonically tested to an identical inelastic strain. One specimen was tested at room temperature in laboratory air ( Fig. 2a ), and the other was tested at 650 °C (1200 °F) in argon...
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 Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003244
EISBN: 978-1-62708-199-3
... Abstract This article describes the methods and equipments involved in the preparation of specimens for examination by light optical microscopy, scanning electron microscopy, electron microprobe analysis for microindentation hardness testing, and for quantification of microstructural parameters...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003127
EISBN: 978-1-62708-199-3
... frequent error is the assumption that test values determined from these sources should agree. Rather, the properties of separately cast specimens should be expected to be superior to those of specimens machined from the casting. In the absence of more specific guidelines, one rule of thumb defines the...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003128
EISBN: 978-1-62708-199-3
... 14 62 9 71 10.3 852.0 T5 221 32 159 23 5.0 70 159 23 148 21 76 11 71 10.3 Tension and hardness values determined by tests on standard 13 mm ( 1 2 in.) diam test specimens, without surface machining, each cast in permanent mold. (a) At 0.2% offset. (b) 500...
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
... machine and be balanced on the pedestal Vickers hardness Hardness Test is slow Careful surface preparation of the specimen is necessary Measurement of indentation is operator dependent and results in variation Microindentation hardness testing Vickers hardness Hardness Result does not...
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 Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005806
EISBN: 978-1-62708-165-8
... nitrocarburizing and austenitic nitrocarburizing. The article includes a discussion on the difficulties in specimen cleaning, importance of furnace purge, uses of pre and post oxidation, depassivation, or activation, and requirements for perfect nucleation in nitriding process. In nitriding, the successful...
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: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009007
EISBN: 978-1-62708-185-6
... modification of the partial-width indentation test, imposes more severe strain in the rib for testing highly ductile materials. In this test, a hole or a slot is machined in the slab-type specimen adjacent to where the anvils indent the specimen. Preferred dimensions of the hole and slot are given in Fig. 13...
Book Chapter

By Peter J. Blau
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003242
EISBN: 978-1-62708-199-3
... load running on a wheel dynamometer stand), (3) machine subassembly test stand trials (e.g., the transmission of the truck on a dynamometer), (4) sub-scale tests (e.g., a small version of the transmission on a dynamometer), (5) component tests (e.g., a gear-testing machine), and (6) simple specimen...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009013
EISBN: 978-1-62708-185-6
... Wedge test specimen. (a) As-machined specimen. (b) Specimen after deformation. Source: Ref 12 An important practical application of this test helps the process engineer determine the optimal reduction-anneal sequence for obtaining a recrystallized structure after breakdown of a cast ingot. In...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009009
EISBN: 978-1-62708-185-6
... carried out in a servohydraulic machine such as that shown schematically in Fig. 1 . Because strain-rate effects are large in high-temperature testing, it is important to use an apparatus with high machine stiffness. The furnace that surrounds the specimen is usually of resistance, radiant-heating, or...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
.... However, image contrast at an interface between a specimen and the electroless nickel may be inadequate for certain evaluations. For example, Fig. 3(a) and (d) show the surface of a specimen of 1215 free-machining steel that was salt bath nitrided. One specimen was plated with electroless nickel; both...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... =0.8 and ε ˙ =0.01 s −1 . Source: Ref 6 Another way to deal with barreling in the compression test is to physically remove it by machining at intervals of strain. Fig. 5 shows the true compressive stress-strain curve for a 4140 alloy steel specimen. The specimen was compressed about...