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indentation
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Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003302
EISBN: 978-1-62708-176-4
... Abstract This article describes a method for determining the dynamic indentation response of metals and ceramics. This method, based on split Hopkinson pressure bar testing, can determine rate-dependent characteristics of metals and ceramics at moderate strain rates. For example, dynamic...
Abstract
This article describes a method for determining the dynamic indentation response of metals and ceramics. This method, based on split Hopkinson pressure bar testing, can determine rate-dependent characteristics of metals and ceramics at moderate strain rates. For example, dynamic indentation testing reveals a significant effect of loading rates on the hardness and the induced plastic zone size in metals and on the hardness and induced crack sizes of brittle materials. The article also explains the rebound and pendulum methods for dynamic hardness testing.
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003273
EISBN: 978-1-62708-176-4
... Abstract This article provides a practical reference guide for instrumented indentation testing (IIT). It summarizes the various types of indenters used in IIT and parameters describing their geometries. The article discusses the physical principles and models used to determine hardness...
Abstract
This article provides a practical reference guide for instrumented indentation testing (IIT). It summarizes the various types of indenters used in IIT and parameters describing their geometries. The article discusses the physical principles and models used to determine hardness and elastic modulus from indentation load displacement data. Indentation deformation can be time-dependent, with the extent and nature of the time dependence strongly influenced by temperature. The article examines the methods for probing and characterizing the time-dependent phenomena. It also emphasizes the better-developed measurement techniques and procedures and calibrations required to obtain accurate and meaningful measurements.
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003274
EISBN: 978-1-62708-176-4
... Abstract Hardness characterizes the resistance of the ceramic to deformation, densification, displacement, and fracture. It is usually measured with conventional microindentation hardness machines using the Knoop or the Vickers diamond indenters. This article discusses the metrology issues...
Abstract
Hardness characterizes the resistance of the ceramic to deformation, densification, displacement, and fracture. It is usually measured with conventional microindentation hardness machines using the Knoop or the Vickers diamond indenters. This article discusses the metrology issues of the Knoop and the Vickers hardness in ceramics. It explicates how to estimate fracture toughness from Vickers indentation cracking. The article also provides information on instrumented hardness testing and the Meyer law.
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Published: 31 October 2011
Fig. 16 Lap joining by small tool indentation. (a) Double-sided indentation. (b) Single-sided indentation. Source: Ref 16
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Published: 01 January 2002
Fig. 19 Vickers indentation origin in a glass plate. The indentation is seen in cross section at the center of the image. Two radial cracks together form a semicircular region, a so-called half-penny crack, that became the fracture origin. Optical microscope; transmitted light; picture width
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Published: 01 January 1986
Fig. 9 Berg-Barrett topographs of a Vickers hardness indentation on MgO cleavage surface. (a) (022) reflection. (b) (202) reflection. Both 45×. Source: Ref 17
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Published: 01 January 1994
Fig. 5 Stress-strain curve for an annealed gold film, obtained by the indentation technique using a spherical-tipped diamond indenter of 20 μm radius. Source: Ref 13
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Published: 01 August 2013
Fig. 6 Comparison of Knoop indentation using the same load in both the hardened case and soft core of a workpiece
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Published: 01 August 2013
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Published: 01 January 1990
Fig. 9 Hot hardness (mutual indentation Brinell) of high-speed steel as a function of the temperature of testing. Average results of a series of tests on T1 tool steel. Ref 6
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Published: 01 January 2005
Fig. 24 Slip-line field for double indentation at different h / b ratios. Source: Ref 26
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Published: 01 January 2005
Fig. 55 Partial-width indentation test. L ≈ h ; b = h /2; w a =2 L ; l =4 L
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Published: 01 January 2005
Fig. 20 Slip-line fields for double indentation at different h/b ratios. Source: Ref 11
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Published: 01 January 2005
Fig. 22 Variation of the normalized indentation pressure ( P/Y where Y is the yield strength) and the normalized centerline hydrostatic stress (σ h / Y ) with h/b ratio as calculated from slip-line field analysis
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Published: 01 January 2005
Fig. 29 Relationship between crack width and stroke in truncated-cone indentation test for workability of various steels at cold forging temperatures. Source: Ref 58
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Published: 01 January 2005
Fig. 25 Excessive indentation by the mandrel, causing the main roll to slip and the ring to stall in the radial pass
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Published: 01 December 2008
Fig. 10 Indentation profiles of three types of hardness testing methods
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Published: 01 January 2006
Fig. 1 Shearing deformation during hole punching (a); initial indentation by the punch is followed by intense shearing between the punch and die and then fracture for final separation. These stages are manifest in the appearance and surface finish of the hole (b). Source: Ref 1
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Published: 01 January 2000
Fig. 9 Plan view of Vicker's indentation showing (a) barrel-shaped pattern, and (b) pin cushion-shaped pattern
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Published: 01 December 1998
Fig. 5 Indentation in a workpiece made by application of (a) the minor load, and (b) the major load, on a diamond Brale indenter in Rockwell hardness testing. The hardness value is based on the difference in depths of indentation produced by the minor and major loads.
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