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Vickers indentation cracking

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Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001297
EISBN: 978-1-62708-170-2
... many aspects the well-known hardness measuring techniques, such as the Vickers and Brinell hardness tests. However, in the “nanoindentation” technique, the indentations extend only to extremely shallow depths, often as low as nanometers. A hard indenter, usually an accurately ground diamond, is...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... process, and the indenting abrasive causes localized fracture of the wear material. These cracks then freely propagate locally around the wear groove, resulting in additional material removal by spalling. Fig. 4 Microscopic mechanisms of material removal between abrasive particles and the surface...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... Abstract Fatigue failures may occur in components subjected to fluctuating (time-dependent) loading as a result of progressive localized permanent damage described by the stages of crack initiation, cyclic crack propagation, and subsequent final fracture after a given number of load...
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
... Type Indentation: standard operation Vickers Macroindentation or microindentation Rockwell Macroindentation Brinell Macroindentation Indentation: nonstandard operation Rockwell Low-load Vickers Low-load Brinell Calibrated pin system (static or dynamic...
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
... 3 mm (0.12 in.) apart with a carbide-tipped height gage. Four gage points are indented at midheight of the cylindrical specimen with a Vickers or diamond brale hardness indenter. Fig. 3 Grids for strain measurements on upset cylinders Scribed lines or hardness indentations should...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001243
EISBN: 978-1-62708-170-2
... loads are more sensitive to hardness variations and result in higher hardness values. Cracks influence values obtained with heavy loads more than values obtained with light loads. Also, because of the smaller area covered by the Vickers 136 diamond pyramid indenter, hardness values determined with this...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006252
EISBN: 978-1-62708-169-6
... stress, with harder, more highly alloyed compositions displaying higher residual stresses. The indentation hardness was measured immediately after cold water quenching (using a very rapid dynamic Vickers hardness technique) to eliminate the influence of natural aging. The blocks were quenched from the...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001320
EISBN: 978-1-62708-170-2
..., i Σ l i , in a P vs. i Σ l i plot obtained in indentation tests. Source: Ref 44 Table 2 Typical properties of cermets Composition Vickers hardness, kg/mm 2 Modulus of rupture, MPa Fracture toughness K Ic , MPa m Young's modulus, GPa (Ti,Mo/W...
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...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... features apparent to the eye directly or by using low-power magnification. Of interest are scores, scuffing, dents, distortions, evidence of plastic deformation, cracks, and fractures. For example, documentation of damage and cracking surrounding a fracture, including damage patterns and crack origins, is...
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: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001237
EISBN: 978-1-62708-170-2
... fracture toughness data can be determined. Hardness is defined as the resistance to penetration by an indenter, and the Knoop and Vickers measurements are the most common. A Knoop hardness number (HK) is obtained by: HK = P / A p = 14.229   P / d 2 where P is the load...
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 Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.9781627081610
EISBN: 978-1-62708-161-0
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.9781627081719
EISBN: 978-1-62708-171-9
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003063
EISBN: 978-1-62708-200-6
... matrices can result in a tough ceramic material, because energy-dissipating phenomena are introduced, such as debonding at the fiber-matrix interface, crack deflection, fiber bridging, and fiber pullout. These toughening mechanisms can lead to damage-tolerant behavior, as shown in Fig. 1 . Fig. 1...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0006515
EISBN: 978-1-62708-200-6
... ICP inductively coupled plasma ID inside diameter IF indentation crack length/fracture IIR isobutylene-isoprene (butyl) rubber IM intermediate modulus in. inch IPTS International Practical Temperature Scale IR infrared (radiation); isoprene...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005343
EISBN: 978-1-62708-187-0
... Appearance of the fracture, if the casting is cracked or broken Determination of the fracture origin, the direction of crack propagation, and identification of the final fracture region Presence of nonmetallic inclusions, shrinkage, or gas porosity or any other anomalies at or near the fracture origin...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005966
EISBN: 978-1-62708-166-5
... content on the hardness of steel, in both Vickers hardness (HV) and Rockwell C scale hardness (HRC) for various microstructures. Figure 3 shows that the decarburized layer generally has a lower hardness than anticipated for a given steel with a given process history. This effect is especially pronounced...