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Vickers hardness

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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004043
EISBN: 978-1-62708-185-6
... − HRB ) (60–90 HRB, 110–192 HB) Stable alpha-beta titanium alloys HRC=0.078 HV+8.1 Table 2 Approximate Rockwell B hardness conversion numbers for nonaustenitic steels Rockwell Superficial Rockwell Vickers Knoop, 500 gf and over Brinell, 3000 kgf, 10 mm ball Tensile...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004044
EISBN: 978-1-62708-185-6
... Approximate equivalent hardness numbers for wrought aluminum products Brinell hardness No., 500 kgf, 10 mm ball, HBS Vickers hardness No., 15 kgf, HV Rock well hardness No. Rockwell superficial hardness No. B scale, 100 kgf, 1 16 in. ball, HRB E scale, 100 kgf, 1 8 in. ball...
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
... distorts the base metal and is influenced by it, which usually results in low hardness readings. The most reliable and most widely accepted hardness values are those obtained with the Vickers 136 diamond pyramid indenter or the Knoop indenter. With these, the hardness test must be made on a carefully...
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 Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003152
EISBN: 978-1-62708-199-3
... with values ranging from 83.0 HRA for high-cobalt coarse-grain grades to 93.0 HRA for low-cobalt fine-grain grades. Vickers diamond pyramid hardness (HV) is widely used in Europe; values range from 800 to 2000 kg/mm 2 using a 30 kg load. The precision and accuracy of hardness testing is influenced...
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
... pyramid ( Fig. 8 ) geometry that would produce hardness numbers nearly identical to Brinell numbers within the range of both. This decision was very wise, as it made the Vickers test very easy to adopt. Fig. 8 Schematic representation of the square-base pyramidal diamond indenter used in a Vickers...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003201
EISBN: 978-1-62708-199-3
... a decrease in hardness, the magnitude of which depends upon alloy content, initial hardness, and time. Figure 4 shows the change in the Vickers hardness of two quenched ductile iron alloys with tempering temperature and time. Fig. 4 Vickers hardness (10 kg load) versus tempering time at...
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...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003082
EISBN: 978-1-62708-199-3
... (Rockwell C hardness range) For carbon and alloy steels in the annealed, normalized, and quenched-and-tempered conditions. Rockwell C hardness No., 150 kgf, HRC Vickers hardness No., HV Brinell hardness No. Knoop hardness No., 500 gf and over, HK Rockwell hardness No. Rockwell superficial...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006273
EISBN: 978-1-62708-169-6
... by high hardness. On cross sections of a sufficiently thick layer, a plastic universal hardness of HU plas0.05 = 16 GPa (2320 ksi) is measured. As a first approximation, this corresponds to a Vickers hardness of 1600 HV 0.005 . Fig. 5 X-ray diffraction pattern of various nitrided alloys...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005324
EISBN: 978-1-62708-187-0
... hardness can be an unreliable criterion for accurate prediction of fatigue strength. The rotary-bending fatigue limit increases with matrix microhardness up to approximately 500 HV (Vickers hardness) but decreases with higher hardness matrices ( Fig. 19 ). Fig. 18 Brinell hardness versus fatigue...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005675
EISBN: 978-1-62708-198-6
... 3.94 Average grain size, µm 3–6 <7 ≤ 4.5 (b) Surface roughness ( R a ), µm 0.02 … … Vickers hardness 2300 >2000 18 GPa (2.5×10 6 psi) Compressive strength, MPa (ksi) 4500 (650) … 4000 (580) Bending strength, MPa (ksi) 550 (80) (c) 400 (58) (c) 400 (58...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006254
EISBN: 978-1-62708-169-6
... hardness to yield strength is useful. Different relationships for hardness (Vickers hardness, or HV) and yield strength (YS; in MPa, or ksi) are applicable to HPDC and gravity-cast alloys. According to Ref 2 , the relationships can be approximated by: Gravity-cast   magnesium-aluminum :   YS...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006649
EISBN: 978-1-62708-213-6
... releases the stresses and minimizes the carbon and oxygen content, so that the iron powder softens. To measure particle hardness, indentation hardness tests, such as the Vickers microhardness (MHV) test, can be used. Under an optical measurement system, a pyramidal-pointed diamond is impressed into the...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003061
EISBN: 978-1-62708-200-6
... parameters affecting wear of ceramics, namely, hardness, thermal conductivity, fracture toughness, and corrosion resistance. The next part of the article addresses temperature-resistant applications of advanced ceramics. Specific applications of ceramic materials addressed include cutting tools, pump and...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
.... The article describes testing methods such as room and high-temperature strength test methods, proof testing, fracture toughness measurement, and hardness and wear testing. It also explains methods for determining thermal expansion, thermal conductivity, heat capacity, and emissivity of ceramics and...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003197
EISBN: 978-1-62708-199-3
... produce small, shallow impressions should be used for both of the following procedures, so that the hardness values obtained will be representative of the surface or area being tested. Testers that produce Vickers or Knoop microhardness numbers with loads of at least 0.2 to 1.0 kg are recommended...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0005697
EISBN: 978-1-62708-181-8
... rate of change); depth; diameter fractal dimension da/dN fatigue crack growth rate DBTT ductile-brittle transition temperature dc direct current diam diameter DIC differential interference contrast dm decimeter DPH diamond pyramid hardness (Vickers...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0005586
EISBN: 978-1-62708-170-2
... DIBS dual-ion-beam sputtering DIN Deutsche Industrie-Normen (German Industrial Standards) DLC diamondlike carbon dL / dX loading rate dpa displacements per incident atom DPH diamond pyramid hardness (Vickers hardness) e natural log base, 2.71828; charge of an...
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