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Vickers hardness testing

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720085
EISBN: 978-1-62708-305-8
... Abstract This chapter discusses the operating mechanism, applications, advantages, and limitations of Brinell hardness testing, Rockwell hardness testing, Vickers hardness testing, Scleroscope hardness testing, and microhardness testing. In addition, the general precautions and selection...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
... hardness with tensile strength. Source: Ref 3 The most common types of hardness tests are indentation methods. These tests use a variety of indentation loads ranging from 1 gf (microindentation) to 3000 kgf (Brinell). Low and high powered microscopes (Brinell, Vickers, and microindentation) are...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... coarse microstructure. The Brinell hardness test is unsuitable for use at high hardness levels (above 600 HB), because distortion of the ball indenter can affect the shape of the indentation. Either the Rockwell or the Vickers (136° diamond pyramid) hardness test is used for alloys of extreme...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440027
EISBN: 978-1-62708-262-4
... commonly used hardness testing systems: the Brinell, Rockwell, Vickers, Scleroscope, and various microhardness testers that employ Vickers or Knoop indenters. The effect of carbon content on annealed steels and hardened steels is then discussed. A brief discussion on the concept of the ideal critical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850334
EISBN: 978-1-62708-260-0
... Abstract Hardness tests provide valuable information about the quality of materials and how they are likely to perform in different types of service. This chapter covers some of the most widely used hardness testing methods, including Vickers, Rockwell, and Brinell tests, Shore scleroscope and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130529
EISBN: 978-1-62708-284-6
...). Conversely, identical indentation diameters for both types of ball will correspond to different Vickers and Rockwell values. Thus, if indentation in two different specimens both are 2.75 mm diameter (495 HB), the specimen tested with a standard ball has a Vickers hardness of 539, whereas the specimen tested...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060465
EISBN: 978-1-62708-261-7
... materials. The most reliable hardness-conversion data exist for steel that is harder than 240 HB. The indentation hardness of soft metals depends on the strain-hardening behavior of the material during the test, which in turn depends on the previous degree of strain hardening of the material before the test...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
... Abstract This chapter explains how metallography and hardness testing are used to evaluate the quality and condition of metal products. It also discusses the use of tensile testing, fracture toughness and impact testing, fatigue testing, and nondestructive test methods including ultrasonic, x...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480113
EISBN: 978-1-62708-318-8
... large indentation represents a low hardness. There are a number of hardness testing methods; the most often used is the Vickers method (providing a Vickers hardness number, or VHN), which has a wide range of applications. Titanium alloys in general exhibit a much higher hardness than aluminum alloys...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140039
EISBN: 978-1-62708-264-8
...; Rockwell, Brinell, Vickers, and Knoop hardness tests; and Charpy V-notch impact tests. The chapter also provides information on loading conditions that can lead to fatigue failure, and in some cases, counteract or prevent it. fatigue failure hardness test mechanical properties notched impact test...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290193
EISBN: 978-1-62708-319-5
... load, and measurement—depth, width, or length of the indent. Unlike destructive strength tests, hardness indents are small and hardly noticeable. Hardness scales include Rockwell, Knoop, Vickers, and Brinell. Conversion tables allow approximate comparisons between the scales. In the Brinell test, a...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050245
EISBN: 978-1-62708-311-9
... specifications for case depths do not require microhardness. When microhardness is required, the Vickers indent is recommended. This makes testing of the HRC 50 equivalent easier in the relatively large hardness transition zones produced during induction hardening. With the Vickers test, polishing to 600 grit...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240201
EISBN: 978-1-62708-251-8
... by the penetrator. The Brinell hardness tester is another widely used test for large steel parts, such as crankshafts, where a minimum of depth of penetration is needed. Microhardness tests (Vickers and Knoop) can be made on individual constituents of a microstructure, and it is possible to determine...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500317
EISBN: 978-1-62708-317-1
.... , Tool Steels , ASM International , 1998 16.27 “Standard Test Methods for Rockwell Hardness of Metallic Materials,” E 18 , ASTM International , 2008 16.28 “Standard Test Method for Knoop and Vickers Hardness of Materials,” E 384 , ASTM International , 2010 16.29 Qvarnström...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
... pathways, and relevant test and measurement procedures. It describes life assessment methods based on hardness, wall thickness, scale formation, microstructure, and creep. It also includes a case study on the determination of the residual life of a secondary superheater tube. boiler tubes remaining...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030089
EISBN: 978-1-62708-282-2
... in the HAZ are not overlooked in weld procedure qualification, many standards now require the use of the Vickers hardness testing for welds, using 5 or 10 kg (e.g., ASTM E92) loads, because the larger indenter used for Rockwell C measurements (often stipulated for parent material) will not identify...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400149
EISBN: 978-1-62708-258-7
... • Lozinskii M.G. , High Temperature Metallography , Pergamon Press , 1961 Hardness Testing • Boyer H.E. , Ed., Hardness Testing , ASM International , 1987 Many metallographic laboratories have an image analyzer as part of the observation/photographic facilities. As the name...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090221
EISBN: 978-1-62708-266-2
... . The SCC tests were performed on U-bend specimens machined from cold rolled (half-hard) brass sheet stock. Specimens were exposed in stoppered flasks under freely corroding conditions. Within the flasks was a small air space above the test solutions. Time to failure as a function of pH is shown in Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
... that are four pitch and coarser. Use hot oil quenching on fine pitch gears. Case hardness of the finished gear should be 60 HRC or greater. If possible, test each gear for partial decarburization and/or upper transformation products. To minimize distortion and to permit quieter operation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430107
EISBN: 978-1-62708-253-2
... ). During Vickers hardness testing of a sample, measurement of diagonal lengths of the impression using microscope eyepiece rulers becomes difficult, particularly when indentation is made at lower loads of 10 to 200 g. Image analysis software can be used to measure the microhardness of a sample, provided a...