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microhardness testing

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Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005798
EISBN: 978-1-62708-165-8
... Abstract This article presents the different hardness test methods used to measure the effectiveness of surface carbon control in carburized parts of steel. Common test methods include Rockwell hardness measurements, superficial Rockwell 15N testing, and microhardness testing. The article...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005795
EISBN: 978-1-62708-165-8
... methods of measuring case depth in steels, including chemical methods such as the combustion analysis and spectrographic analysis, microhardness test method, macroscopic and microscopic visual methods, and nondestructive methods. It contains a table that provides approximate equivalent hardness numbers...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005605
EISBN: 978-1-62708-174-0
.... These methods include peel testing, push-pin testing, and microhardness/nanohardness testing. The article also reviews the issues to be addressed in maintaining UAM fabrication quality. fabrication quality machining mechanical properties metal tape metallurgical properties microhardness testing...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005863
EISBN: 978-1-62708-167-2
... hardness. The traditional method for checking or verifying induction-hardened parts is destructive sectioning, where metallurgical samples are taken from the part at various locations to evaluate case depth through microhardness testing and optical examination of microstructure ( Ref 44 ). The various...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003275
EISBN: 978-1-62708-176-4
... of microconstituents, but it does not lend itself to high reproducibility or extreme accuracy. For more information, see the article “Scratch Testing” in this Volume. Ultrasonic microhardness testing offers an alternative to the more conventional methods based on visual (microscopic) evaluation...
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
.... Analysis of a finished surface can provide a statistical analysis of the machining process and identify any significant changes in the material microstructure. Microhardness testing is a useful tool for the microstructural analysis of a finished surface. Information such as phase identification...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001343
EISBN: 978-1-62708-173-3
... in this characterization were macrostructural examination, compositional mapping, x-ray diffraction, tension testing of all weld metal specimens, and microhardness traverses. In addition to the previous mechanical tests, microhardness testing is often used for this type of weld. The primary purpose of microhardness...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003276
EISBN: 978-1-62708-176-4
... Hardness of Powder Metallurgy Products,” MPIF 43 (1995), Standard Test Methods for Metal Powders and Powder Metallurgy Products , Metal Powder Industries Federation , 1999 5. “Determination of Microhardness of Powder Metallurgy Materials,” MPIF 51 (1994), Standard Test Methods for Metal Powders...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005730
EISBN: 978-1-62708-171-9
... applicable for thermal spray coatings is provided in Table 1 . Table 1 ASTM International tests applicable for thermal spray coatings ASTM test number Description E633 Tensile adhesion G76 Erosion G65 Abrasion E18 Superficial hardness E384 Microhardness E1920...
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
... helps the failure analyst gain an understanding of how the component or system responded to the applied forces. Also, because some mechanical properties can be correlated, tests such as hardness and microhardness of steels can be used to gain an understanding of tensile strength, especially when...
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
... (a) (a) (a) (a) (a) (a) (a) (a) 20 (a) 20 22 These values are approximate only and are intended primarily as a guide: see test for example of use. Materials thinner than shown may be tested on a Tukon microhardness tester. The thickness of the workpiece should be at least 1 1 2 times the diagonal...
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
... be tested on a Tukon microhardness tester. The thickness of the workpiece should be at least 1 1 2 times the diagonal of the indentation when using a Vickers indenter, and at least 1 2 times the long diagonal when using a Knoop indenter. (a) No minimum hardness for metal of equal...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0009000
EISBN: 978-1-62708-186-3
... scanner ( Fig. 4 ) Measurement of initial and final microhardness of draw bead surfaces using a microhardness tester Figure 2 illustrates the sheet metal samples after drawing in the wear tests, where the sheet metal is HD-GA dual-phase (DP) 500 (DP500) without any stamping lubricant. Figure 3...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005628
EISBN: 978-1-62708-174-0
... is for microhardness testing. The hardness value is usually measured along a diagonal direction across the base metal, the HAZ, and the nugget, with a constant spacing. In Fig. 27 ( Ref 23 ), the indents, shown as dots in the figure, are the marks left from microhardness testing on a transverse cross section...
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
..., it is important that the test be conducted on material below any surface decarburization. Microhardness testing may be appropriate when localized heat treatments, such as carburizing or induction hardening, have been ted on the failed casting. Knoop or Vickers microhardness tests can be conducted...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001368
EISBN: 978-1-62708-173-3
... (crush test), reverse flattening test, and the flare test. Metallographic examination and microhardness testing can also be used to determine weld quality and the character of the adjacent heat-affected zone. ...
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
.... Bur. Std. , Vol 23 , July 1939 , p 39 – 61 10.6028/jres.023.022 14. Peters C.G. and Knoop F. , Resistance of Glass to Indentation , Glass Ind. , Vol 20 , May 1939 , p 174 – 176 15. “Standard Test Method for Microhardness of Materials,” E 384-89 (1997)e2, Annual...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003270
EISBN: 978-1-62708-176-4
..., independent of the indentation load (compare this with the case of the Brinell test where the requirement is that the d / D ratio should be constant to obtain identical hardness values). The preceding discussion is true for the commonly used microhardness and macrohardness tests with indentations above...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006347
EISBN: 978-1-62708-179-5
... of the matrix, converted from microhardness tests. O, oil quenched and tempered to 207 HB before surface hardening; A, air cooled and tempered to 207 HB before surface hardening The maximum hardness obtainable in the matrix of a properly hardened pearlitic malleable part is 67 HRC. However, conventional...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002119
EISBN: 978-1-62708-188-7
... to meet surface integrity requirements. Some inspection practices include the following: Microscopic examination, including microhardness testing, is used on a sampling basis to determine the type of surface layer being produced and its depth. This method can be used to check for such defects...