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microhardness

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Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006129
EISBN: 978-1-62708-175-7
... Table 1 Microhardness of carbides in high alloy tool steels Type of carbide Comment Microhardness HV or HK Reference Fe 3 C … 820 50 M 3 C Low Cr content 950 52 Higher Cr content <1230 52 800−1150 53 800−1200 49 Cr 23 C 6 … >1300 54 M 23...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005962
EISBN: 978-1-62708-168-9
... heat treatment, and isothermal aging in detail. It concludes with a review of the interrelationships between heat treatments, microstructures, and mechanical properties. alloying copper precipitation-strengthened steel heat treatment mechanical properties microhardness microstructure...
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...
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
... power for induction hardening, and describes common methods for measuring case depth, such as optical and microhardness, and surface hardness. It provides information on some complications and ambiguities associated with these measurements. The article also discusses the commonly used non-destructive...
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: 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...
Book Chapter

By J.Y. Shi
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005812
EISBN: 978-1-62708-165-8
... ( Fig. 2a ) results in finer and more evenly distributed carbides in the carburized layer than for Process B. The better microstructure from Process A results in higher hardness ( Fig. 4 ). Figure 5 illustrates the relationship between wear weight loss and wear time. The microhardness of a...
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
... of samples prone to abrasion damage and artifacts for quantitative image analysis. abrasion artifacts abrasion damage computer technology microhardness analysis microstructural analysis optical microscopy quantitative image analysis sample preparation surface analysis surface finishing...
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
... used. This is a useful tool for studying the relative hardness 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...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005800
EISBN: 978-1-62708-165-8
....) Q&P 980 Point Button size Tensile shear strength Cross-tension strength mm in. kN lbf kN lbf A 6.5 0.256 26.7 6002 12.3 2765 B 6.2 0.244 26.0 5845 11.9 2675 C 6.0 0.236 23.9 5373 11.4 2563 A weld cross-sectional micrograph and microhardness...
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
... Fig. 8 Hardness versus yield stress at 8% strain for metals under (a) static loading and (b) dynamic loading. The numbers next to the data points refer to metals and alloys listed in Fig. 6 . To estimate the differences in plastic zone size with respect to the loading rate, microhardness...
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: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0009000
EISBN: 978-1-62708-186-3
... forces and die wear as a function of drawing, and measurements of the initial and final microhardness of the draw bead surfaces. Details of the direct measurement techniques are described in this section. Indirect nondestructive measurement techniques for plant monitoring are presented with plant...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001254
EISBN: 978-1-62708-170-2
... contact resistant on a long-term basis ( Ref 8 , and 9 ). Smooth and bright deposits can be obtained from cyanide melts ( Ref 10 , 11 ). Microhardness of such layers is between 600 and 900 HK. Rhodium in its solid form is hard (microhardness about 800 to 1000 HV) and tough. It is nearly as tarnish...
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
... μm (0.12–0.4 μin.) 1–120 kgf Measure indent with low-power microscope; read hardness from tables Smooth clean surface, symmetrical if not flat Up to 180 Fine finished surfaces, thin specimens Small indent but high local stresses Microhardness 136° diamond indenter or a Knoop indenter 40 μm...
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
... obtained 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...
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
... high-resolution electron microscopy (microhardness) HRMF Rockwell microficial (microhardness) HSLA high-strength low-alloy HSS high-speed steel(s) HV Vickers hardness HVOF high-velocity oxyfuel (thermal-spray coating) Hz hertz I intensity; electrical current...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001239
EISBN: 978-1-62708-170-2
... concentrated contact between the abrasive and the workpiece is very similar to that occurring in a microhardness test. If we assume that the contact is a circular patch of radius a , the radius of contact can be obtained as: (Eq 7) a = N π H where N is the normal grinding force and H...
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 Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001258
EISBN: 978-1-62708-170-2
..., and magnetic properties. Ductility depends on iron content, brightener concentration, solution temperature, and pH. Deposit hardness varies with iron content. With iron content increasing from zero to about 10%, microhardness rises from 490 to 560 HK, then falls to around 510 HK with 49% Fe...