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Indentation hardness print that page

When testing metals, indentation hardness correlates linearly with tensile strength. This important relation permits economically important nondestructive testing of bulk metal deliveries with lightweight, even portable equipment, such as hand-held Rockwell hardness testers. [ 1 ] Contents

wikipedia.org | 2011/2/14 15:20:40

Hardness print that page


superhard materials , which can be contrasted with soft matter . Contents 1 Measuring hardness 1.1 Scratch hardness 1.2 Indentation hardness 1.3 Rebound hardness 2 Hardening 3 Physics 3.1 Mechanisms and theory 4 See also 4.1 Other strengthening mechanisms

Ballistic vest print that page


materials for stab armor testing 6 Rifle resistant armor 6.1 Armor Piercing Ammunition Core Hardness and Protection 7 Explosive protection 8 Stab armor and combination stab-ballistic armor 8.1 Early “Ice Pick” test 8.2 Knife standards developed by HOSDB-Stab and Slash

Janka hardness test print that page


The Janka hardness test measures the resistance of a type of wood to withstand denting and wear. It measures the force required to embed an 11.28 mm (0.444 in) steel ball into wood to half the ball's diameter. This method leaves an indentation . A common use of Janka hardness ratings

Drill bit print that page


The shank is the part of the drill bit grasped by the chuck of a drill . The cutting edges of the drill bit are at one end, and the shank is at the other. Drill bits come in standard sizes, described in the drill bit sizes article. A comprehensive drill bit and tap size chart lists metric

Rockwell scale print that page


The Rockwell scale is a hardness scale based on the indentation hardness of a material. The Rockwell test determines the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetration made by a preload. [ 1 ] There are different scales,

Vickers hardness test print that page

The Vickers hardness test was developed in 1924 by Smith and Sandland at Vickers Ltd as an alternative to the Brinell method to measure the hardness of materials. [ 1 ] The Vickers test is often easier to use than other hardness tests since the required calculations are independent

wikipedia.org | 2011/3/7 12:00:04

Leeb rebound hardness test print that page


The Leeb rebound hardness test is one of the four most used method for testing metal hardness . This portable method is mainly used for testing sufficiently large workpieces (mainly above 1 kg). [ citation needed ] Contents 1 History 2 Method 3 Scales 4 Standards 5 See

Brinell scale print that page

The Brinell scale characterizes the indentation hardness of materials through the scale of penetration of an indenter, loaded on a material test-piece. It is one of several definitions of hardness in materials science . Proposed by Swedish engineer Johan August Brinell in 1900, it

wikipedia.org | 2011/5/14 8:19:45

Meyer hardness test print that page

The Meyer hardness test is a rarely used hardness test based upon projected area of an impression. This is a more fundamental measurement of hardness than other hardness tests which are based on the surface area of an indentation . The principle behind the test is that the mean pressure

wikipedia.org | 2010/9/25 2:24:18