hardness (Meaning of)

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Hardness
Hardness is the measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied. Macroscopic hardness is generally characterized by strong intermolecular bonds, but the behavior of solid materials under force is complex; therefore, there are different mea...
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Hardness
the measure of some materials' resistance to deformation by surface indentation or by abrasion.
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hardness
[n] - the property of being rigid and resistant to pressure 2. [n] - the quality of being difficult to do
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Hardness
A measure of a crystal or mineral to scratching or abrasion. (See Moh's Scale)
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Hardness
approximates to the concentration of calcium and magnesium salts in water. Total hardness is the sum of carbonates and non-carbonate hardness. It may be expressed as degrees of hardness, millimoles per litre (expressed as calcium Equivalent), or as parts per million of CaCO3 equivalent.
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Hardness
Measure of a material's resistance to localized Plastic Deformation. Most hardness tests involve indentation, but hardness may be reported as resistance to scratching (file test), or rebound of a projectile bounced off the material (scleroscope hardness). Some common measures of indentation hardness...
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Hardness
Resistance of metal to plastic deformation usually by indentation. However, the term may also refer to stiffness or temper, or to resistance to scratching, abrasion, or cutting.Indentation hardness may be measured by various hardness tests, such as Brinnell, Rockwell, and Vickers.Many ceramics, and ...
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hardness
Hardness is the resistance of a material to deformation of an indenter of specific size and shape under known load. This definition applies to all types of hardness scales except Mohs scale, which is a based on the concept of scratch hardness and is used chiefly for minerals. The most generally used...
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Hardness
a characteristic of water, imparted by salts of calcium, magnesium, and iron, such as bicarbonates, carbonates, sulfates, chlorides, and nitrates that cause curdling of soap, deposition of scale in boilers, damage in some industrial process, and sometimes
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Hardness
the measure of some materials resistance to deformation by surface indentation or by abrasion.
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Hardness
Degree of hardness. Shore and Rockwell being two scales used to measure and compare hardness.
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Hardness
Hard'ness noun [ Anglo-Saxon heardness .] 1. The quality or state of being hard, literally or figuratively. « The habit of authority also had given his manners some peremptory hardness .» Sir W. Scott. 2.
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hardness
<chemistry> Total concentration of calcium and magnesium ions, expressed as the equivalent concentration (mg/L) of calcium carbonate. ... Hard water is water that contains lots of calcium carbonate and other minerals. ... (09 Oct 1997) ...
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Hardness
• (n.) The peculiar quality exhibited by water which has mineral salts dissolved in it. Such water forms an insoluble compound with soap, and is hence unfit for washing purposes. • (n.) The quality or state of being hard, literally or figuratively. • (n.) The cohesion of the particles...
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hardness
(from the article `radiation`) 4. Hardness and ductility depend on perfection of the crystal structure. It is thus found that irradiation results in a loss of ductility and an ... The hardness of a metal can be measured in several ways. If a hard indenter (a sphere, cone, or pyramid) is pushed a sho...
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Hardness
Resistance to plastic deformation by indentation, penetration, scratching or bending.
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Hardness
The property of metals and their alloys relating to strength, elasticity, and toughness and defined as the measurement of its resistance to indentation. Through-hardened parts are typically measured by the Rb, Rc or Brinell scales. Case-hardened parts usually have a hardness specified to a specifi...
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Hardness
Is a measure of the resistance of a material to scratching and indention.
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hardness
A property of wood that enables it to resist indentation. It is measure in kN and is often determined by the Janka hardness test
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Hardness
the resistance of a substance to surface abrasion.
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Hardness
The hardness of a material can be measured by its resistance to scratching or to indentation. Mostly used hardness tests involve the determination of the material resistance to indentation under standardized conditions. A hard indenter of standard shape is pressed into the surface of the material un...
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hardness
hardness, property of matter commonly described as the resistance of a substance to being scratched by another substance. The degree of hardness is relative, different substances being compared with one another. Mohs's scale of hardness (named for Friedrich Mohs), used commonly in mineralogy, lists ...
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Hardness
Hardness refers to the resistance of a smooth surface of a rock or mineral to scratching. It is determined by the binding force of atoms within the crystal structure and is measured according to Moh's ten division scale of hardness, ranging from 1 the softest, to 10 the hardest: 1) talc 2) gypsum 3)...
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hardness
Type: Term Pronunciation: hard′nes Definitions: 1. The degree of firmness of a solid, as determined by its resistance to deformation, scratching, or abrasion. 2. The relative penetrating power of a beam of x-rays, used both within the diagnostic range of energy and in radiation therapy; expres...
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hardness
The resistance of a material to indentation by various means, such as scratching, abrasion, wear, and drilling. Methods of heat treatment can increase the hardness of metals. A scale of hardness was devised by German–Austrian mineralogist Friedrich Mohs in the 1800s, based upon the hardness of cer...
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