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Related to Hardness tests: Rockwell hardness test


1. The degree of firmness of a solid, as determined by its resistance to deformation, scratching, or abrasion.
See also: hardness scale, number.
2. The relative penetrating power of a beam of x-rays, used both within the diagnostic range of energy and in radiation therapy; expressed in terms of half-value layer.
Farlex Partner Medical Dictionary © Farlex 2012


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.
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about hardness

Q. Why is it so hard???? Why is it so hard to quit drinking ? i try and i try and it seems like i can't find the strength to stop completely .. every time i am almost there .. but than i just snap!

A. HI....find out about alcoholics anonymous in your town,call their 800#...go to(INTHEROOMS.com)find HELP.......mrfoot56

Q. i cant stop getting a hard on erection stiffy embarrassing crease in trousers

A. Have you heard of priapism,a condition in which the penis is continually erect; usually painful and seldom with sexual arousal. If you suffer from this you should go see a doctor about it.

Q. anyone knows how to stop hard skin on the feet from becoming cracked??? during summer my feet got lots of hard skin and in the heel area the skin actually got cracked kinda deep. it hurts now and the cracks are starting to get infected I guess... do u guys know how to solve this?? I know there are some creams for that but I thought maybe now it's too late for that and I need something stronger?

A. There are good creams for moisterizing the skin of your feet on a daily basis, however now that you feel they might be infected you should see a dermatologist for some better treatment.

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References in periodicals archive ?
The indent made by the hardness test can either be ground out, or can be so small as to not affect the performance of the component.
The difference in these hardness results was due to the difference in indentor geometry for these hardness tests. In addition, the hardness measurements are dependent on the viscoelastic behavior of the material; there is no simple conversion of the results obtained with testers of different ranges or by different methods.
In the KNOOP hardness test the modeled shape is an elongated diamond as a result of the indention.
Pencil hardness is a very common hardness test for organic coatings (ASTM D 3363).
For a long time, an indentation test, usually referred to as a hardness test, has been the most convenient method for assuring the quality of the mechanical properties of engineering materials.
Internal hardness tests are made in the hub bore with the hub still in the fixture.
Tobolski, Miscellaneous Hardness Tests, in Mechanical Testing and Evaluation, ASM Handbook, Volume 8, H.
The universal hardness tester in question renders possible both hardness tests of static stress and impact ones using unique equipment, different types of hardness tests requiring only the penetrator and computer proper setting.
For example, in the molding area, machine operators obtain information through scratch hardness tests and mold wash thickness measurements.
The Multi-Scale durometer test kit is designed for the technician who must perform hardness tests on various types of non-metallic materials.
Hardness testing of the welds was carried out based on the Vickers hardness test. The Vickers hardness test method involves indenting the test material with a diamond indenter in the form of a right pyramid with a square base and an angle of 136 degrees between opposite faces (Fig.