Cannabaceae

In materials engineering and metallurgy, hot hardness[1] or red hardness[2] (when a metal glows a dull red from the heat) corresponds to hardness of a material at high temperatures. As the temperature of the material increases, hardness decreases and at some point a drastic change in hardness occurs. The hardness at this point is termed the hot or red hardness of that material. Such changes can be seen in materials such as heat treated alloys.[3]

References

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  1. ^ Schneider, G. Jr. "Chapter 1: Cutting Tool Materials". AmericanMachinist.com. Retrieved 2016-07-18.
  2. ^ "Red-Hardness". TheFreeDictionary.com. Retrieved 2016-07-18.
  3. ^ Shaffer, S. J. (3 March 2014). "Hardness Testing at Elevated Temperatures" (PDF). Bruker-TMT. Retrieved 2016-07-18.


One thought on “Cannabaceae

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

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