Abstract
ultrasonic hardness tests, steel. The “Sonodur” hardness tester operates on a completely different principle, which makes it very useful for certain conditions. A magnetostrictive, diamond-tipped rod, vibrating at ultrasonic frequencies, is brought into contact with the metal at a load of 11/2 lb (6.7 N). Tip penetration, which is related to hardness of the material, changes the vibration frequency of the rod. This change in frequency is read on a meter scale in terms of either Rockwell or Vickers numbers. The equipment is portable, and the shallowness of the indentation, less than 0.0005 in. (0.013 mm), makes it particularly suitable for use where a larger indentation would be objectionable. Its use is restricted primarily to steel. (See also hardness testing.)
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Rights and permissions
Copyright information
© 1984 Chapman and Hall
About this chapter
Cite this chapter
Tver, D.F., Bolz, R.W. (1984). U. In: Encyclopedic Dictionary of Industrial Technology. Chapman and Hall Advanced Industrial Technology Series. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-9674-5_21
Download citation
DOI: https://doi.org/10.1007/978-1-4615-9674-5_21
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4615-9676-9
Online ISBN: 978-1-4615-9674-5
eBook Packages: Springer Book Archive