National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Using the contact profilometer to measure the dimensional changes of metal samples after laser treatment
Hiklová, Helena ; Chmelíčková, Hana ; Havelková, Martina ; Řiháková, Lenka
The paper presents several specific examples of the use of contact profilometer Taylor Hobson. It is used here for mapping of the metal surface samples after laser hardening and remelting. There is a change in the volume of the sample after laser material processing. The contact profilometer seems to be the best choice for measuring of modification of volume and dimensions.
Application of acoustic emisssion for thin layer mechanical toughness evaluation
Boháč, Petr ; Tomáštík, Jan ; Koula, V. ; Dráb, M. ; Jastrabík, Lubomír
The thin films are used as a functional coating of components. The limiting factor of their application is the adhesion to substrate. The laboratory method to investigation of their adhesion and mechanical toughness is the scratch test. This method emulates a mechanism of the abrasive wear in a way. Evaluation of the test results is mainly performed by microscopic investigation of deformations and micro cracks in the scratch track. Irreversible deformations, which arise during scratch test generate an acoustic emission (AE). By simultaneous scanning and recording of the increasing depth of penetration with increasing load of the stylus in the nanotester and by this way generated AE (recorded by analyzer)one can obtain data files, which contain a course of the whole experiment including AE.

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