To study the effect of surface roughness on heat generation and plastic deformation of butted welded strips by friction stir welding we need to try different strips of different roughhouses deliberately created on the surface. CSM is an instrumentation used to measure the coefficient of friction of coatings and paints etc at nano scale. However, we think it is appropriate for surfaces of tens nanometers roughness only, to resort to the traditional method i.e to heat the samples to the required temperature and to let the shoulder start sliding against the sample under the proposed load is available option. But is there any other more accurate method? Is there any instrument available in Malaysia USM and UniMAP or somewhere else can measure that. Please advise.
We have several different tribological equipment to measure the coefficient of friction in a wide range of velocity, pressure (normal force) and temperature. I will add further information later. Is it possible to measure the torque needed during the stir welding process?
It seemed that you may use the machine for mechanical tests equipped by thermochaber and operating in regime of tribometer (such possibilities are presented, particularly, in Instron 5567 machine with thermochamber М55-16546 (until 350 C).
I am a bit confused with respect to the problem. If we study the dry friction process then the effect of roughness on friction has the meaning only for the beginning of the sliding. In what follows the rougness will change and be determined by adhesion wear and deformation. When measuring the friction on different roughness surfaces how can you determine the contribution of roughness only without the adhesion?
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