scholarly journals Wear of nickel-tungsten layer on carbon steel with varying contact surface temperature

Author(s):  
I M Widiyarta ◽  
I M Parwata ◽  
I P Lokantara
2021 ◽  
Vol 12 (1) ◽  
pp. 153
Author(s):  
I Made Widiyarta ◽  
I Made Parwata ◽  
I Putu Lokantara ◽  
Dwipayana Dwipayana

<span lang="PT-BR">The work presented in this paper is to investigate the wear rate and wear mechanism of medium carbon steel with carbon contents of about 0,5 wt.% under the friction load with various contact surface temperatures. The wear test was performed by using the linear reciprocating ball-on-flat wear test machine. To develop the elevated temperature on the surface of the wear test specimen, the heater assembled into the wear test machine. The surface temperature of the wear specimen was set in the range of 30 ºC up to 250 ºC. The test was taken under 5000 cycles of friction loading with a maximum of the normal load of 25N. The experiment results show that the change in the contact surface temperature in the range of 30 ºC up to 250 ºC causes the wear rate to increase slightly. This is because the elevated temperature at the surface was not high enough to cause the hardness of the material to decrease significantly. The worn surface looks very thin scratches and slightly deformed layers, and the wear mechanism had identified as oxide wear.</span>


Jurnal METTEK ◽  
2018 ◽  
Vol 4 (2) ◽  
pp. 43
Author(s):  
Dwi Payana ◽  
I Made Widiyarta ◽  
Made Sucipta

Beban gesek pada permukaan sebuah benda dapat menimbulkan panas pada permukaan kontak benda tersebut. Semakin besar beban gesek yang terjadi, suhu pada permukaan material akan menjadi lebih tinggi. Peningkatan suhu permukaan yang semakin tinggi dapat mempengaruhi sifat mekanis permukaan material dan tentunya dapat berimplikasi terhadap mekanisme kegagalan pada permukaan material tersebut, seperti kegagalan aus dan kegagalan retak. Pada penelitian ini, uji kekerasan dilakukan pada material dengan suhu permukaan tertentu. Permukaan material baja karbon sedang dipanaskan dengan variasi suhu yaitu mulai dari suhu kamar sampai dengan 300ºC, kemudian dilakukan uji Vicker’s. Tingkat kekerasan dan profil indentasi Vickers pada permukaan material dengan variasi suhu tersebut kemudian diinvestigasi. Friction load on the surface of an object can cause heat on the contact surface of the object. The larger the frictional load occurs, the temperature on the surface of the material will become higher. Increased surface temperatures can further affect the mechanical properties of the material surface and can certainly have implications for the failure mechanisms on the surface of the material, such as wear failure and crack failure. In this study, hardness tests were performed on materials with certain surface temperature. The surface of the carbon steel material is being heated with temperature variations ranging from room temperature up to 300ºC, then Vicker's test. The degree of hardness and Vickers indent profile on the surface of the material with the temperature variation is then investigated.


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