科研之友
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摘要
The surface region of electric discharge machined aluminum foams was modified by the friction surface modifying and rolling (FSMR) process A new surface was successfully obtained through the FSMR process which was considerably smoother and denser than that of the unprocessed aluminum foam In the FSMR process the amount and morphology of the residual pores are mainly dominated in the surface of metallic foams by the friction surface modification (FSM) process stage The smoothest surface however was formed for the friction surface modified and rolled (FSMRed) aluminum foam which was attributed to the additional rolling process after the FSM process This result demonstrates that the FSMR process is a very effective technology in controlling the surface morphology of the metallic foams through the cell structure control of the surface region For the FSMRed aluminum foam the highest average bonding strength yield strength and toughness were obtained which were nearly equivalent to 1 4 2 and 1 6 times the values of the unprocessed aluminum foam respectively This result shows that in the FSMR process the additional rolling process after the FSM process is very effective in enhancing the bonding characteristics of the metallic foams by smoothening the surface In addition the above mentioned bonding characteristics were remarkably increased with the decrease in the surface roughness suggesting the surface morphology is a very important parameter in controlling the bonding characteristics of the metallic foams The experimental results revealed that the FSMR process is a very effective technology for the improvement of the bonding characteristics of the metallic foams through the control in the surface morphology
- 出版日期2010-10
