In this research Accumulative roll-bonding was used to produce Cu foam. CaCO 3 powder was utilized as the blowing agent. Accumulative roll-bonding carried out in 4 cycles with 75% reduction. CaCO 3 powder was scattered in the between layers of copper, in different weight percentages (0.1 to 0.5). 4 cycle operation was performed for each of the powder. To create porosity in the structure, samples were heated at 5 temperatures (650, 700,800,900 and 1000 ° C). To investigate mechanical behavior, compression test was carried out and Microstructures were investigated by Scanning Electron Microscopy. The Scanning Electron Microscopy results indicate that the distribution of porosity caused by the decomposition of calcium carbonate were improvement in all weight percent of CaCO 3 by increasing the number of Accumulative roll-bonding cycles. The distribution of porosity was improved in 3 rd cycle at low percentage of CaCO 3 and in 0.4 wt% more number of ARB cycles were need to achieve suitable distribution but in 0.5 wt% the sample was failed. Mechanical properties and compressive strength were improved by increasing the number of ARB cycles. The highest compressive strength was achieved in 4 th cycle. The optimal temperature for foaming was 900 ° C. Key words : Cu foam, Accumulative roll-bonding, CaCO 3 , Mechanical properties, Microstructure
