The accumulative roll-bonded (ARBed) welding tests of annealed pure Al L2 are carried out for 10 cycles at room temperature. The effect of rolling cycle on bonding interface by optical microscope and the effect of rolling cycle on the mechanical properties in tensile tests at room temperature and by microhardness tests are investigated. The research shows that the effect of the sample is better and better with the increase of the rolling cycles. The bonding mechanism is N.Bay. The strength and microhardness of the material is improved obviously with the increase of  the cycles

but the elongation drops sharply. The tensile strength

yield strength and elongation of the material after 10th cycle are 190.44MPa

152.27MPa and 4.73%

respectively.