An interlaboratory test program was devised by ASTM Committee D-14 on Adhesives to study the effects of the rate of loading of the ultimate tensile shear strength of metal-to-metal adhesive-bonded lap-shear specimens. Two metals, three adhesives, two overlap lengths, and four rates of loading were studied. The tensile shear specimens tested at rates of stressing from 600 to 2000 psi per min showed very little change in strength due to the rate of stressing. For a given rate of stressing the rate of strain which was observed by changes in crosshead speed increased as the modulus of elasticity of adhesives decreased. It is not possible, therefore, to express one rate of stressing as being equivalent to a particular rate of strain for adhesives that have different moduli of elasticity.
Aluminium composite is an attractive material for using in corrossive environment. Many studies have been conducted on corrossion rate in Aluminium composites. In this work Aluminium 7075 composite is reinforced with TiB 2 and Cr 2 O 3 with different weight perentage of reinforcements. From the results it is understood that the density of the composite increases with more addition of reinforcements to the matrix. The uniform immersion test (ASTM-G31) in 90 ml of HCl was conducted. It was found that there is an increase in corrossion resistance when the reinforcements were added.
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