The ASTM standard for tensile testing of metallic materials is ASTM E8. This standard specifies the methods for testing the tensile properties of metallic materials, including the determination of yield strength, tensile strength, and elongation. This standard can be used for testing a wide range of metallic materials, including aluminum and aluminum alloys. If you are testing a metal matrix composite material, it is important to consider the specific properties and behavior of the composite material, as well as the methods used to manufacture and prepare the sample. You may need to consult other ASTM standards or guidelines that are relevant to your specific material and application.
The amount of force applied during a tensile test for an aluminium metal matrix composite will depend on the specific material being tested and the desired results. Generally, the force applied should be enough to cause the material to fail, but not so much that it causes permanent deformation. The force should also be applied in a uniform manner, so that the results are consistent and repeatable. The force should be applied gradually, increasing the load until the material fails. The force should be monitored throughout the test to ensure that the material is not being overstressed.