That friction is used to generate enough heat to allow both components to reach a plastic state where the materials are forced together to form a bond.
(That friction; is used; to generate enough heat) (the materials; to form; a bond) (That friction; to generate; enough heat to allow both components to reach a plastic state) (the materials; are forced together; to form a bond; L:a plastic state)
That friction the materials That friction the materials
is used to form to generate are forced together
to generate enough heat
a bond
enough heat to allow both components to reach a plastic state
to form a bond L:a plastic state