Relaxation of Metals at High Temperatures

摘要: Much experimental work has been done on the creep of metals and long‐time test is standard means rating resistance to slow deformation under tensile stress. In engineering practice, frequently, cases are found in which total strain not stress remains constant. what become known as relaxation, an initially pure elastic gradually transformed into a permanent while length bar unchanged. Several years ago some new apparatus was designed built primarily duplicate above conditions connection with study bolt materials for steam turbines. The unusual accuracy exceptionally good results obtained from automatic relaxation machine during more than two operation indicate that type may well comparison at great reduction testing time.