【国家标准】 金属材料　多轴疲劳试验　轴向-扭转应变控制热机械疲劳试验方法

This document specifies the testing apparatus, specimen, testing procedure, test results and test report of multiaxial themo-mechanical fatigue testing under axial-torsional strain-controlled loading for metallic materials.
This document is applicable to the test of the thin-walled tubular metal specimens under the conditions of constant axial mechanical strain cycle, constant shear strain cycle and constant temperature cycle with any constant cyclic strain ratio,any constant phase angle between axial mechanical strainand shear strain,and any constant phase angle between axial mechanical strain and temperature.