NIMS fatigue data sheet on low- and high-cycle fatigue properties of A2017-T4 (Al-4.0Cu-0.6Mg) aluminium alloy

The new fatigue data sheet, No. 133, discloses low- and high-cycle properties of A2017-T4 aluminium alloys. Two types low-cycle tests were conducted under strain-controlled conditions. One comprised incremental step to clarify cyclic stress-strain curves. other constant- strain amplitude the lives. alloys revealed strong hardening that resulted in very high cycle yield stresses. stresses higher than those titanium steels. Constant-strain showed plastic amplitudes be smaller most cases elastic amplitudes. These appeared attributable small elongation, low modulus Three heats equivalent lives when their strengths evaluated by amplitude. Evaluation stress amplitude, contrast, differences between heats, likely caused effects stress. up 108 cycles uniaxial carried out load-controlled Many specimens fractured at over 107 cycles, so limits not confirmed. proportional tensile strengths. 107-cycle close austenitic stainless steels normalized carbon steels, while 108-cycle lower. In short, deceased showing need for gigacycle tests. will described next issue.