MPa 10 ksi

Endurance limit To develop S-N curves the fatigue specimen is loaded until, for example, the maximum stress in the sample is 275 MPa (40 ksi) (Fig. 2-43). At this stress level it may fail in only 10 cycles. These data are recorded and the stress level is then reduced to 206 MPa (30 ksi). Tliis specimen may not break until after 1,000 stress cycles at this rather low stress level. 

Fig. 10.10 Effects of tool profile and orientation on the predicted flow from a two-dimensional computational fluid dynamics ° model using interfacial slip, with a limiting shear stress of 40 MPa (6 ksi). (a, b) Velocity vectors and the boundary at...

ASTM specification Alloy system Condition Yield strength (MPa) (ksi) Tensile strength (MPa) 1 (ksi) Elongation (%) Elastic modulus (GPa) 1 (10 ksi) ... 

MPa (160 ksi) UTS. Room-temperature data R=0.10 5Hz. Source MA Iman, etal.. On Fatigue Crack Growth in a Th4.5AI-5Mo-1.5Cr Alloy with Metastable p-Phase, RacttaeMechanics, M 21... 

The effects of cold work and tensile strerrgth on the average fotigue He of 10 mm (0.4 in.) dfem shot peened to 0.016 to 0.018 A. Each data point represents the log average of six tests. Ti-13V-1Cr-3AI data points included for comparison. 1034 MPa (150 ksi) maximum stress, a=0.1,30 Hz. 

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