Figure 16
The Wohler curve compares vertical 6061 alloy samples tested by E C O, F A S T, and H D parameters. The stress-life equations are E C O: y equals 968.18 x to the power negative 0.129, F A S T: y equals 1071.1 x to the power negative 0.14, and H D: y equals 946.35 x to the power negative 0.132. Stress at 6 million cycles is 132.37 M P a for E C O, 123.59 M P a for F A S T with a negative 9.4 percent difference, and 123.53 M P a for H D with a negative 9.4 percent difference. Mean absolute error values are 7.84 for E C O, 9.45 for F A S T, and 7.74 for H D. A schematic shows mini-sample geometry dimensions.Comparison of the S-N curves of three different parameter sets ECO, FAST and HD in vertically manufactured Aluminium 6061-RAM2C samples
Source: Authors’ own generation