Figure 15
The Wohler curve compares horizontal 6061 alloy samples tested by E C O, F A S T, and H D parameters. The stress-life equations are F A S T: y equals 897.92 x to the power negative 0.126, H D: y equals 1180.1 x to the power negative 0.145, and E C O: y equals 1304.8 x to the power negative 0.152. Stress at 6 million cycles is 128.58 M P a for F A S T, 126.06 M P a for E C O with a negative 2.5 percent difference, and 125.11 M P a for H D with a negative 2.7 percent difference. Mean absolute error values are 11.59 for F A S T, 8.78 for E C O, and 8.56 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 horizontally manufactured Aluminium 6061-RAM2C samples
Source: Authors’ own generation