Anti-fatigue controlled laser shot peening method and device therefor
A laser peening and anti-fatigue technology, which is applied in the direction of manufacturing tools, heat treatment process control, process efficiency improvement, etc., can solve the problems that have not yet been searched for controlled laser peening strengthening, and meet the strengthening requirements and improve work efficiency. Effect
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[0051] Example: Laser shot peening of 6061-T6 aviation aluminum alloy single center hole fatigue specimen
[0052] Because laser shot peening is especially suitable for processing fatigue parts with local stress concentration, such as machine parts with fatigue-prone notches, holes, and corners, and aluminum alloys are commonly used aerospace materials, 6061-T6 is selected in this example. The aviation aluminum alloy single center hole fatigue specimen is laser shot peened, and its shape and size are as follows Figure 4 As shown, the outer dimensions are machined first, and the center hole is subsequently bored to a diameter of 2mm. The experiment uses a PLA30050 fatigue tensile testing machine. Before laser shot peening of the parts, when the maximum load is 7KN, the minimum load is 0.7KN, the stress ratio is 0.1, and the test frequency is 13HZ, the fatigue life is 88000. It is required to increase the fatigue life by more than 150% by laser shot peening, that is, more than...
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