ISSN:
1460-2695
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Retardation in fatigue crack growth rate following the application of single and periodic tensile overloads was studied for 2024-T3 and 7075-T6 aluminium alloys. Tests were performed at constant stress and at constant stress intensity factor ranges, at a load ratio of R= 0.1, at a baseline ΔK in the 10–20 MPa√m range which corresponds to the Paris regime. Overload ratios of 1.3–1.65 were studied with overload spacing, n, varying from 20 to 10 000 cycles. 2024-T3 displayed an order of magnitude higher retardation, Nd, due to single tensile overloads compared to 7075-T6. Periodic overloads induced maximum retardation when n/Nd≈ 0.5 for both alloys, the magnitude being only 15% higher for 2024-T3.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1460-2695.2004.00800.x
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