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Title: La Resistance A La Fatigue Des Toles Oxycoupees
Author: Piraprez, E.
Source: Conf Proc: ICSP-1, (p.405-412)
Publication year 1981
Document number: 1981044
Number of pages: 7
Abstract:
The nonhomogeneous heat distribution during gas cutting of AE355 steel involves the creation of residual stresses that influence the fatigue strength or the stress value
under which instability phenomena appear. A research has been undertaken to study the behavior of thermal-cut elements and, if possible, to establish a method to improve
their mechanical characteristics. The scratches of grinding constitute rupture beginnings nearly as harmful as the drag lines of cutting, but shot peening of the gas-cut
face improves the fatigue strength to a value between 30 and 35 N/mm exp 2, which is a higher value than that obtained by preheating the plate before cutting.
Descriptors: Structural steels-- Mechanical properties; Plate metal-- Machining; Oxygen cutting; Fatigue strength; Residual stress; Shot peening
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