Influence of laser polishing in an inert atmosphere on the high cycle fatigue strength of AISI 1045 steel
Source abstract
Abstract
Abstract This paper presents a study of the high-cycle fatigue behaviour of normalised 1045 AISI steel after laser polishing in a N2 atmosphere. When laser polishing is done in air, the surface layer has pores, inclusions and oxides, which are detrimental to the fatigue strength; however, laser polishing in N2 produces better surface features and fatigue-behaviour. With the laser parameters used in this study, a heat-affected zone of about 100 μm appears in the surface where the residual stresses are compressive. In this zone, the metallurgical structure is martensitic and ferritic because the pearlitic zones have changed to martensitic during the laser-polishing process, while the ferritic ones have remained unchanged. Fatigue tests showed that the fatigue strength is scarcely affected by laser polishing in N2. This paper also provides quantitative data and calculation procedures useful for the fatigue analysis of 1045 AISI steel components finished by laser polishing in an inert atmosphere.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Surface Treatment and Residual Stress · Additive Manufacturing Materials and Processes · Metal Alloys Wear and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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