Sign in to use this feature.

Years

Between: -

Subjects

remove_circle_outline

Journals

Article Types

Countries / Regions

Search Results (1)

Search Parameters:
Keywords = railway axle seats

Order results
Result details
Results per page
Select all
Export citation of selected articles as:
15 pages, 5555 KB  
Article
Residual Stresses and the Microstructure of Modeled Laser-Hardened Railway Axle Seats under Fatigue
by Jiří Čapek, Karel Trojan, Jan Kec, Nikolaj Ganev, Ivo Černý and Tomáš Mužík
Metals 2024, 14(3), 290; https://doi.org/10.3390/met14030290 - 29 Feb 2024
Cited by 6 | Viewed by 2028
Abstract
Railway wheels are usually attached to axles by press-fitting; therefore, the mechanical processes taking place during operation can result in failure, with fatal consequences for the axle seats. This manuscript describes the effect of laser hardening on the residual stress state, microstructural parameters [...] Read more.
Railway wheels are usually attached to axles by press-fitting; therefore, the mechanical processes taking place during operation can result in failure, with fatal consequences for the axle seats. This manuscript describes the effect of laser hardening on the residual stress state, microstructural parameters (lattice defects—dislocations, crystallites, microstrains, etc.), and mechanical properties of laser-hardened EA1N steel railway axles under fatigue life conditions. Differences were found between ground, single-track, and multi-track hardened surfaces. Tensile residual stresses, low dislocation densities and hardnesses, and different microstructures (tempered cubic martensite) were found at the overlapped tracks and at the boundary of the heat-affected zone and bulk surface compared with the hardened zone. As a result, the surface treatment of axle seats by laser hardening improved the fatigue failure resistance compared with untreated seats. Optimal properties of the integrity of the axle seat surface were achieved, including fatigue resistance, which seems to be positively influenced mainly by sufficient hardness and the appropriate microstructure. The influence of the other investigated parameters was not evident, and was reduced by the presence of fretting corrosion and press-fitting. Full article
Show Figures

Figure 1

Back to TopTop