Effect of cladding direction on the microstructure and mechanical properties of Hadfield gradient layers on R260 rails

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25510%2F25%3A39923739" target="_blank" >RIV/00216275:25510/25:39923739 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.37904/metal.2025.5138" target="_blank" >https://doi.org/10.37904/metal.2025.5138</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/metal.2025.5138" target="_blank" >10.37904/metal.2025.5138</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of cladding direction on the microstructure and mechanical properties of Hadfield gradient layers on R260 rails

Popis výsledku v původním jazyce

Rolling Contact Fatigue (RCF) is a critical issue that degrades rail surfaces, leading to structural damage and reducing service life. Effective repair techniques, such as plasma cladding with powder filler metal, can restore rail integrity and enhance performance. This study investigates the influence of cladding direction on the microstructure and mechanical properties of Hadfield gradient layers deposited on R260 rails. The research focuses on how deposition orientation affects hardness, phase transformations, and microstructural evolution, particularly the formation of martensitic layers and carbide precipitation within the heat-affected and repaired zones. Optical and electron microscopy are employed for microstructural analysis, while spherical indentation and Vickers hardness testing assess mechanical performance. The study reveals that cladding direction significantly influences carbide distribution, martensitic transformation, and hardness gradients, ultimately impacting fatigue resistance and durability. A deeper understanding of these variations provides valuable insights into optimizing cladding strategies for improved rail repair outcomes. The findings contribute to developing advanced repair methodologies, ensuring prolonged rail service life and enhanced resistance to fatigue-induced failures. Additionally, the study examines the effect of the number of welding layers and movement patterns of the welding torch in cladding to eliminate the need for post-weld heat treatment. This research serves as a foundation for refining welding parameters and deposition techniques to achieve superior mechanical performance in repaired railway components, ultimately leading to safer and more reliable railway infrastructure.

Název v anglickém jazyce

Effect of cladding direction on the microstructure and mechanical properties of Hadfield gradient layers on R260 rails

Popis výsledku anglicky

Rolling Contact Fatigue (RCF) is a critical issue that degrades rail surfaces, leading to structural damage and reducing service life. Effective repair techniques, such as plasma cladding with powder filler metal, can restore rail integrity and enhance performance. This study investigates the influence of cladding direction on the microstructure and mechanical properties of Hadfield gradient layers deposited on R260 rails. The research focuses on how deposition orientation affects hardness, phase transformations, and microstructural evolution, particularly the formation of martensitic layers and carbide precipitation within the heat-affected and repaired zones. Optical and electron microscopy are employed for microstructural analysis, while spherical indentation and Vickers hardness testing assess mechanical performance. The study reveals that cladding direction significantly influences carbide distribution, martensitic transformation, and hardness gradients, ultimately impacting fatigue resistance and durability. A deeper understanding of these variations provides valuable insights into optimizing cladding strategies for improved rail repair outcomes. The findings contribute to developing advanced repair methodologies, ensuring prolonged rail service life and enhanced resistance to fatigue-induced failures. Additionally, the study examines the effect of the number of welding layers and movement patterns of the welding torch in cladding to eliminate the need for post-weld heat treatment. This research serves as a foundation for refining welding parameters and deposition techniques to achieve superior mechanical performance in repaired railway components, ultimately leading to safer and more reliable railway infrastructure.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2025 : Conference Proceedings

ISBN

978-80-88365-27-3

ISSN

2694-9296

e-ISSN

2694-9296

Počet stran výsledku

6

Strana od-do

291-296

Název nakladatele

TANGER, spol. s r.o.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

21. 5. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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